IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Humidity intrusion effects on the properties of sound acoustic of autoclaved ...eSAT Journals
Abstract Autoclaved Aerated Concrete (AAC) has been commonly known to exhibit favorable thermal properties, high fire resistance and high compressive resistance at relatively low density. However, little attention has been devoted to the sound insulation performance of AAC. One of the points needs to know is humidity intrusion effects on AAC members in areas with high relative humidity levels of Mediterranean climates which are important in durability and insulation properties of AAC. Tests on mechanical and physical properties of ACC carried out to study humidity intrusion effects on AAC members were studied with and w/o coatings on the surfaces. From the findings of this study, physical and mechanical autoclaved aerated concrete evaluated in three different humidity levels to compare the effect of humidity on properties of AAC. According to test results coating is the most important factor for improving resistivity of AAC walls, and these factors help AAC walls to keep their mechanical and physical properties against humidity. With its closed air pockets, AAC can provide very good sound insulation. This paper presents the results of studies on acoustic properties of AAC partitions aimed at identifying the effect of specific factors on AAC sound insulation performance. Keywords: AAC, concrete, humidity, sound acoustic, decibel
IRJET- Utilization of Agricultural Waste in the Manufacturing of Wooden Parti...IRJET Journal
This document summarizes a study on utilizing agricultural waste materials to manufacture wooden partition panels. Specifically, it examines using rice husk, corncob, coconut husk, and groundnut shell as materials. These agricultural wastes are dried, ground, mixed with urea formaldehyde resin and ammonium chloride hardener, and compressed into panels using a hydraulic press. The study then performs various tests on the agricultural waste panels, such as compressive strength and water absorption, and compares the results to wooden panels. The purpose of the study is to develop a more economical and environmentally friendly alternative to traditional wooden panels by utilizing agricultural byproducts.
Introduction of material & manufacturing processSyuk Bond
Manufacturing involves converting raw materials into products through processes like designing, planning, and quality control. It adds value to materials and is important for creating wealth. Key factors in manufacturing include materials, labor, methods, and equipment, which must be properly combined for low cost, high quality, and on-time delivery. Design for manufacturability aims to ease manufacturing and lower costs through guidelines like standardizing parts, reducing components, and maximizing compliance. Material properties important for manufacturing include hardness, toughness, conductivity, density, elasticity, and strength, which determine a material's suitability for different applications.
Machinability assessment in turning of inconel 718 nickel base super alloys a...IAEME Publication
This document reviews the machinability of Inconel 718, a nickel-base super alloy that is difficult to machine. It discusses how Inconel 718's properties like high hardness and low thermal conductivity lead to high cutting temperatures that make it challenging to cut. The document then summarizes research on different cutting tools used for machining Inconel 718, including coated carbides, cubic boron nitride, and ceramic tools. It provides details on how each tool type performs at various speeds and feeds when turning Inconel 718.
This document outlines the course structure and content for DES 523: Materials and Fabrication Processes. The course covers 6 units that examine materials like metals, ceramics, glass and plastics as well as manufacturing processes. Additional topics include joining techniques, automation, product design principles, sustainable manufacturing, and an overview of ferrous and non-ferrous metals and their common uses. Lectures provide details on concurrent engineering, design for manufacturing, principles for economic production, and product lifecycles.
Traditional machining of Inconel 718 generates residual stresses and lower surface quality compared to non-traditional machining. Non-traditional methods like EDM and laser machining produce better surface integrity with minimal damage. The document reviews different studies on optimizing machining parameters for conventional turning and EDM of Inconel 718 to maximize material removal rate while minimizing surface roughness and recast layer thickness.
Galvanized iron pipes are commonly used for earthing electrodes but are prone to corrosion underground which degrades the earthing system over time. Manufacturers often use substandard materials and techniques like thinner galvanized coating, cheaper infill materials like mud instead of graphite, and internal strips that are too short or thin, claiming higher quality components. This can damage the earthing system and reduce the life of the conductor, leading to internal rusting, whereas quality electrodes should provide corrosion resistance and an expected service life of 25 years.
The document summarizes information about various types of rubber, sealants, and their markets. It discusses Buna N rubber, its properties and manufacturing process. It also outlines EPDM rubber, its increasing demand, properties, manufacturing and applications. Additionally, it covers vinyl rubber known as EVA including its market needs, properties, manufacturing and applications. Finally, it briefly mentions various types of sealants like acoustic sealants, firestop barrier sealants, polyisobutylene asphalts, non-curing butyl sealant and their applications and pricing.
Humidity intrusion effects on the properties of sound acoustic of autoclaved ...eSAT Journals
Abstract Autoclaved Aerated Concrete (AAC) has been commonly known to exhibit favorable thermal properties, high fire resistance and high compressive resistance at relatively low density. However, little attention has been devoted to the sound insulation performance of AAC. One of the points needs to know is humidity intrusion effects on AAC members in areas with high relative humidity levels of Mediterranean climates which are important in durability and insulation properties of AAC. Tests on mechanical and physical properties of ACC carried out to study humidity intrusion effects on AAC members were studied with and w/o coatings on the surfaces. From the findings of this study, physical and mechanical autoclaved aerated concrete evaluated in three different humidity levels to compare the effect of humidity on properties of AAC. According to test results coating is the most important factor for improving resistivity of AAC walls, and these factors help AAC walls to keep their mechanical and physical properties against humidity. With its closed air pockets, AAC can provide very good sound insulation. This paper presents the results of studies on acoustic properties of AAC partitions aimed at identifying the effect of specific factors on AAC sound insulation performance. Keywords: AAC, concrete, humidity, sound acoustic, decibel
IRJET- Utilization of Agricultural Waste in the Manufacturing of Wooden Parti...IRJET Journal
This document summarizes a study on utilizing agricultural waste materials to manufacture wooden partition panels. Specifically, it examines using rice husk, corncob, coconut husk, and groundnut shell as materials. These agricultural wastes are dried, ground, mixed with urea formaldehyde resin and ammonium chloride hardener, and compressed into panels using a hydraulic press. The study then performs various tests on the agricultural waste panels, such as compressive strength and water absorption, and compares the results to wooden panels. The purpose of the study is to develop a more economical and environmentally friendly alternative to traditional wooden panels by utilizing agricultural byproducts.
Introduction of material & manufacturing processSyuk Bond
Manufacturing involves converting raw materials into products through processes like designing, planning, and quality control. It adds value to materials and is important for creating wealth. Key factors in manufacturing include materials, labor, methods, and equipment, which must be properly combined for low cost, high quality, and on-time delivery. Design for manufacturability aims to ease manufacturing and lower costs through guidelines like standardizing parts, reducing components, and maximizing compliance. Material properties important for manufacturing include hardness, toughness, conductivity, density, elasticity, and strength, which determine a material's suitability for different applications.
Machinability assessment in turning of inconel 718 nickel base super alloys a...IAEME Publication
This document reviews the machinability of Inconel 718, a nickel-base super alloy that is difficult to machine. It discusses how Inconel 718's properties like high hardness and low thermal conductivity lead to high cutting temperatures that make it challenging to cut. The document then summarizes research on different cutting tools used for machining Inconel 718, including coated carbides, cubic boron nitride, and ceramic tools. It provides details on how each tool type performs at various speeds and feeds when turning Inconel 718.
This document outlines the course structure and content for DES 523: Materials and Fabrication Processes. The course covers 6 units that examine materials like metals, ceramics, glass and plastics as well as manufacturing processes. Additional topics include joining techniques, automation, product design principles, sustainable manufacturing, and an overview of ferrous and non-ferrous metals and their common uses. Lectures provide details on concurrent engineering, design for manufacturing, principles for economic production, and product lifecycles.
Traditional machining of Inconel 718 generates residual stresses and lower surface quality compared to non-traditional machining. Non-traditional methods like EDM and laser machining produce better surface integrity with minimal damage. The document reviews different studies on optimizing machining parameters for conventional turning and EDM of Inconel 718 to maximize material removal rate while minimizing surface roughness and recast layer thickness.
Galvanized iron pipes are commonly used for earthing electrodes but are prone to corrosion underground which degrades the earthing system over time. Manufacturers often use substandard materials and techniques like thinner galvanized coating, cheaper infill materials like mud instead of graphite, and internal strips that are too short or thin, claiming higher quality components. This can damage the earthing system and reduce the life of the conductor, leading to internal rusting, whereas quality electrodes should provide corrosion resistance and an expected service life of 25 years.
The document summarizes information about various types of rubber, sealants, and their markets. It discusses Buna N rubber, its properties and manufacturing process. It also outlines EPDM rubber, its increasing demand, properties, manufacturing and applications. Additionally, it covers vinyl rubber known as EVA including its market needs, properties, manufacturing and applications. Finally, it briefly mentions various types of sealants like acoustic sealants, firestop barrier sealants, polyisobutylene asphalts, non-curing butyl sealant and their applications and pricing.
