This document discusses the evolution of physico-mechanical properties of calcined clay cement from different sources of kaolin clay. It produced limestone calcined clay cement (LC3) using two different calcined clays obtained from kaolin in Zafarana and Sinai, Egypt at replacement levels of 10-30% along with 10% limestone filler and 5% gypsum. The LC3 pastes were characterized through water consistency, setting times, compressive strength, XRD, TG and DTA. The results showed the LC3 formed from the two calcined clays performed better than ordinary Portland cement, especially in durability. The study concluded calcined clay with low metakaolin content can achieve similar
This document summarizes a research study on the effect of using electrically precipitated fly ash (EPFA) as a partial replacement for cement in self-compacting concrete (SCC). The study tested SCC mixes with 0-30% EPFA replacement at 5% intervals. Tests were conducted on fresh properties, mechanical properties like compressive strength, and durability properties like rapid chloride permeability and water sorptivity. Results showed that 20% EPFA replacement provided better results than the control SCC mix, improving properties while also providing economic and environmental benefits through reduced cement usage.
Study of Mechanical Properties in SCC by Blending Cement Partially With Fly A...IJSRD
The development of self-compacting concrete has been one of the most important materials in the modern building industry. The purpose of this concrete concept is to decrease the risk due to human factor. The use of SCC is spreading worldwide because of its very attractive properties. In the present investigation Blended SCC is the one in which some percentage of cement content used for the concrete is replaced by any of the mineral admixtures. Here, the present study to development of blended self-compacting concrete by replaced in the mineral admixtures using Fly ash 0-30% and metakaolin 0-30% as the weight of cement. Study the rheological properties and mechanical properties of developed blended SCC mixes in the laboratory condition and different curing ages. In recent years, many researchers have established that the use of supplementary cementatious materials (SCMs) like blast furnace slag, silica fume, metakaolin (MK), fly ash (FA) and rice husk ash (RHA) etc. can, not only improve the various properties of concrete both in its fresh and hardened states, but also can contribute to economy in construction costsruning.
An Experimental Investigation on Strength Characteristics of Concrete with Pa...ijsrd.com
One of the approaches in improving the durability of concrete is to use blended cement materials such as fly ash, silica fume, slag and more recently, metakaolin. By changing the chemistry and microstructure of concrete, pozzolans reduce the capillary porosity of the cementitious system and make them less permeable to exterior chemical sources as well as reducing the internal chemical incompatilities such as alkali-silica reaction. The concrete industry is known to leave an enormous environmental footprint on Planet Earth. First, there are the sheer volumes of material needed to produce the billions of tons of concrete worldwide each year. Then there are the CO2 emissions caused during the production of Portland cement. Together with the energy requirements, water consumption and generation of construction and demolition waste, these factors contribute to the general appearance that concrete is not particularly environmentally friendly or compatible with the demands of sustainable development. Thus, use of these supplementary cementitious materials can reduce the effects of cement causing severe environmental impact. This study presents the results of different mechanical properties of concrete such as compressive strength, split tensile strength and flexural concrete by partially replacing cement with metakaolin and silica fume. The replacement of metakaolin is varied from 10%, 15%, 20% and 25% and silica fume from 6%, 8% and 10%. The property of concrete in fresh state that is the workability is also studied during the present investigation. The optimum doses of silica fume and metakaolin in combination were found to be 6% and 15% (by weight) respectively, when used as part replacement of ordinary Portland cement.
Impact and Performance of Linen Fiber Reinforced Concrete in Slender ColumnsAJSERJournal
This study was consisted of two phases, revealed the behavior of Self-Compacting Concrete (SCC)
specimens of small-diameter slender column to achieve high quality concrete properties without using concrete
vibrator. The first phase investigated the effect of linen fiber on the rheological properties of SCC using two mixes types:
type I mix: without lime powder, and type II mix: with 20% lime as a replacement of cement content. The linen fiber was
contented of 0, 2, and 4 Kg/m³. In the second phase, the type II mix was used to cast three columns; one with plain SCC
and the other two with 2 and 4 Kg/m³ fiber contents. These columns were cured and cut in a certain manner to obtain 7
cylinders 150 × 300 mm and 8 slices 20 mm thickness. The cylinders were used to measure the distribution of unit
weight, compressive strength, and ultrasonic pulse velocity (UPV) along the column height. The rheological properties
of SCC were reduced with the additives of fibers to the mix constituents, but the properties of Fiber reinforced SelfCompacted Concrete (FSCC) were tested at 4 Kg/m³ fiber content. The distribution of unit weight, compressive strength,
and UPV provided good compaction of concrete. Also, the distribution of coarse aggregate at bottom, middle and top
sections of columns were uniformly distributed.