Experimental Study on Effect of Wood Ash on Strength of ConcreteIRJET Journal
This study investigated the effect of wood ash as a partial replacement for cement in concrete. Concrete cubes were made with 0%, 10%, 20%, 30%, and 40% replacements of cement with wood ash by weight. The cubes were tested for compressive strength at 7 and 28 days. Results showed that compressive strength initially decreased with higher wood ash content but improved significantly after 28 days. The 20% wood ash mix performed best, showing improvements in compressive strength over normal concrete at 28 days. It was concluded that 20% is the optimum wood ash replacement amount to gain strength benefits while using less cement.
IRJET- Utilization of Bamboo as Reinforcement Steel in Concrete for Sustainab...IRJET Journal
This document discusses utilizing bamboo as a reinforcement material in concrete as a more sustainable and affordable alternative to steel. Some key points:
- Bamboo is a very fast growing grass that is abundant in many tropical and sub-tropical regions. It has high strength and is much cheaper and requires less energy to produce than steel.
- Experiments have shown that some bamboo species have a tensile strength comparable to mild steel. Bamboo also has good compressive strength and buckling resistance.
- For use as concrete reinforcement, bamboo should be properly selected, seasoned, split, treated with waterproofing or CCB to prevent insects, and installed using similar techniques as steel reinforced concrete.
- Using bamboo reinforcement
A Brief Study on the Strength Properties of Concrete Modified with Silica Fum...IRJET Journal
This document presents a study on the strength properties of concrete modified with silica fume aggregates and iron oxide nanoparticles. Various concrete mixes were prepared by replacing coarse aggregates with silica fume aggregates and partially replacing cement with silica fume, slag, and fly ash along with additions of 0-2% iron oxide nanoparticles. The concrete was tested at 28 days for compressive strength, flexural strength, modulus of elasticity, and Mode-II fracture behavior. The results showed that the mix with 11% cement replaced with pozzolans and 1.5% iron oxide nanoparticles exhibited the best performance with 46% higher compressive strength and 33% higher flexural strength compared to normal concrete. The study demonstrated that the use
Aluminium oxide (Alumina)is widely used as protective coating in various application. Optical alumina mainly depends on deposition condition. probe system is used to measure both thickness and optical constant.
This document summarizes a study that evaluated the potential of using textile waste to create sustainable insulation materials. Four nonwoven insulation samples were created from acrylic (A1 and A2) and wool (W1 and W2) textile waste using a needle-punching technique. The samples were tested for their physical and thermal properties. Thermal conductivity ranged from 0.0335 to 0.0350 W/(m K) across the samples. Air permeability was satisfactory at 600-616 L/(m2s) for acrylic and 950-1033 L/(m2s) for wool. Porosity and density were found to influence thermal conductivity and air permeability, with both decreasing with higher porosity
Prediction of Weld Quality of A Tungsten Inertr Gas Welded Mild Steel Pipe Jo...IJERA Editor
The weld quality of tungsten inert gas (TIG) welded joint has been investigated to identify the most economical weld parameters that will bring about optimum properties. Response surface methodology has been used in the optimization of the tungsten inert gas weld of mild steel pipes. Response surface methodology, based on the central composite face centered design was generated for the purpose of optimization of the weld quality.All the process parameters have desirability of 1. Tensile strength response for this solution have a desirability of 0.910595 and the yield strength of 0.59. Result showed that minimizing current and voltage an average tensile strength of 535.452MPa and yield strength of up to 408.74MPa can be achieved, while keeping gas flow rate and electrode diameter within the range of test. It was also deduced that tensile elongation of the TIG weld is not influenced by the process parameters selected for the purpose of this study.
1. Precision forging is a metal shaping process that uses plastic deformation to form parts close to their final dimensions, requiring little to no subsequent machining.
2. It involves refining traditional forging techniques like preheating, descaling, lubrication, and temperature control to achieve close tolerances and surface finishes.
3. Common applications include aircraft, power generation, and automotive components that have high dimensional and quality standards like connecting rods.
IRJET- Importance of Bamboo in Building ConstructionIRJET Journal
This document discusses the importance and uses of bamboo in building construction. It notes that bamboo is a renewable and versatile material that is strong yet lightweight. Bamboo grows very quickly, three times faster than most trees. It has high tensile strength similar to steel. The document outlines how bamboo is used as a building material for walls, floors, roofs, and other structural elements. Bamboo is a low-cost and sustainable alternative to wood and other materials for housing construction.
Impact of Alumina Trihydrate and Silica on Mechanical, Thermal and Electrical...CrimsonPublishersRDMS
Impact of Alumina Trihydrate and Silica on Mechanical, Thermal and Electrical Properties of Silicone Rubber Composites for High Voltage Insulations by Hidayatullah Khan* in Crimson Publishers: Peer Reviewed Material Science Journals
IRJET- Tribological Behavior of Silicon Nitride on Addition of Hexagonal Boro...IRJET Journal
This document summarizes a study on the tribological behavior of silicon nitride composites with the addition of hexagonal boron nitride. Silicon nitride is promising ceramic material for industrial applications requiring high strength and fracture resistance. The addition of hexagonal boron nitride to silicon nitride can decrease the friction coefficient and improve wear resistance. The study used a pin-on-disc tribometer to test silicon nitride composite samples with varying amounts of hexagonal boron nitride, ranging from 4-16% by volume. The results showed that addition of hexagonal boron nitride decreased the friction coefficient and wear rate, with the best performance at 10% hexagonal boron nitride by volume.
Effect of High Temperature on Compressive Strength of ConcreteIOSR Journals
This document summarizes research on the effect of high temperatures on the compressive strength of concrete. Ninety concrete cubes were cast in three grades and subjected to temperatures from 200°C to 800°C for 1-2 hours. Testing found that strength was largely unaffected up to 350°C but started declining at 500°C, with over 30% reduction at 650°C. Beyond 650°C, concrete was largely decimated. Higher exposure times and temperatures led to greater strength reduction. The research adds to understanding concrete performance in fire conditions and suggests serviceability may be maintained up to 500°C but major repair is needed over 650°C.
H.P. fibres are the fibres which have which have high strength, temperature resistance, good flexibility, light weight, fine diameter & durability etc. Qualities are used mainly for technical textile purpose.
Lambourne J_Seaweed as an Insulation - Thesis PresentationJack Lambourne
This document summarizes a research project investigating the potential use of seaweed as a building insulation material. It provides an overview of the background and motivation for the research, methodology, and results. The methodology included harvesting different types of seaweed, performing preliminary testing on fire resistance and porosity, comparing thermal properties to existing insulations using a hot box method, and conducting a life cycle assessment using GaBi software. Key findings from the research included the seaweed materials having fire resistance class B2 or better and U-values between 0.35-0.44 W/m2K when tested in 100mm thick panels, which compared favorably to other natural insulations. The life cycle assessment found the seaweed insulation had lower
Study of mechanical properties of concrete at elevated temperatures a revieweSAT Journals
Abstract Concrete, the second highest consumed material after water in the world, plays a vital role in the construction field because of the versatility in its use. Developments during the last two decades have shown a marked increase in the number of structures involving the long time heating of concrete. In recognition of its importance, many researchers have attempted to investigate the effect of elevated temperature on mechanical properties of concrete. These researchers, during their investigation, used materials with varying combination and different experimental conditions. These materials include cement, different percentages of admixtures like fly ash, silica fume, metakaolin, finely grounded pumice(FGP), group granulated blast furnace slag(GGBS), polypropylene fibre(PP fibre), palm oil fuel ash(POFA), Portland pozzolana cement(PPC), rice husk ash(RHA), different fine and coarse aggregates, super plasticisers, retarders and the conditions included a temperature range of 28oC to 1200oC . The other conditions that were varied are the shapes and sizes of test specimens, curing methods, curing conditions and test methods. The analysis of these investigations and their results are reviewed and presented in this paper. Key words: concrete, mechanical properties, elevated temperature, admixtures, curing methods
Effects Of Indoor Environmental Quality On The Occupants Of Islamic Universit...KHALIL EL KHATEEB
This document summarizes a study on the impact of indoor environmental quality (IEQ) on employees at the Islamic University of Gaza. The study aims to measure levels of carbon monoxide, carbon dioxide, particulate matter and noise, assess thermal comfort, and examine the relationship between IEQ and job satisfaction. Methodology includes literature review, on-site measurements, and distributing questionnaires. Key findings indicate higher than standard levels of carbon dioxide and particulate matter, with natural ventilation performing better than air conditioning. Recommendations include regular monitoring, awareness campaigns, and setting IEQ standards.
Gravity Sand Casting of Metallurgical Bonded Bimetallic Grinding Roll Made of...IJERA Editor
Bimetallic castings are widely used in the mining industries as construction material for crushers which have to perform high abrasive resistance at the outer side and excellent machinability at the inner side. To manufacture bimetallic casting goods cconsecutive centrifugal and gravity casting methods are commonly applied. Centrifugal and consecutive casting come up with geometrical constraints at the parting line of both materials. This research dealed with the manufacturing of tapered grinding roll by applying gravity casting method. The possibilities of casting the white cast iron outer ring in the preheated ductile cast iron of the inner ring were investigated. The inner ring was first heated up by casting liquid metal around the inner side, which prevented the inner ring from cracking due to rapid expansion during the casting process and to provide adequyate shrinkage of inner ring during solidification. After achieving the desired temperature of the inner ring, the liquid metal of white cast iron was then poured into the cavity to form the outer ring. The preheating temperature of the inner ring was mainly derived from the linear thermal expansion of both quasi isotrophic material and the diffusion at the parting line. This preheating temperature has to facilitate the formation of metallurgical bonding and avoid cracks due to the difference of shrinkage value between inner and outer ring. The preheating temperature was set up in the range of 500°C -1000 °C and the flushing time was fixed for 7 seconds. Studies on the microstructure of sample material have revealed a formation of metallurgical bonding at all of the preheating temperature. The width of the diffusion at the interface area varied between 291 µm at 500 oC preheating temperature, 301 µm at 625 oC, 834,8 µm at 750 °C, 909,1 µm at 875 °C and 1027,7 µm at 1000 °C. By preheating temperature of higher than 750°C fusion occured at the interface area between inner and outer material. This research concludes that the casting of bimetallic by applying gravity casting method can be done by preheating the inner ring to 625 oC, interface temperature of 1150 oC, flushing time of 7 seconds and pouring the white cast iron outer ring at the temperature of 1430 oC
IRJET- Partial Replacement of Cement in Concrete with Granite Powder and ...IRJET Journal
This document summarizes a study that partially replaced cement and fine aggregate in concrete with granite powder and saw dust. Concrete cubes were cast with 10%, 20%, and 30% replacement by weight of cement with granite powder and tested for compressive, tensile, and flexural strength at 7, 14, 21, and 28 days. Testing showed that 10% replacement increased strengths compared to 20% and 30% replacement. So partial replacement of locally available granite powder and saw dust can improve concrete properties while reducing costs. The chemical and physical properties of the granite powder and saw dust used in the study are presented along with the testing methodology.
International Journal of Engineering Research and Applications (IJERA) aims to cover the latest outstanding developments in the field of all Engineering Technologies & science.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
Defination of SPND, its charecterstics like mechanical and Nuclear, Technical specification of Inconel SPND, applications, advantages and disadvantages.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Experimental Study on Effect of Wood Ash on Strength of ConcreteIRJET Journal
This study investigated the effect of wood ash as a partial replacement for cement in concrete. Concrete cubes were made with 0%, 10%, 20%, 30%, and 40% replacements of cement with wood ash by weight. The cubes were tested for compressive strength at 7 and 28 days. Results showed that compressive strength initially decreased with higher wood ash content but improved significantly after 28 days. The 20% wood ash mix performed best, showing improvements in compressive strength over normal concrete at 28 days. It was concluded that 20% is the optimum wood ash replacement amount to gain strength benefits while using less cement.
IRJET- Utilization of Bamboo as Reinforcement Steel in Concrete for Sustainab...IRJET Journal
This document discusses utilizing bamboo as a reinforcement material in concrete as a more sustainable and affordable alternative to steel. Some key points:
- Bamboo is a very fast growing grass that is abundant in many tropical and sub-tropical regions. It has high strength and is much cheaper and requires less energy to produce than steel.
- Experiments have shown that some bamboo species have a tensile strength comparable to mild steel. Bamboo also has good compressive strength and buckling resistance.
- For use as concrete reinforcement, bamboo should be properly selected, seasoned, split, treated with waterproofing or CCB to prevent insects, and installed using similar techniques as steel reinforced concrete.
- Using bamboo reinforcement
A Brief Study on the Strength Properties of Concrete Modified with Silica Fum...IRJET Journal
This document presents a study on the strength properties of concrete modified with silica fume aggregates and iron oxide nanoparticles. Various concrete mixes were prepared by replacing coarse aggregates with silica fume aggregates and partially replacing cement with silica fume, slag, and fly ash along with additions of 0-2% iron oxide nanoparticles. The concrete was tested at 28 days for compressive strength, flexural strength, modulus of elasticity, and Mode-II fracture behavior. The results showed that the mix with 11% cement replaced with pozzolans and 1.5% iron oxide nanoparticles exhibited the best performance with 46% higher compressive strength and 33% higher flexural strength compared to normal concrete. The study demonstrated that the use
Aluminium oxide (Alumina)is widely used as protective coating in various application. Optical alumina mainly depends on deposition condition. probe system is used to measure both thickness and optical constant.
This document summarizes a study that evaluated the potential of using textile waste to create sustainable insulation materials. Four nonwoven insulation samples were created from acrylic (A1 and A2) and wool (W1 and W2) textile waste using a needle-punching technique. The samples were tested for their physical and thermal properties. Thermal conductivity ranged from 0.0335 to 0.0350 W/(m K) across the samples. Air permeability was satisfactory at 600-616 L/(m2s) for acrylic and 950-1033 L/(m2s) for wool. Porosity and density were found to influence thermal conductivity and air permeability, with both decreasing with higher porosity
Prediction of Weld Quality of A Tungsten Inertr Gas Welded Mild Steel Pipe Jo...IJERA Editor
The weld quality of tungsten inert gas (TIG) welded joint has been investigated to identify the most economical weld parameters that will bring about optimum properties. Response surface methodology has been used in the optimization of the tungsten inert gas weld of mild steel pipes. Response surface methodology, based on the central composite face centered design was generated for the purpose of optimization of the weld quality.All the process parameters have desirability of 1. Tensile strength response for this solution have a desirability of 0.910595 and the yield strength of 0.59. Result showed that minimizing current and voltage an average tensile strength of 535.452MPa and yield strength of up to 408.74MPa can be achieved, while keeping gas flow rate and electrode diameter within the range of test. It was also deduced that tensile elongation of the TIG weld is not influenced by the process parameters selected for the purpose of this study.
1. Precision forging is a metal shaping process that uses plastic deformation to form parts close to their final dimensions, requiring little to no subsequent machining.
2. It involves refining traditional forging techniques like preheating, descaling, lubrication, and temperature control to achieve close tolerances and surface finishes.
3. Common applications include aircraft, power generation, and automotive components that have high dimensional and quality standards like connecting rods.
IRJET- Importance of Bamboo in Building ConstructionIRJET Journal
This document discusses the importance and uses of bamboo in building construction. It notes that bamboo is a renewable and versatile material that is strong yet lightweight. Bamboo grows very quickly, three times faster than most trees. It has high tensile strength similar to steel. The document outlines how bamboo is used as a building material for walls, floors, roofs, and other structural elements. Bamboo is a low-cost and sustainable alternative to wood and other materials for housing construction.
Impact of Alumina Trihydrate and Silica on Mechanical, Thermal and Electrical...CrimsonPublishersRDMS
Impact of Alumina Trihydrate and Silica on Mechanical, Thermal and Electrical Properties of Silicone Rubber Composites for High Voltage Insulations by Hidayatullah Khan* in Crimson Publishers: Peer Reviewed Material Science Journals
IRJET- Tribological Behavior of Silicon Nitride on Addition of Hexagonal Boro...IRJET Journal
This document summarizes a study on the tribological behavior of silicon nitride composites with the addition of hexagonal boron nitride. Silicon nitride is promising ceramic material for industrial applications requiring high strength and fracture resistance. The addition of hexagonal boron nitride to silicon nitride can decrease the friction coefficient and improve wear resistance. The study used a pin-on-disc tribometer to test silicon nitride composite samples with varying amounts of hexagonal boron nitride, ranging from 4-16% by volume. The results showed that addition of hexagonal boron nitride decreased the friction coefficient and wear rate, with the best performance at 10% hexagonal boron nitride by volume.
Effect of High Temperature on Compressive Strength of ConcreteIOSR Journals
This document summarizes research on the effect of high temperatures on the compressive strength of concrete. Ninety concrete cubes were cast in three grades and subjected to temperatures from 200°C to 800°C for 1-2 hours. Testing found that strength was largely unaffected up to 350°C but started declining at 500°C, with over 30% reduction at 650°C. Beyond 650°C, concrete was largely decimated. Higher exposure times and temperatures led to greater strength reduction. The research adds to understanding concrete performance in fire conditions and suggests serviceability may be maintained up to 500°C but major repair is needed over 650°C.