Experimental Study on Various Strength of High Performance Concrete by using ...IRJET Journal
This document presents an experimental study on the effects of using metakaolin and nano-silica on the strength properties of high performance concrete. Concrete cubes, cylinders, and beams were cast with various mix proportions replacing 0-30% of cement with metakaolin and 1.5-4.5% with nano-silica. The specimens were tested after 7 and 28 days of curing to determine their compressive, tensile, and flexural strengths. The results showed that partial replacements of cement with metakaolin and nano-silica can improve the strength characteristics of concrete.
This document summarizes a study on the strength characteristics of geopolymer concrete containing recycled concrete aggregate (RCA). Two series of geopolymer concrete with different molar concentrations (8M and 14M) of sodium hydroxide were tested. For each series, 15 concrete cube specimens were prepared and tested for compressive strength at ages of 3, 7, 14, 21, and 28 days. The results showed that compressive strength increased with higher sodium hydroxide concentration. At 7 days the strength was around 90% of the 28-day strength. The aggregate impact and crushing values of the RCA were also reported. The study concluded that higher sodium hydroxide concentration leads to higher geopolymer concrete strength due
This document summarizes a study on the strength characteristics of geopolymer concrete containing recycled concrete aggregate. Two series of geopolymer concrete specimens were prepared with different molar concentrations of sodium hydroxide (8M and 14M). A total of 30 cube specimens were tested to determine the compressive strength at various ages. The results showed that compressive strength increased with higher molarity of sodium hydroxide and that at 7 days the strength was around 90% of the 28-day strength. Using a higher concentration of sodium hydroxide produced a stronger bond between the aggregate and paste in the geopolymer concrete.
Compressive strength variability of brown coal fly ash geopolymer concreteeSAT Publishing House
The document summarizes research investigating the compressive strength variability of geopolymer concrete made with brown coal fly ash as a binder. Testing of six mixes of geopolymer concrete found a large range in 28-day compressive strengths, from 43.81 MPa to 7.21 MPa. Additional chemical analysis found significant variability in the chemical composition of samples from the same brown coal fly ash source, particularly in the silicon dioxide and aluminum oxide contents. This variability is believed to contribute to the variability in compressive strengths and suggests the need for pretreatment and refinement of brown coal fly ash to produce more consistent geopolymer concrete.
This document summarizes a research study on the effect of using electrically precipitated fly ash (EPFA) as a partial replacement for cement in self-compacting concrete (SCC). The study tested SCC mixes with 0-30% EPFA replacement at 5% intervals. Tests were conducted on fresh properties, mechanical properties like compressive strength, and durability properties like rapid chloride permeability and water sorptivity. Results showed that 20% EPFA replacement provided better results than the control SCC mix, improving properties while also providing economic and environmental benefits through reduced cement usage.
Study of Mechanical Properties in SCC by Blending Cement Partially With Fly A...IJSRD
The development of self-compacting concrete has been one of the most important materials in the modern building industry. The purpose of this concrete concept is to decrease the risk due to human factor. The use of SCC is spreading worldwide because of its very attractive properties. In the present investigation Blended SCC is the one in which some percentage of cement content used for the concrete is replaced by any of the mineral admixtures. Here, the present study to development of blended self-compacting concrete by replaced in the mineral admixtures using Fly ash 0-30% and metakaolin 0-30% as the weight of cement. Study the rheological properties and mechanical properties of developed blended SCC mixes in the laboratory condition and different curing ages. In recent years, many researchers have established that the use of supplementary cementatious materials (SCMs) like blast furnace slag, silica fume, metakaolin (MK), fly ash (FA) and rice husk ash (RHA) etc. can, not only improve the various properties of concrete both in its fresh and hardened states, but also can contribute to economy in construction costsruning.
An Experimental Investigation on Strength Characteristics of Concrete with Pa...ijsrd.com
One of the approaches in improving the durability of concrete is to use blended cement materials such as fly ash, silica fume, slag and more recently, metakaolin. By changing the chemistry and microstructure of concrete, pozzolans reduce the capillary porosity of the cementitious system and make them less permeable to exterior chemical sources as well as reducing the internal chemical incompatilities such as alkali-silica reaction. The concrete industry is known to leave an enormous environmental footprint on Planet Earth. First, there are the sheer volumes of material needed to produce the billions of tons of concrete worldwide each year. Then there are the CO2 emissions caused during the production of Portland cement. Together with the energy requirements, water consumption and generation of construction and demolition waste, these factors contribute to the general appearance that concrete is not particularly environmentally friendly or compatible with the demands of sustainable development. Thus, use of these supplementary cementitious materials can reduce the effects of cement causing severe environmental impact. This study presents the results of different mechanical properties of concrete such as compressive strength, split tensile strength and flexural concrete by partially replacing cement with metakaolin and silica fume. The replacement of metakaolin is varied from 10%, 15%, 20% and 25% and silica fume from 6%, 8% and 10%. The property of concrete in fresh state that is the workability is also studied during the present investigation. The optimum doses of silica fume and metakaolin in combination were found to be 6% and 15% (by weight) respectively, when used as part replacement of ordinary Portland cement.