H.P. fibres are the fibres which have which have high strength, temperature resistance, good flexibility, light weight, fine diameter & durability etc. Qualities are used mainly for technical textile purpose.
Lambourne J_Seaweed as an Insulation - Thesis PresentationJack Lambourne
This document summarizes a research project investigating the potential use of seaweed as a building insulation material. It provides an overview of the background and motivation for the research, methodology, and results. The methodology included harvesting different types of seaweed, performing preliminary testing on fire resistance and porosity, comparing thermal properties to existing insulations using a hot box method, and conducting a life cycle assessment using GaBi software. Key findings from the research included the seaweed materials having fire resistance class B2 or better and U-values between 0.35-0.44 W/m2K when tested in 100mm thick panels, which compared favorably to other natural insulations. The life cycle assessment found the seaweed insulation had lower
Study of mechanical properties of concrete at elevated temperatures a revieweSAT Journals
Abstract Concrete, the second highest consumed material after water in the world, plays a vital role in the construction field because of the versatility in its use. Developments during the last two decades have shown a marked increase in the number of structures involving the long time heating of concrete. In recognition of its importance, many researchers have attempted to investigate the effect of elevated temperature on mechanical properties of concrete. These researchers, during their investigation, used materials with varying combination and different experimental conditions. These materials include cement, different percentages of admixtures like fly ash, silica fume, metakaolin, finely grounded pumice(FGP), group granulated blast furnace slag(GGBS), polypropylene fibre(PP fibre), palm oil fuel ash(POFA), Portland pozzolana cement(PPC), rice husk ash(RHA), different fine and coarse aggregates, super plasticisers, retarders and the conditions included a temperature range of 28oC to 1200oC . The other conditions that were varied are the shapes and sizes of test specimens, curing methods, curing conditions and test methods. The analysis of these investigations and their results are reviewed and presented in this paper. Key words: concrete, mechanical properties, elevated temperature, admixtures, curing methods
Effects Of Indoor Environmental Quality On The Occupants Of Islamic Universit...KHALIL EL KHATEEB
This document summarizes a study on the impact of indoor environmental quality (IEQ) on employees at the Islamic University of Gaza. The study aims to measure levels of carbon monoxide, carbon dioxide, particulate matter and noise, assess thermal comfort, and examine the relationship between IEQ and job satisfaction. Methodology includes literature review, on-site measurements, and distributing questionnaires. Key findings indicate higher than standard levels of carbon dioxide and particulate matter, with natural ventilation performing better than air conditioning. Recommendations include regular monitoring, awareness campaigns, and setting IEQ standards.
Gravity Sand Casting of Metallurgical Bonded Bimetallic Grinding Roll Made of...IJERA Editor
Bimetallic castings are widely used in the mining industries as construction material for crushers which have to perform high abrasive resistance at the outer side and excellent machinability at the inner side. To manufacture bimetallic casting goods cconsecutive centrifugal and gravity casting methods are commonly applied. Centrifugal and consecutive casting come up with geometrical constraints at the parting line of both materials. This research dealed with the manufacturing of tapered grinding roll by applying gravity casting method. The possibilities of casting the white cast iron outer ring in the preheated ductile cast iron of the inner ring were investigated. The inner ring was first heated up by casting liquid metal around the inner side, which prevented the inner ring from cracking due to rapid expansion during the casting process and to provide adequyate shrinkage of inner ring during solidification. After achieving the desired temperature of the inner ring, the liquid metal of white cast iron was then poured into the cavity to form the outer ring. The preheating temperature of the inner ring was mainly derived from the linear thermal expansion of both quasi isotrophic material and the diffusion at the parting line. This preheating temperature has to facilitate the formation of metallurgical bonding and avoid cracks due to the difference of shrinkage value between inner and outer ring. The preheating temperature was set up in the range of 500°C -1000 °C and the flushing time was fixed for 7 seconds. Studies on the microstructure of sample material have revealed a formation of metallurgical bonding at all of the preheating temperature. The width of the diffusion at the interface area varied between 291 µm at 500 oC preheating temperature, 301 µm at 625 oC, 834,8 µm at 750 °C, 909,1 µm at 875 °C and 1027,7 µm at 1000 °C. By preheating temperature of higher than 750°C fusion occured at the interface area between inner and outer material. This research concludes that the casting of bimetallic by applying gravity casting method can be done by preheating the inner ring to 625 oC, interface temperature of 1150 oC, flushing time of 7 seconds and pouring the white cast iron outer ring at the temperature of 1430 oC
IRJET- Partial Replacement of Cement in Concrete with Granite Powder and ...IRJET Journal
This document summarizes a study that partially replaced cement and fine aggregate in concrete with granite powder and saw dust. Concrete cubes were cast with 10%, 20%, and 30% replacement by weight of cement with granite powder and tested for compressive, tensile, and flexural strength at 7, 14, 21, and 28 days. Testing showed that 10% replacement increased strengths compared to 20% and 30% replacement. So partial replacement of locally available granite powder and saw dust can improve concrete properties while reducing costs. The chemical and physical properties of the granite powder and saw dust used in the study are presented along with the testing methodology.
International Journal of Engineering Research and Applications (IJERA) aims to cover the latest outstanding developments in the field of all Engineering Technologies & science.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
Defination of SPND, its charecterstics like mechanical and Nuclear, Technical specification of Inconel SPND, applications, advantages and disadvantages.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Online social network mining current trends and research issueseSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Comparative studies on flotation of kasolite using cationic and anionic surfa...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Stability and surface free energy analysis of a liquid drop on a horizontal c...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Wear behaviour of si c reinforced al6061 alloy metal matrix composites by usi...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
A quantitative risk assessment approach in an integrated cold chain system en...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Realization of high performance run time loadable mips soft-core processoreSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Effect of soft segment chain length on tailoring the propertieseSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Grid fabrication of traffic maintenance system clustering at road junctionseSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Buckling analysis of line continuum with new matrices of stiffness and geometryeSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Design and implementation of network security using genetic algorithmeSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
An analysis of desktop control and information retrieval from the internet us...eSAT Publishing House
This document proposes a system that uses augmented reality and image processing to allow users to control their desktop and retrieve internet information using hand gestures, removing the need for mice and keyboards. It describes a system with two modules - one for desktop control using virtual menus, and one for accessing internet content like news and weather using hand movements. The system works by using a webcam to capture hand movements, processing the images to detect the hand position, and sending commands to the computer based on the position read. It aims to make human-computer interaction more intuitive and realistic through augmented reality.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
1. The document analyzes the flow of molten metal in a die casting process for an aluminum housing component using ProCAST simulation software.
2. The analysis studied air vent placement, filling pressure, solidification times, and temperature distribution to optimize the die design and casting process.
3. The results showed uniform filling at 3 bar pressure, air being vented properly, and solidification occurring in 16 seconds with temperatures above 650°C, indicating good quality parts.
IRJET- Controlling Techniques of Noise Pollution in the Forging IndustryIRJET Journal
This document discusses noise pollution control techniques for a forging industry. It begins by measuring noise levels from various machines like mechanical presses and drop hammers, finding levels from 92-104 dB, above safety limits. It then describes several noise control methods like equipment modifications, administrative controls, shields/barriers, enclosures, curtains, and louvers. The goal is to reduce worker exposure to hazardous noise levels through engineering and process changes.
IRJET- A Review Paper on Light Weight Autoclave Aerated Concrete BlockIRJET Journal
This document provides a review of light weight autoclave aerated concrete blocks. It discusses the manufacturing process, which involves mixing raw materials like cement, water, fly ash, lime, and aluminum powder. The mixture is cured in an autoclave under high temperature and pressure to produce lightweight blocks containing 50-60% air. Tests showed the blocks have low water absorption, compressive strength of 3.78 N/mm2, and flexural strength of 0.69 N/mm2. AAC blocks offer benefits like lighter weight, lower costs, better seismic and fire performance than clay bricks. The document concludes AAC is a sustainable and eco-friendly building material.
Aerocon Panels: An Alternative Building Walling Solution for the Modern AgeIRJET Journal
The document discusses Aerocon panels, which are a type of prefabricated wall panel made of cement composites that provide an alternative building material to traditional brick and mortar. Some key advantages of Aerocon panels include being eco-friendly since they use industrial waste like fly ash, providing faster construction since they do not require on-site plastering and curing, and having improved insulation. Aerocon panels are lightweight, fire resistant, and suitable for seismic or cyclone-prone areas. The document outlines the manufacturing process of Aerocon panels and provides details on their applications, sizes available, installation process, and compares their properties to traditional brick walls.
IRJET- Translucent Light Weight Concrete Blocks for Green BuildingsIRJET Journal
1. Translucent lightweight concrete blocks were developed using plastic optical fibers and aluminum powder to transmit light while maintaining structural strength.
2. Compression strength and light transmission tests on the blocks showed the compressive strength was reduced with increased aluminum powder content due to lower density, with an optimum of 2% aluminum powder achieving a strength of 8.02 MPa.
3. Light transmission tests found the blocks transmitted up to 3% of incoming light, varying by direction, and were capable of illuminating an interior space, making translucent concrete a potential building material for green buildings.
EXPERIMENTAL STUDY ON THE PERFORMANCE OF HYBRID FIBRE REINFORCED CONCRETE AT ...AM Publications
The main objective of this study is to understand the fundamental behaviour of FRC when it is exposed to elevated temperatures. However, rather than relying on one type of fibre, this study proposed of mixing two different types of fibre in concrete which will then be exposed to elevated temperatures from normal temperature i.e. 27 °C (room temperature) to 200°C, 400 °C and 600 °C for one hour and cooled to room temperature before testing. The two types of fibres used, steel and Recron 3s (polyester) fibres, have different characteristics. The study is mainly focused on the experimental work. Concrete mixes prepared are without fibre, with either or both steel fibre and Recron 3s fibres. Dosage of steel fibre is 1% by volume of concrete and Recron 0.1% by volume of concrete. The study deals with the comparison of residual strength of hybrid fibre reinforced concrete with fibre reinforced concrete. Experimental work was carried out to study the impact of elevated temperatures on the compressive strength, tensile strength and ultrasonic pulse velocity.
Wood ash as an effective raw material for concrete blockseSAT Journals
This document summarizes a study on using wood ash as a partial replacement for cement in manufacturing concrete blocks. Concrete blocks were produced with 0%, 10%, 15%, 20%, and 25% replacements of cement with wood ash. The blocks were then tested for compressive strength, water absorption, and heat release at 7, 14, and 21 days. Compressive strength was highest for blocks with 15% wood ash replacement. Water absorption was lowest for 15% replacement blocks. Heat release was slowest for 15% and 20% replacement blocks. The study concluded that replacing 15% of cement with wood ash produced blocks that met strength standards and had benefits of lower water absorption and slower heat release.
Thermal performance & fire resistance of autoclaved aerated concrete exposed ...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Thermal performance & fire resistance of autoclaved aerated concrete expo...eSAT Journals
Abstract Autoclaved Aerated Concrete (AAC) is also being produced for many years, there are still some points that need to be clarified. One of these points needs to know is humidity intrusion effects on AAC members in areas with high relative humidity levels of Mediterranean climates which are important in durability and insulation properties of AAC. Therefore, some tests on mechanical and physical properties of ACC concrete carried out. These include thermal insulation and fire resistance tests under different level of humidity ACC blocks. According to the test results; increasing in humidity condition inside the chamber during heating procedure under steady state condition, caused increasing in average temperature change on outside surface of AAC wall. AAC losses its mass and mechanical properties subjected to the high elevated temperature above 500°C. Keywords: Thermal performance, AAC, fire resistance test, humidity
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
International Journal of Engineering Research and Development (IJERD)IJERD Editor
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IRJET- Performance Analysis of Translucent Cement Mortar BlockIRJET Journal
The document presents research on the performance analysis of translucent cement mortar blocks, which are constructed with varying percentages of optical fibers embedded in cement mortar to transmit light. Testing showed that compressive strength and light transmittance increased with fiber percentage up to 1%, and the blocks provide aesthetic and energy benefits compared to normal blocks while maintaining sufficient strength. The blocks have potential applications in green buildings by reducing lighting energy usage through natural light transmission.
Experimental investigation on behavior of bamboo reinforced concrete membereSAT Journals
Abstract The use of bamboo which is fast growing and ecologically friendly material for structural applications is being considered as quite appropriate. The tensile strength of bamboo is quite high and can reach up to 125 MPa. This makes bamboo an pretty alternative to steel in tensile loading applications. The bamboo concrete composite elements can be used as alternate for concrete, steel and wood used in housing and other products required in the day to day applications. In this study it has been attempted to develop engineered bamboo structural elements for use in low cost housing. A bending test was performed on Plain, Steel & Bamboo reinforced members. For example, a total of 4beam (150x150x700mm) were casted using design mix (M25) as per IS code. These beam included 1 beam of steel reinforcement, 1beam of plain concrete, and 4beam of untreated bamboo reinforcement. The load-deformation curves displayed significant nonlinearity, representing that the bamboo has the capacity to absorb energy. Bamboo concrete composite structural members can provide tailored solutions to the eco-housing initiatives at cheaper costs. The results obtained accrue the advantage obtained by the composite members when compared to standard reinforced concrete and plain concrete. Keywords: UTM, Composite Member, Bamboo Reinforced Concrete, Experimental Investigation, Tensile Strength
Experimental investigation on behavior of bamboo reinforced concrete membereSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Abstract Chimneys are very important structures for the emission of poisonous gases in power plants. After realising the urgent need to
restrict the pollution levels, chimney height is being rapidly increased. So most of the chimneys are tall slender structures which
fail due to wind excitation The present study discusses the dynamic behaviour of tall chimneys. Reinforced concrete chimney of
275m high, which is located in warora, Maharastra is taken for the present study. The objective of this project is to study the
change in the stress pattern due to presence of flue holes and also to carry out the influence of along wind and across wind effects
on the height of chimney for different wind speed and location. The analyse of chimney is carried out by developing a three
dimensional model created with plate elements using STADD Pro. The stress concentrations in the flue duct in the chimney have
been studied.
Keywords: Tall Slender, Warora, Maharastra, Flue Holes, STADD Pro, Stress Concentration
Study on Mechanical Properties of Light Transmitting ConcreteIRJET Journal
This document presents a study on the mechanical properties of light transmitting concrete. Light transmitting concrete is produced by embedding plastic optical fibers in concrete mixtures. The researchers prepared light transmitting concrete blocks of size 200x100x100 mm containing 2% and 4% plastic optical fibers by volume. Different fiber configurations were tested to determine the optimum fiber arrangement. The compressive strength of the blocks was tested at 7, 14, and 28 days and compared to normal concrete blocks. The 4% fiber mixture with a water-cement ratio of 0.5 showed the highest compressive strength. Prisms of size 50x10x10 cm containing mesh, fibers or both were also tested to study flexural strength and crack patterns at 7 and 28 days
Experimental study of gas flux characteristics in a co2 selective silica base...IAEME Publication
1. The document describes an experimental study of gas flux characteristics in a CO2 selective silica-based ceramic membrane.
2. A fresh ceramic membrane was prepared using a sol-gel dip coating technique and tested for separating CO2, O2, CH4, and N2 gases.
3. Results showed the membrane had high CO2 flux and CO2/N2 selectivity, confirming its potential for CO2 capture from flue gases. The gas flux increased linearly with pressure.
IRJET- Structural Health Monitoring of Glass Fibre Reinforced Concrete BeamIRJET Journal
This document summarizes a study on monitoring the structural health of a glass fibre reinforced concrete beam using thermocouple sensors. Glass fibre mesh was used to reinforce concrete prisms instead of steel reinforcement. Thermocouple sensors embedded in the prisms measured the internal temperature at different loads. A relationship was derived between internal temperature and applied load. The temperature increased by 0.2°C for every load change. The study concluded that temperature monitoring can provide a warning of damage as temperature rises with increasing loads. Further research is needed to develop a more economical health monitoring system using thermocouple sensors.
Physical and mechanical properties of concrete containing fibers from industr...eSAT Journals
Abstract Fiber reinforcement can effectively improve the mechanical properties of concrete. Utilization of recycled fibers from post-consumer and industrial waste offer some benefits such as waste reduction and resource conservation and also low-cost materials and reduced need for landfilling. Carpets are one of the major components of waste materials around the world, which is 1-2% of all solid wastes by volume. Industrial carpets are mainly made of polymeric materials such as Nylon and Polypropylene fibers. This study was carried out on different tests of the concrete containing fibers from Malaysian industrial carpet waste following the DOE mix design for the investigation of the physical and mechanical properties of concrete. Compressive, splitting tensile and flexural tests were performed with a fiber volume fraction range of 0.5-2%. A decrease in compressive strength and workability was observed as a function of carpet fiber content. However, the addition of carpet fiber leads to enhance the splitting tensile strength, flexural strength and reducing the crack-size and a smoother mode of failure, unlike the brittle failure behavior of plain concrete. Index Terms: Recycled fiber, Carpet waste, Fiber reinforced concrete, Physical and mechanical properties
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
This document discusses self-compacting concrete (SCC), which is a type of concrete that can flow and consolidate under its own weight without any external vibration. SCC has advantages over traditional vibrated concrete such as easier placement in complex forms, reduced noise pollution, and improved surface finish. The key properties of SCC include high flowability, passing ability, and segregation resistance. These properties are achieved through optimizing the mix design, including using a high range of superplasticizer, limiting coarse aggregate content, increasing fine particles and viscosity modifying agents. SCC has applications in structures with dense reinforcement like the Burj Khalifa where it simplified construction. The document also discusses experimental investigations into the compressive strength of SCC exposed to
Similar to Humidity intrusion effects on the properties of sound (20)
Hudhud cyclone caused extensive damage in Visakhapatnam, India in October 2014, especially to tree cover. This will likely impact the local environment in several ways: increased air pollution as trees absorb less; higher temperatures without tree canopy; increased erosion and landslides. It also created large amounts of waste from destroyed trees. Proper management of solid waste is needed to prevent disease spread. Suggested measures include restoring damaged plants, building fountains to reduce heat, mandating light-colored buildings, improving waste management, and educating public on health risks. Overall, changes are needed to water, land, and waste practices to rebuild the environment after the cyclone removed green cover.