Impact and Performance of Linen Fiber Reinforced Concrete in Slender ColumnsAJSERJournal
This study was consisted of two phases, revealed the behavior of Self-Compacting Concrete (SCC)
specimens of small-diameter slender column to achieve high quality concrete properties without using concrete
vibrator. The first phase investigated the effect of linen fiber on the rheological properties of SCC using two mixes types:
type I mix: without lime powder, and type II mix: with 20% lime as a replacement of cement content. The linen fiber was
contented of 0, 2, and 4 Kg/m³. In the second phase, the type II mix was used to cast three columns; one with plain SCC
and the other two with 2 and 4 Kg/m³ fiber contents. These columns were cured and cut in a certain manner to obtain 7
cylinders 150 × 300 mm and 8 slices 20 mm thickness. The cylinders were used to measure the distribution of unit
weight, compressive strength, and ultrasonic pulse velocity (UPV) along the column height. The rheological properties
of SCC were reduced with the additives of fibers to the mix constituents, but the properties of Fiber reinforced SelfCompacted Concrete (FSCC) were tested at 4 Kg/m³ fiber content. The distribution of unit weight, compressive strength,
and UPV provided good compaction of concrete. Also, the distribution of coarse aggregate at bottom, middle and top
sections of columns were uniformly distributed.
Experimental Study on Various Strength of High Performance Concrete by using ...IRJET Journal
This document presents an experimental study on the effects of using metakaolin and nano-silica on the strength properties of high performance concrete. Concrete cubes, cylinders, and beams were cast with various mix proportions replacing 0-30% of cement with metakaolin and 1.5-4.5% with nano-silica. The specimens were tested after 7 and 28 days of curing to determine their compressive, tensile, and flexural strengths. The results showed that partial replacements of cement with metakaolin and nano-silica can improve the strength characteristics of concrete.
This document summarizes a study on the strength characteristics of geopolymer concrete containing recycled concrete aggregate (RCA). Two series of geopolymer concrete with different molar concentrations (8M and 14M) of sodium hydroxide were tested. For each series, 15 concrete cube specimens were prepared and tested for compressive strength at ages of 3, 7, 14, 21, and 28 days. The results showed that compressive strength increased with higher sodium hydroxide concentration. At 7 days the strength was around 90% of the 28-day strength. The aggregate impact and crushing values of the RCA were also reported. The study concluded that higher sodium hydroxide concentration leads to higher geopolymer concrete strength due
This document summarizes a study on the strength characteristics of geopolymer concrete containing recycled concrete aggregate. Two series of geopolymer concrete specimens were prepared with different molar concentrations of sodium hydroxide (8M and 14M). A total of 30 cube specimens were tested to determine the compressive strength at various ages. The results showed that compressive strength increased with higher molarity of sodium hydroxide and that at 7 days the strength was around 90% of the 28-day strength. Using a higher concentration of sodium hydroxide produced a stronger bond between the aggregate and paste in the geopolymer concrete.
Compressive strength variability of brown coal fly ash geopolymer concreteeSAT Publishing House
The document summarizes research investigating the compressive strength variability of geopolymer concrete made with brown coal fly ash as a binder. Testing of six mixes of geopolymer concrete found a large range in 28-day compressive strengths, from 43.81 MPa to 7.21 MPa. Additional chemical analysis found significant variability in the chemical composition of samples from the same brown coal fly ash source, particularly in the silicon dioxide and aluminum oxide contents. This variability is believed to contribute to the variability in compressive strengths and suggests the need for pretreatment and refinement of brown coal fly ash to produce more consistent geopolymer concrete.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Improving the Properties of Self-compacted Concrete with Using Combined Silic...Pouyan Fakharian
The viscosity is the main property of self- compacted concrete (SCC) and using of pozzolan material such as metakaolin (MK) and Silica fume (SF) can help to achieve that goal. The effect of simultaneous substitution of MK and SF instead of cement on the rheological and mechanical properties of self-compacted concrete was experimentally investigated in this paper. Seventeen mix designs were cast with a substitution weight percentage (5, 10, 15, 20 %) in water to adhesive material ratio equal 0.32. All mixes were examined by compressive, tensile strengths and water absorption tests with an appropriate fluidity, without having signs of segregation or instability. The test results were indicated that the SCC mixes containing MK and SF had higher compressive and tensile strengths in comparison with no-pozzolan concrete. The comparison of linear multiple regression techniques (LMRT) and nonlinear multiple regression technique outputs with experimental results showed an appropriate similarity.