Impact of flood disaster in a drought prone area – case study of alampur vill...eSAT Publishing House
1) In September-October 2009, unprecedented heavy rainfall and dam releases caused widespread flooding in Alampur village in Mahabub Nagar district, a historically drought-prone area.
2) The flood damaged or destroyed homes, buildings, infrastructure, crops, and documents. It displaced many residents and cut off the village.
3) The socioeconomic conditions and mud-based construction of homes in the village exacerbated the flood's impacts, making damage more severe and recovery more difficult.
The document summarizes the Hudhud cyclone that struck Visakhapatnam, India in October 2014. It describes the cyclone's formation, rapid intensification to winds of 175 km/h, and landfall near Visakhapatnam. The cyclone caused extensive damage estimated at over $1 billion and at least 109 deaths in India and Nepal. Infrastructure like buildings, bridges, and power lines were destroyed. Crops and fishing boats were also damaged. The document then discusses coping strategies and improvements needed to disaster management plans to better prepare for future cyclones.
Groundwater investigation using geophysical methods a case study of pydibhim...eSAT Publishing House
This document summarizes the results of a geophysical investigation using vertical electrical sounding (VES) methods at 13 locations around an industrial area in India. The VES data was interpreted to generate geo-electric sections and pseudo-sections showing subsurface resistivity variations. Three main layers were typically identified - a high resistivity topsoil, a weathered middle layer, and a basement rock. Pseudo-sections revealed relatively more weathered areas in the northwest and southwest. Resistivity sections helped identify zones of possible high groundwater potential based on low resistivity anomalies sandwiched between more resistive layers. The study concluded the electrical resistivity method was useful for understanding subsurface geology and identifying areas prospective for groundwater exploration.
Flood related disasters concerned to urban flooding in bangalore, indiaeSAT Publishing House
1. The document discusses urban flooding in Bangalore, India. It describes how factors like heavy rainfall, population growth, and improper land use have contributed to increased flooding in the city.
2. Flooding events in 2013 are analyzed in detail. A November rainfall caused runoff six times higher than the drainage capacity, inundating low-lying residential areas.
3. Impacts of urban flooding include disrupted daily life, damaged infrastructure, and decreased economic activity in affected areas. The document calls for improved flood management strategies to better mitigate urban flooding risks in Bangalore.
Enhancing post disaster recovery by optimal infrastructure capacity buildingeSAT Publishing House
This document discusses enhancing post-disaster recovery through optimal infrastructure capacity building. It presents a model to minimize the cost of meeting demand using auxiliary capacities when disaster damages infrastructure. The model uses genetic algorithms to select optimal capacity combinations. The document reviews how infrastructure provides vital services supporting recovery activities and discusses classifying infrastructure into six types. When disaster reduces infrastructure services, a gap forms between community demands and available support, hindering recovery. The proposed research aims to identify this gap and optimize capacity selection to fill it cost-effectively.
Effect of lintel and lintel band on the global performance of reinforced conc...eSAT Publishing House
This document analyzes the effect of lintels and lintel bands on the seismic performance of reinforced concrete masonry infilled frames through non-linear static pushover analysis. Four frame models are considered: a frame with a full masonry infill wall; a frame with a central opening but no lintel/band; a frame with a lintel above the opening; and a frame with a lintel band above the opening. The results show that the full infill wall model has 27% higher stiffness and 32% higher strength than the model with just an opening. Models with lintels or lintel bands have slightly higher strength and stiffness than the model with just an opening. The document concludes lintels and lintel
Wind damage to trees in the gitam university campus at visakhapatnam by cyclo...eSAT Publishing House
1) A cyclone with wind speeds of 175-200 kph caused massive damage to the green cover of Gitam University campus in Visakhapatnam, India. Thousands of trees were uprooted or damaged.
2) A study assessed different types of damage to trees from the cyclone, including defoliation, salt spray damage, damage to stems/branches, and uprooting. Certain tree species were more vulnerable than others.
3) The results of the study can help in selecting more wind-resistant tree species for future planting and reducing damage from future storms.
Wind damage to buildings, infrastrucuture and landscape elements along the be...eSAT Publishing House
1) A visual study was conducted to assess wind damage from Cyclone Hudhud along the 27km Visakha-Bheemli Beach road in Visakhapatnam, India.
2) Residential and commercial buildings suffered extensive roof damage, while glass facades on hotels and restaurants were shattered. Infrastructure like electricity poles and bus shelters were destroyed.
3) Landscape elements faced damage, including collapsed trees that damaged pavements, and debris in parks. The cyclone wiped out over half the city's green cover and caused beach erosion around protected areas.
1) The document reviews factors that influence the shear strength of reinforced concrete deep beams, including compressive strength of concrete, percentage of tension reinforcement, vertical and horizontal web reinforcement, aggregate interlock, shear span-to-depth ratio, loading distribution, side cover, and beam depth.
2) It finds that compressive strength of concrete, tension reinforcement percentage, and web reinforcement all increase shear strength, while shear strength decreases as shear span-to-depth ratio increases.
3) The distribution and amount of vertical and horizontal web reinforcement also affects shear strength, but closely spaced stirrups do not necessarily enhance capacity or performance.
Role of voluntary teams of professional engineers in dissater management – ex...eSAT Publishing House
1) A team of 17 professional engineers from various disciplines called the "Griha Seva" team volunteered after the 2001 Gujarat earthquake to provide technical assistance.
2) The team conducted site visits, assessments, testing and recommended retrofitting strategies for damaged structures in Bhuj and Ahmedabad. They were able to fully assess and retrofit 20 buildings in Ahmedabad.
3) Factors observed that exacerbated the earthquake's impacts included unplanned construction, non-engineered buildings, improper prior retrofitting, and defective materials and workmanship. The professional engineers' technical expertise was crucial for effective post-disaster management.
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Humidity intrusion effects on the properties of sound
1. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 03 Issue: 02 | Feb-2014, Available @ http://www.ijret.org 6
HUMIDITY INTRUSION EFFECTS ON THE PROPERTIES OF SOUND
ACOUSTIC OF AUTOCLAVED AERATED CONCRETE
Abdullah Keyvani1
, Sasan Somi2
, Özgür Eren3
1
Assistant Professor, Azarbaijan Shahid Madani University, Iran
2
Graduated Student, 3
Associate Professor, Eastern Mediterranean University, Cyprus
Abstract
Autoclaved Aerated Concrete (AAC) has been commonly known to exhibit favorable thermal properties, high fire resistance and high
compressive resistance at relatively low density. However, little attention has been devoted to the sound insulation performance of
AAC. One of the points needs to know is humidity intrusion effects on AAC members in areas with high relative humidity levels of
Mediterranean climates which are important in durability and insulation properties of AAC. Tests on mechanical and physical
properties of ACC carried out to study humidity intrusion effects on AAC members were studied with and w/o coatings on the
surfaces. From the findings of this study, physical and mechanical autoclaved aerated concrete evaluated in three different humidity
levels to compare the effect of humidity on properties of AAC. According to test results coating is the most important factor for
improving resistivity of AAC walls, and these factors help AAC walls to keep their mechanical and physical properties against
humidity. With its closed air pockets, AAC can provide very good sound insulation. This paper presents the results of studies on
acoustic properties of AAC partitions aimed at identifying the effect of specific factors on AAC sound insulation performance.
Keywords: AAC, concrete, humidity, sound acoustic, decibel
-----------------------------------------------------------------------***-----------------------------------------------------------------------
1. INTRODUCTION
Autoclaved aerated concrete (AAC) offers specific favorable
properties in the context of sustainable development in the
construction industry. AAC production technologies are
energy-efficient and consume low quantities of raw materials
as compared to the production of other construction materials,
which can be attributed to low density and a special waste-free
and environmental friendly production formula of AAC, [1].
Typical AAC density is between 300 and 1,000 kg/m3 (in a
dry condition). Aerated concrete has no coarse aggregates in
its mixture, and it can be mentioned that aerated lightweight
concrete is the concrete mortar which is aerated with fine and
small bubbles from a chemical process or by using air
entraining agent. Autoclaved aerated concrete is made of
cement, silica sand, quick lime & gypsum and aluminum
powder [2].