Characteristics of Ultra-High-Performance Fiber-Reinforced Concrete with admi...IRJET Journal
This document reviews the characteristics of ultra-high-performance fiber reinforced concrete (UHPFRC) with admixtures. It investigates the historical background and workability effects of steel fibers in plain and UHPFRC. The addition of mineral admixtures like nano-silica and steel fibers at 1-3% by volume is found to improve the strength and workability of UHPFRC. However, the workability is reduced by the finer particle sizes of mineral admixtures and increased viscosity from steel fibers. Optimal dosages of fibers and admixtures are needed to ensure uniform fiber distribution and adequate workability for practical applications of UHPFRC.
Effects of Self Compacting Concrete Using the Discrete Models as Binary & Ter...theijes
The effect of using nanosized[4],[5] pozzolanic materials [1], [12], 14] like Fly ash(FA) [3], Metakeolin (MK) [8],Silica fume(SF)[6],Rise husk ash(RHA)[14],Ground granulated blust furnace slag (GGBFS)[2] etc. as partial replacement with dry weight of Ordinary Portland Cement(OPC) to enhance the strength, durability, workability of concrete. The test results of fresh and the hardened properties of Self compacting concrete (SCC)[8],[19] incorporating pozzolanic materials at various percentage by fixing the Water to Binder (i.e. powder)ratio(w/b) of 0.45. The effects of pozzolanic materials properties of SCC were investigated by comparing the test results. Various tests [4],[5],[9] were conducted on fresh SCC like the slump flow, L-box passing ability of the SCC mixtures and T500mm slump flow time were also done. Compressive strength test [9] along with the Initial surface absorption test(ISAT) and the Capillary suction test(CST)[7] were also performed on the hardened SCC[8]
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Structural design and economic evaluation of roller compacted concrete pavementSalih Taner YILDIRIM
Abut, Y., & Yildirim, S. T. (2017, October). Structural design and economic evaluation of roller compacted concrete pavement with recycled aggregates. In IOP Conference Series: Materials Science and Engineering (Vol. 245, No. 2, p. 022064). IOP Publishing.
Toward Sustainable Green Cement Enhanced by Basic Oxygen Steelmaking (BOS) SlagTalalSalem5
This study investigates the effects of basic oxygen steelmaking (BOS) slag on the mechanical and chemical properties of ordinary Portland cement (OPC) type I. The BOS-enhanced cement is produced and casted into cubic and beam-like samples for the compressive and three-point bending tests, and the compressive and flexural strengths are experimentally measured. Numerical simulations are conducted to validate the experimental result and satisfactory agreements are obtained. XRD investigations are then carried out, which indicates that 5% BOS is the optimal ratio to accelerate the hydration process while increasing the amount of hydration products, especially at the early curing age of 3 days. Scanning electron microscope (SEM) images further indicate that BOS can be used to prevent the development of microcracks while mitigate their propagation within cement mortar. Our study indicates that the compressive strength of OPC can be critically increased by BOS at the relatively low concentrations of 5%. At the end, cost analysis of partially replacing OPC with (0-15%) of BOS was reported.
Effect of mineral admixtures on characteristics of high strength concreteeSAT Journals
Abstract
There is great need to conserve all the natural resources. The various steps to be adopted in the direction that includes minimization of production of energy consuming materials and heavy utilization of industrial by-products. High strength concrete can be produce using such materials like fly ash, slag and silica fumes. In many countries, these materials are already used in manufacturing of concrete. Some of these material can be used as replacement for cement. Ultimately it results in the reduction of the cost manufacturing of concrete and reduces environmental pollution. To study the effect of mineral admixtures such as fly ash, slag and silica fume on mechanical properties of high strength concrete under the uniaxial compression and split tensile, experimental studies have been conducted. The cement was replaced by 5%, 10%, 15% and 20% with fly ash and slag respectively. The compressive strength and split tensile test were conducted on concrete specimen with different percentages of fly ash and slag at age of 7 days, 28 days and 56 days. This study shows that materials used in this experiment are suitable for HSC.