The positive acoustic properties of autoclaved aerated concrete
as such can be attributed to its internal structure, however, its
density is relatively low, which is why the sound insulation
performance of AAC partitions can be worse than that of walls
of the same thickness made of other materials (e.g. normal
concrete, etc.) [3].
Sound insulation requirements for internal and external walls
differ considerably and depend on the location and intended
use of the buildings and of the building interiors. Therefore,
these diverse requirements must be taken into consideration in
the evaluation of sound insulation performance of AAC walls.
Sound insulation performance of single-leaf walls made of
aerated concrete can be considered sufficient in a number of
applications. In exceptional circumstances, when special
requirements on sound insulation performance, special
materials and structural solutions need to be applied which
exhibit better acoustic properties. This problem can be only
solved by conducting suitable tests.
In the period 1990-2010, the studies on the development of
improved acoustic properties have been considerably
intensified [4, 5]. This study is based on evaluating humidity
intrusion effects on the sound acoustic properties of AAC.
2. EXPERIMENTAL PROCEDURE
Experiments were carried out in order to investigate sound
acoustic and humidity intrusion effects. This section includes
briefly descriptions about experimental procedure of tests
which were carried out according to TS pr EN [6] and ASTM
[7].
2.1 Sound Acoustic Test
Sound acoustic tests were carried out for evaluating acoustic
properties of AAC panels under three different humidity
conditions. For these tests, special chamber made of
galvanized steel plates with dimensions of 700×850×600 mm.
Distance between the two steel panels of chamber was filled
with lightweight material and gypsum mortar to increase its
insulation capacity.
2. IJRET: International Journal of Research in Engineering and Technology
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Fig-1: Outside view of the sound test chamber
Sound level meter with accuracy of 0.1 db was used to
measure frequency of sound at both inside and outside of
chamber. A humidity meter was used to measure the humidity
level inside the chamber. Speakers were used to produce
sound inside the chamber which was connected to a computer
for sound production with homogenous frequency. Plastic
funnel was used to focus exited noise and reduce
environments disturbing noises which cause faults in
measurements.
Fig-2: Set up of apparatus inside of the chamber
Measuring sound levels inside the chamber was the first step
of test and a digital camera with flashlight was used inside the
chamber to record data from sound level meter. Different
sound levels were set from computer and ten levels were
inserted in the chamber changing from 55.4 dB up to 87.5 dB.
Sound levels were measured outside and inside of AAC wall
to determine loss of sound transmission.
Sound acoustic tests were carried out in two important cases
for targets of this research:
1) Three different humidity conditions were set for AAC
walls. Different humidity conditions in the chamber were
created by using a vaporizer apparatus.
IJRET: International Journal of Research in Engineering and Technology eISSN: 2319
_______________________________________________________________________________________
2014, Available @ http://www.ijret.org
Outside view of the sound test chamber
Sound level meter with accuracy of 0.1 db was used to
measure frequency of sound at both inside and outside of
chamber. A humidity meter was used to measure the humidity
chamber. Speakers were used to produce
sound inside the chamber which was connected to a computer
for sound production with homogenous frequency. Plastic
funnel was used to focus exited noise and reduce
environments disturbing noises which cause faults in the
Set up of apparatus inside of the chamber
Measuring sound levels inside the chamber was the first step
of test and a digital camera with flashlight was used inside the
chamber to record data from sound level meter. Different
ound levels were set from computer and ten levels were
inserted in the chamber changing from 55.4 dB up to 87.5 dB.
Sound levels were measured outside and inside of AAC wall
two important cases
1) Three different humidity conditions were set for AAC
walls. Different humidity conditions in the chamber were
2) Effect of coating on acoustic properties of AAC w
studied with a gypsum coating with a thickness of 10 mm.
Fig-3: Sound level measuring test process
3. RESULTS AND DISCUSSION
Sound insulation tests were carried out on AAC panels under
three different humidity conditions to determine effects
humidity on acoustic properties of AAC. Measuring sound
transition loss (TL) was the main pur
test.
Although density and stiffness are the most important factors
affecting sound transmission losses of partitions and floors,
humidity can also be a factor which can affect sound
transmission. According to technical report CBD
double layer assembly, such as gypsum wallboard on wood or
metal framing, the depth of air spaces, the presence or absence
of sound absorbing material, and the degree of mechanical
coupling between layers critically affect sound transmission
losses and the sound transmission
Fig-4: Sound transmission loss at 55% humidity condition for
AAC panel without coating
0
10
20
30
40
50
60
70
80
90
100
1 2 3
SoundLevel
eISSN: 2319-1163 | pISSN: 2321-7308
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7
2) Effect of coating on acoustic properties of AAC walls was
studied with a gypsum coating with a thickness of 10 mm.
Sound level measuring test process
RESULTS AND DISCUSSION
Sound insulation tests were carried out on AAC panels under
three different humidity conditions to determine effects of
humidity on acoustic properties of AAC. Measuring sound
transition loss (TL) was the main purpose of sound insulation
Although density and stiffness are the most important factors
affecting sound transmission losses of partitions and floors,
humidity can also be a factor which can affect sound
transmission. According to technical report CBD-239, “in a
y, such as gypsum wallboard on wood or
metal framing, the depth of air spaces, the presence or absence
of sound absorbing material, and the degree of mechanical
coupling between layers critically affect sound transmission
losses and the sound transmission class (STC)” [8].
Sound transmission loss at 55% humidity condition for
AAC panel without coating
4 5 6 7 8 9 10
Number of tests
Inside Sound level
Outside Sound level
3. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
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Volume: 03 Issue: 02 | Feb-2014, Available @ http://www.ijret.org 8
Fig-5: Sound level transmission loss at 55% humidity
condition for AAC wall with coating
AAC wall with 55% humidity level without coating were
tested from 55.4 dB to 87.6 dB. Results obtained for sound
insulation test on AAC wall without coating shows; sound
levels outside the chamber were reduced by 41.08%
comparing to sound levels inside of it. In the same test
conditions results obtained for AAC wall with gypsum coating
in 55% humidity condition shows 48.88% sound transmission
loss. When inside humidity condition was about 75%, sound
levels outside the chamber were measured for AAC wall
without coating to determine effect of humidity condition on
sound transmission loss of AAC.
Fig-6: Sound transmission loss at 75% humidity condition for
AAC wall without coating
Fig-7: Sound transmission loss at 75% humidity condition for
AAC wall with coating
At 75% humidity condition, sound levels inside the chamber
were tested from 55.4 dB to 87.6 dB. According to the results,
sound levels outside the chamber were reduced compared to
inside sound levels with average percentage of about 39.74%
by using AAC wall without coating. After applying gypsum
coating on AAC wall, an average sound transmission loss of
47.46% was obtained for the same sound levels inside the
chamber which were used in pervious tests. With increasing
humidity condition inside the chamber up to 100%, sound
levels outside the chamber were reduced compared to inside
sound level with average percentage of about 37.28% by using
AAC wall without coating. With applying gypsum coating on
AAC wall an average sound transmission loss of 46.02% was
obtained for the same sound levels inside the chamber which
were used in pervious tests.
Fig-8: Sound transmission loss in 100% humidity condition
for AAC wall without coating
0
10
20
30
40
50
60
70
80
90
100
1 2 3 4 5 6 7 8 9 10
Soundlevel(db)
Number of tests
Inside Sound level
Outside Sound level
0
10
20
30
40
50
60
70
80
90
100
1 2 3 4 5 6 7 8 9 10
SoundLevel
Number of tests
Inside Sound level
Outside Sound level
0
10
20
30
40
50
60
70
80
90
100
1 2 3 4 5 6 7 8 9 10
Soundlevel(db)
Number of tests
Inside Sound level
Outside Sound level
0
10
20
30
40
50
60
70
80
90
100
1 2 3 4 5 6 7 8 9 10
SoundLevel
Number of tests
Inside Sound level
Outside Sound level
4. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 03 Issue: 02 | Feb-2014, Available @ http://www.ijret.org 9
Fig-9: Sound transmission loss in 100% humidity condition
for AAC wall with coating
According to test results, average sound transmission losses of
37.28% to 48.88% were obtained by using AAC wall in
different humidity conditions of 50% to 100%, respectively.
Test results indicated that humidity has intrusion effect on
sound transmission of AAC walls.
Sound waves travel faster in dry air than moist air, because
dry air is more dense than humid air and air molecules have
higher mass than average water molecules. This effect of
humidity on sound speed caused decreasing in sound
transmission loss of AAC walls. To counteract this effect,
gypsum coating was used. Results showed that humidity was
less effective on the acoustic properties of AAC wall with
coating and effect of gypsum coating in sound transmission
loss was about 10% on average.