Keywords: environmental pollution, fly ash, slag and silica fumes
IRJET-Stabilization of Expansive Soils by using Corncob AshIRJET Journal
The document presents research on stabilizing expansive soils using corncob ash as an additive. A variety of tests were conducted to analyze how different percentages of corncob ash addition affected properties of the expansive soil like optimum moisture content, unconfined compressive strength, California bearing ratio, free swell index, and plasticity. The results showed that corncob ash addition generally reduced the plasticity and swell potential of the soil while increasing its strength, making it more suitable for pavement applications.
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology
. effect of different types of cement on fresh and mechanical properties of c...ENGJiidhe
The document reviews several studies that investigated the effect of different cement types on the fresh and mechanical properties of concrete. The cement types investigated included ordinary Portland cement, fly ash-based cement, slag cement, and cement with supplementary materials like silica fume, metakaolin, and polyethylene therephthalate. The studies found that workability generally decreased with the addition of supplementary materials but mechanical properties like compressive strength and durability increased. The performance of concrete depended on factors like water-cement ratio, curing conditions, and the replacement levels of supplementary materials. Overall, the studies emphasized that choosing the appropriate cement type and optimizing the mix design can improve the properties of concrete for different applications.
This document summarizes a review on the properties of high-performance concrete. It discusses that high-performance concrete incorporates supplementary cementitious materials like fly ash and silica fume to improve strength and durability compared to regular concrete. It describes various supplementary materials used in high-performance concrete like silica fume, alccofine, metakaolin, rice husk ash, and bamboo leaf ash and how they improve properties. It also discusses the effects of aggregates, fibers, and other ingredients on high-performance concrete characteristics. The purpose is to provide information on developing high-performance concrete mixtures with optimized properties.
Influence of the proportion of materials on the rheology and mechanical stren...Shakerqaidi
This document presents research on the influence of constituent material ratios on the rheology and mechanical strength of ultra-high performance concrete (UHPC). Specifically, it investigates the effects of superplasticizer content, microsilica substitution, and water-to-binder ratio on squeeze flow characteristics and compressive and flexural strength. The key findings are that increasing superplasticizer dose enhanced compressive strength by up to 12%, while increasing water-to-binder ratio lowered it by up to 14%. Furthermore, increasing the amount of binder and/or decreasing the amount of sand broke down the concrete skeleton structure, lowering compressive strength. Squeeze flow testing revealed that higher superplasticizer doses and water-to-
Effect of Lime Stabilisation on the Strength and Microstructure of ClayIOSR Journals
Abstract:Lime stabilization is one of the techniques that can be used for improving the engineering properties,
particularly the strength, of soft clays. This paper aims to investigate the effect of hydrated lime on the strength
and microstructure of lime treated clays. In order to illustrate such effect, a series of laboratory tests were
conducted. Atterberg limits, compaction tests, unconfined compressive strength tests and scanning electron
microscope (SEM) were carried out on kaolin clay mixed with 5% hydrated lime. The results indicated that the
addition of lime resulted in a reduction in the plasticity of kaolin and an improvement in compaction properties.
The unconfined compressive strength (UCS) of stabilized clay experienced an increase with lime addition. Two
variables influencing the amount of strength developed were studied. These variables included curing time and
water content. Curing time contributed to an increase in the UCS, from 183 kPa to 390 kPa, that is
approximately twice of the strength of untreated kaolin. SEM analysis showed the presence of the cementious
products in the kaolin clay resulted from lime-clay reaction.
Key words:Lime, Stabilisation, Soft clay, Pozzolanic reaction, Mineralogy
Review on Study of Recycled Aggregate Concrete Containing Silica Fume as Part...IRJET Journal
This document summarizes previous research on recycled aggregate concrete containing silica fume as a partial cement replacement. It discusses studies that investigated how replacing natural aggregates with recycled concrete aggregates at different percentages (0-50%) impacted the mechanical and durability properties of concrete. The results showed that replacing up to 30% of natural aggregates with recycled aggregates can achieve similar strength as conventional concrete, but strength decreases when replacement exceeds 30%. Adding silica fume was found to improve properties such as compressive strength and permeability. The optimal replacement rate of recycled aggregates was determined to be 30%.
IRJET- Performance of Fiber Reinforced Self Compacting Concrete Made with...IRJET Journal
This document presents research on fiber reinforced self-compacting concrete (FRSCC) made with manufactured sand. The study investigated the workability and mechanical strength properties of FRSCC mixtures with varying fiber types (steel and polypropylene) and dosages (0.5-2% by volume). Testing of fresh and hardened concrete properties showed that FRSCC mixtures with 1% steel fiber or 1.5% polypropylene fiber content met fresh concrete workability standards and achieved higher compressive and flexural strengths than plain self-compacting concrete. The results indicate that manufactured sand can be partially substituted for natural river sand in producing fiber reinforced self-compacting concrete with improved mechanical properties.
An Experimental Investigation on Strength Characteristics of Concrete with P...IJMER
One of the approaches in improving the durability of concrete is to use blended cement
materials such as fly ash, silica fume, slag and more recently, metakaolin.. This study presents the results
of different mechanical properties of concrete such as compressive strength, split tensile strength and
flexural concrete by partially replacing cement with metakaolin and silica fume. The replacement of
metakaolin is varied from 10%, 15%, 20% and 25% and silica fume from 6%, 8% and 10%. The property
of concrete in fresh state, that is the workability is also studied during the present investigation.The
optimum doses of silica fume and metakaolin in combination were found to be 6% and 15% (by weight)
respectively, when used as part replacement of ordinary Portland cement.
IRJET- Experimental Study on Strength Properties of Concrete by Partial Repla...IRJET Journal
1) The document experimentally studied the strength properties of concrete with partial replacement of cement by metakaolin and fine aggregate by manufactured sand (robo sand) for M30 grade concrete.
2) Results showed that concrete with 5% cement replaced by metakaolin and 50% fine aggregate replaced by robo sand achieved 25.42%, 18.37%, 17.22% and 13.12% higher compressive, split tensile, shear and flexural strengths respectively compared to conventional concrete at 28 days.
3) Metakaolin is a pozzolanic material that improves strength and durability of concrete by filling pores and reducing permeability, while use of robo sand as a replacement for natural sand addresses shortage
TUNNELING IN HIMALAYAS WITH NATM METHOD: A SPECIAL REFERENCES TO SUNGAL TUNNE...IRJET Journal
1) The document discusses the Sungal Tunnel project in Jammu and Kashmir, India, which is being constructed using the New Austrian Tunneling Method (NATM).
2) NATM involves continuous monitoring during construction to adapt to changing ground conditions, and makes extensive use of shotcrete for temporary tunnel support.
3) The methodology section outlines the systematic geotechnical design process for tunnels according to Austrian guidelines, and describes the various steps of NATM tunnel construction including initial and secondary tunnel support.
STUDY THE EFFECT OF RESPONSE REDUCTION FACTOR ON RC FRAMED STRUCTUREIRJET Journal
This study examines the effect of response reduction factors (R factors) on reinforced concrete (RC) framed structures through nonlinear dynamic analysis. Three RC frame models with varying heights (4, 8, and 12 stories) were analyzed in ETABS software under different R factors ranging from 1 to 5. The results showed that displacement increased as the R factor decreased, indicating less linear behavior for lower R factors. Drift also decreased proportionally with increasing R factors from 1 to 5. Shear forces in the frames decreased with higher R factors. In general, R factors of 3 to 5 produced more satisfactory performance with less displacement and drift. The displacement variations between different building heights were consistent at different R factors. This study evaluated how R factors influence
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International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Improving the Properties of Self-compacted Concrete with Using Combined Silic...Pouyan Fakharian
The viscosity is the main property of self- compacted concrete (SCC) and using of pozzolan material such as metakaolin (MK) and Silica fume (SF) can help to achieve that goal. The effect of simultaneous substitution of MK and SF instead of cement on the rheological and mechanical properties of self-compacted concrete was experimentally investigated in this paper. Seventeen mix designs were cast with a substitution weight percentage (5, 10, 15, 20 %) in water to adhesive material ratio equal 0.32. All mixes were examined by compressive, tensile strengths and water absorption tests with an appropriate fluidity, without having signs of segregation or instability. The test results were indicated that the SCC mixes containing MK and SF had higher compressive and tensile strengths in comparison with no-pozzolan concrete. The comparison of linear multiple regression techniques (LMRT) and nonlinear multiple regression technique outputs with experimental results showed an appropriate similarity.
Characteristics of Ultra-High-Performance Fiber-Reinforced Concrete with admi...IRJET Journal
This document reviews the characteristics of ultra-high-performance fiber reinforced concrete (UHPFRC) with admixtures. It investigates the historical background and workability effects of steel fibers in plain and UHPFRC. The addition of mineral admixtures like nano-silica and steel fibers at 1-3% by volume is found to improve the strength and workability of UHPFRC. However, the workability is reduced by the finer particle sizes of mineral admixtures and increased viscosity from steel fibers. Optimal dosages of fibers and admixtures are needed to ensure uniform fiber distribution and adequate workability for practical applications of UHPFRC.