Since AAC is lightweight material with porous structure both
coating and non-coating have beneficial effects on sound
transmission loss because of increasing in air flow resistivity
[8].
Results indicated that for different sound levels, sound
transmission losses change parallel to sound levels inside the
chamber and it is understandable that there is no resonance in
acoustic properties of AAC walls.
Fig-10: Effect of humidity on outside sound levels for AAC
wall without coating
As indicated the plaster on aerated concrete walls with tongue
and groove joints has specific sound insulating properties.
Aerated concrete was also confirmed to transmit sound, even
at higher densities, which means that the sound insulation
performance of plaster-free walls is lower than that of
plastered brickwork, even when the joints are filled with
mortar. The difference in the values of sound reduction indices
is considerably higher than what would be implied by the
increased surface density (mass per unit area) of the plastered
wall.
Fig-11: Effect of humidity on outside sound levels for AAC
wall with coating
0
10
20
30
40
50
60
70
80
90
100
1 2 3 4 5 6 7 8 9 10
Soundlevel(db)
Number of tests
Inside Sound level
Outside Sound level
34
39
44
49
54
55 75 100
avarageofoutsidesoundlevel(db)
inside humidity (%)
34
39
44
49
54
55 75 100
avarageofoutsidesoundlevel(db)
Inside humidty (%)
5. IJRET: International Journal of Research in Engineering and Technology
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Volume: 03 Issue: 02 | Feb-2014, Available @
Fig-12: Effect of coating in decreasing sound levels
Fig--13: Measured sound from the outside of AAC panel by
sound level meter
The results of laboratory tests can be only used in preliminary
assessment of sound reduction performance of walls made of
aerated concrete in relation to acoustic requirements for
partitions. Sound insulating performance to a large extent
depends on structural solutions used in the construction of
internal and external walls, in consideration of sound
propagation principles within buildings. Moreover, the
workmanship quality of structural solutions is equally
important from the viewpoint of sound reduction properties. It
would be also advisable to continue to investigate the sound
reduction properties of innovative structural solutions which
34
39
44
49
54
55 75
without coating
with coating
avrageofoutsidesoundlevel(db)
Inside humidity (%
IJRET: International Journal of Research in Engineering and Technology eISSN: 2319
_______________________________________________________________________________________
2014, Available @ http://www.ijret.org
Effect of coating in decreasing sound levels
Measured sound from the outside of AAC panel by
The results of laboratory tests can be only used in preliminary
assessment of sound reduction performance of walls made of
aerated concrete in relation to acoustic requirements for
ons. Sound insulating performance to a large extent
depends on structural solutions used in the construction of
internal and external walls, in consideration of sound
propagation principles within buildings. Moreover, the
solutions is equally
important from the viewpoint of sound reduction properties. It
would be also advisable to continue to investigate the sound
reduction properties of innovative structural solutions which
have the potential to improve the insulating prop
walls.
CONCLUSIONS
Results indicated that increasing humidity condition inside the
chamber causes reductions in average sound transmission
losses of AAC wall. Also for different sound levels, sound
transmission losses change parallel to
chamber and it is understandable that there is no resonance in
acoustic properties of AAC walls.
Considering advantages of AAC in energy savings and cost
effectiveness are beneficial to find the way for counteract
humidity intrusion effects on AAC’s physical and mechanical
properties. According to test results coating is the most
important factor for improving resistivity of AAC walls, and
these factors help AAC walls to keep their mechanical and
physical properties against humidity
With its closed air pockets, AAC can provide very good sound
insulation. As with all masonry construction, care must be
taken to avoid gaps and unfilled joints that can allow
unwanted sound transmission. Combining the AAC wall with
an insulated asymmetric cavity system will provide a wall
with excellent sound insulation properties
REFERENCES
[1]. Zapotoczna-Sytek G., Malolepszy J. (2008),
Zrównowawony Rozwój, A Process Wytwarzania I
Stosowania Elementówz Betonu Komórkowego, Dni Betonu
Tradycja I Nowoczesnosc, Wyd. Polski Cement, Kraków,
867-878.
[2]. PN-EN 771-4:2004/A1 (2006), Specification for Masonry
Units, Autoclaved Aerated Concrete Masonry Units.
[3]. PN-B-02151-3 (1999), Building Acoustics
Protection of Apartments in Buildings
Buildings And of Building Elements
[4]. ISO EN 717-1 (1995), Acoustics
Insulation in Buildings and Building Elements
Airborne Sound Insulation.
[5]. Narayanan N. and Ramamurthy K. (2000), Structure a
Properties of Aerated Concrete. Building Technology and
Construction Management Division, Madras: Department of
Civil Engineering, Indian Institute of Technology.
[6]. Wittman. F. H. (1992) Advances in Autoclaved Aerated
Concrete. Zurich: Swiss Federal Institute of Technology, P.
21.
[7]. TS EN 679 Gazbeton
Determination of the compressive strength of autoclaved
aerated concrete
[8]. TS pr EN 1353, Gaz ve Kopuk Beton Rutubet Muhtevasi
Tayini, Determination of Moisture Content of Autoclaved
Aerated Concrete
[9]. Warnock. A.C.C. (1985), Fundamentals of Building
Acoustics, Canadian Building Digest, p. 236
100
without coating
with coating
%)
eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
10
have the potential to improve the insulating properties of AAC
Results indicated that increasing humidity condition inside the
chamber causes reductions in average sound transmission
losses of AAC wall. Also for different sound levels, sound
transmission losses change parallel to sound levels inside the
chamber and it is understandable that there is no resonance in
acoustic properties of AAC walls.
Considering advantages of AAC in energy savings and cost
effectiveness are beneficial to find the way for counteract
n effects on AAC’s physical and mechanical
properties. According to test results coating is the most
important factor for improving resistivity of AAC walls, and
these factors help AAC walls to keep their mechanical and
physical properties against humidity.
With its closed air pockets, AAC can provide very good sound
insulation. As with all masonry construction, care must be
taken to avoid gaps and unfilled joints that can allow
unwanted sound transmission. Combining the AAC wall with
ric cavity system will provide a wall
with excellent sound insulation properties
Sytek G., Malolepszy J. (2008),
Zrównowawony Rozwój, A Process Wytwarzania I
Stosowania Elementówz Betonu Komórkowego, Dni Betonu –
czesnosc, Wyd. Polski Cement, Kraków,
4:2004/A1 (2006), Specification for Masonry
Units, Autoclaved Aerated Concrete Masonry Units.
3 (1999), Building Acoustics – Noise
Protection of Apartments in Buildings - Sound Insulation in
Buildings And of Building Elements - Requirements.
1 (1995), Acoustics – Rating of Sound
Insulation in Buildings and Building Elements – Part 1:
Airborne Sound Insulation.
Narayanan N. and Ramamurthy K. (2000), Structure and
Properties of Aerated Concrete. Building Technology and
Construction Management Division, Madras: Department of
Civil Engineering, Indian Institute of Technology.
Wittman. F. H. (1992) Advances in Autoclaved Aerated
Concrete. Zurich: Swiss Federal Institute of Technology, P.
TS EN 679 Gazbeton - Basınç Dayanımı Tayini,
of the compressive strength of autoclaved
1353, Gaz ve Kopuk Beton Rutubet Muhtevasi
Tayini, Determination of Moisture Content of Autoclaved
Warnock. A.C.C. (1985), Fundamentals of Building
Canadian Building Digest, p. 236.
6. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 03 Issue: 02 | Feb-2014, Available @ http://www.ijret.org 11
[10]. Sasan Somi, (2011), Humidity Intrusion Effects on
Properties of Autoclaved Aerated Concrete, M.Sc. Thesis,
Eastern Mediterranean University, Gazimağusa, North
Cyprus.
BIOGRAPHIES
Dr. Eng. Abdullah KEYVANI received the
Ph.D. degree from University of Hokkaido in
Japan, in Civil Engineering in 1998.
Currently, he is Assistant Professor of Civil
Engineering at Azarbaijan Shahid Madani
University in Tabriz, Iran and teaches
Advanced Concrete Structures, Design of
Concrete Structures and Concrete Technology & Laboratory.
He is also a Senior Consultant Engineer of the East Azarbaijan
Regional Water Corporation. His research interests are in the
area of Design, Construction and Quality Control of
Reinforced Concrete Hydro Structures.
Sasan SOMI is a civil engineer and was
graduated in Master of Science in Civil
Engineering from Eastern Mediterranean
University in 2011, North Cyprus. He
currently works as a supervisor engineer in a
construction company of underground line of
Tabriz city in Iran.
Professor Özgür EREN is chair of Civil
Engineering Department in Eastern
Mediterranean University in North Cyprus. He
currently teaches various Concrete courses and
supervisor of many Ph.D and MSc. Students.