Effects of Self Compacting Concrete Using the Discrete Models as Binary & Ter...theijes
The effect of using nanosized[4],[5] pozzolanic materials [1], [12], 14] like Fly ash(FA) [3], Metakeolin (MK) [8],Silica fume(SF)[6],Rise husk ash(RHA)[14],Ground granulated blust furnace slag (GGBFS)[2] etc. as partial replacement with dry weight of Ordinary Portland Cement(OPC) to enhance the strength, durability, workability of concrete. The test results of fresh and the hardened properties of Self compacting concrete (SCC)[8],[19] incorporating pozzolanic materials at various percentage by fixing the Water to Binder (i.e. powder)ratio(w/b) of 0.45. The effects of pozzolanic materials properties of SCC were investigated by comparing the test results. Various tests [4],[5],[9] were conducted on fresh SCC like the slump flow, L-box passing ability of the SCC mixtures and T500mm slump flow time were also done. Compressive strength test [9] along with the Initial surface absorption test(ISAT) and the Capillary suction test(CST)[7] were also performed on the hardened SCC[8]
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Structural design and economic evaluation of roller compacted concrete pavementSalih Taner YILDIRIM
Abut, Y., & Yildirim, S. T. (2017, October). Structural design and economic evaluation of roller compacted concrete pavement with recycled aggregates. In IOP Conference Series: Materials Science and Engineering (Vol. 245, No. 2, p. 022064). IOP Publishing.
Toward Sustainable Green Cement Enhanced by Basic Oxygen Steelmaking (BOS) SlagTalalSalem5
This study investigates the effects of basic oxygen steelmaking (BOS) slag on the mechanical and chemical properties of ordinary Portland cement (OPC) type I. The BOS-enhanced cement is produced and casted into cubic and beam-like samples for the compressive and three-point bending tests, and the compressive and flexural strengths are experimentally measured. Numerical simulations are conducted to validate the experimental result and satisfactory agreements are obtained. XRD investigations are then carried out, which indicates that 5% BOS is the optimal ratio to accelerate the hydration process while increasing the amount of hydration products, especially at the early curing age of 3 days. Scanning electron microscope (SEM) images further indicate that BOS can be used to prevent the development of microcracks while mitigate their propagation within cement mortar. Our study indicates that the compressive strength of OPC can be critically increased by BOS at the relatively low concentrations of 5%. At the end, cost analysis of partially replacing OPC with (0-15%) of BOS was reported.
Effect of mineral admixtures on characteristics of high strength concreteeSAT Journals
Abstract
There is great need to conserve all the natural resources. The various steps to be adopted in the direction that includes minimization of production of energy consuming materials and heavy utilization of industrial by-products. High strength concrete can be produce using such materials like fly ash, slag and silica fumes. In many countries, these materials are already used in manufacturing of concrete. Some of these material can be used as replacement for cement. Ultimately it results in the reduction of the cost manufacturing of concrete and reduces environmental pollution. To study the effect of mineral admixtures such as fly ash, slag and silica fume on mechanical properties of high strength concrete under the uniaxial compression and split tensile, experimental studies have been conducted. The cement was replaced by 5%, 10%, 15% and 20% with fly ash and slag respectively. The compressive strength and split tensile test were conducted on concrete specimen with different percentages of fly ash and slag at age of 7 days, 28 days and 56 days. This study shows that materials used in this experiment are suitable for HSC.
Keywords: environmental pollution, fly ash, slag and silica fumes
IRJET-Stabilization of Expansive Soils by using Corncob AshIRJET Journal
The document presents research on stabilizing expansive soils using corncob ash as an additive. A variety of tests were conducted to analyze how different percentages of corncob ash addition affected properties of the expansive soil like optimum moisture content, unconfined compressive strength, California bearing ratio, free swell index, and plasticity. The results showed that corncob ash addition generally reduced the plasticity and swell potential of the soil while increasing its strength, making it more suitable for pavement applications.
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology
. effect of different types of cement on fresh and mechanical properties of c...ENGJiidhe
The document reviews several studies that investigated the effect of different cement types on the fresh and mechanical properties of concrete. The cement types investigated included ordinary Portland cement, fly ash-based cement, slag cement, and cement with supplementary materials like silica fume, metakaolin, and polyethylene therephthalate. The studies found that workability generally decreased with the addition of supplementary materials but mechanical properties like compressive strength and durability increased. The performance of concrete depended on factors like water-cement ratio, curing conditions, and the replacement levels of supplementary materials. Overall, the studies emphasized that choosing the appropriate cement type and optimizing the mix design can improve the properties of concrete for different applications.
This document summarizes a review on the properties of high-performance concrete. It discusses that high-performance concrete incorporates supplementary cementitious materials like fly ash and silica fume to improve strength and durability compared to regular concrete. It describes various supplementary materials used in high-performance concrete like silica fume, alccofine, metakaolin, rice husk ash, and bamboo leaf ash and how they improve properties. It also discusses the effects of aggregates, fibers, and other ingredients on high-performance concrete characteristics. The purpose is to provide information on developing high-performance concrete mixtures with optimized properties.
Influence of the proportion of materials on the rheology and mechanical stren...Shakerqaidi
This document presents research on the influence of constituent material ratios on the rheology and mechanical strength of ultra-high performance concrete (UHPC). Specifically, it investigates the effects of superplasticizer content, microsilica substitution, and water-to-binder ratio on squeeze flow characteristics and compressive and flexural strength. The key findings are that increasing superplasticizer dose enhanced compressive strength by up to 12%, while increasing water-to-binder ratio lowered it by up to 14%. Furthermore, increasing the amount of binder and/or decreasing the amount of sand broke down the concrete skeleton structure, lowering compressive strength. Squeeze flow testing revealed that higher superplasticizer doses and water-to-
Effect of Lime Stabilisation on the Strength and Microstructure of ClayIOSR Journals
Abstract:Lime stabilization is one of the techniques that can be used for improving the engineering properties,
particularly the strength, of soft clays. This paper aims to investigate the effect of hydrated lime on the strength
and microstructure of lime treated clays. In order to illustrate such effect, a series of laboratory tests were
conducted. Atterberg limits, compaction tests, unconfined compressive strength tests and scanning electron
microscope (SEM) were carried out on kaolin clay mixed with 5% hydrated lime. The results indicated that the
addition of lime resulted in a reduction in the plasticity of kaolin and an improvement in compaction properties.
The unconfined compressive strength (UCS) of stabilized clay experienced an increase with lime addition. Two
variables influencing the amount of strength developed were studied. These variables included curing time and
water content. Curing time contributed to an increase in the UCS, from 183 kPa to 390 kPa, that is
approximately twice of the strength of untreated kaolin. SEM analysis showed the presence of the cementious
products in the kaolin clay resulted from lime-clay reaction.
Key words:Lime, Stabilisation, Soft clay, Pozzolanic reaction, Mineralogy
Review on Study of Recycled Aggregate Concrete Containing Silica Fume as Part...IRJET Journal
This document summarizes previous research on recycled aggregate concrete containing silica fume as a partial cement replacement. It discusses studies that investigated how replacing natural aggregates with recycled concrete aggregates at different percentages (0-50%) impacted the mechanical and durability properties of concrete. The results showed that replacing up to 30% of natural aggregates with recycled aggregates can achieve similar strength as conventional concrete, but strength decreases when replacement exceeds 30%. Adding silica fume was found to improve properties such as compressive strength and permeability. The optimal replacement rate of recycled aggregates was determined to be 30%.
IRJET- Performance of Fiber Reinforced Self Compacting Concrete Made with...IRJET Journal
This document presents research on fiber reinforced self-compacting concrete (FRSCC) made with manufactured sand. The study investigated the workability and mechanical strength properties of FRSCC mixtures with varying fiber types (steel and polypropylene) and dosages (0.5-2% by volume). Testing of fresh and hardened concrete properties showed that FRSCC mixtures with 1% steel fiber or 1.5% polypropylene fiber content met fresh concrete workability standards and achieved higher compressive and flexural strengths than plain self-compacting concrete. The results indicate that manufactured sand can be partially substituted for natural river sand in producing fiber reinforced self-compacting concrete with improved mechanical properties.
An Experimental Investigation on Strength Characteristics of Concrete with P...IJMER
One of the approaches in improving the durability of concrete is to use blended cement
materials such as fly ash, silica fume, slag and more recently, metakaolin.. This study presents the results
of different mechanical properties of concrete such as compressive strength, split tensile strength and
flexural concrete by partially replacing cement with metakaolin and silica fume. The replacement of
metakaolin is varied from 10%, 15%, 20% and 25% and silica fume from 6%, 8% and 10%. The property
of concrete in fresh state, that is the workability is also studied during the present investigation.The
optimum doses of silica fume and metakaolin in combination were found to be 6% and 15% (by weight)
respectively, when used as part replacement of ordinary Portland cement.
IRJET- Experimental Study on Strength Properties of Concrete by Partial Repla...IRJET Journal
1) The document experimentally studied the strength properties of concrete with partial replacement of cement by metakaolin and fine aggregate by manufactured sand (robo sand) for M30 grade concrete.
2) Results showed that concrete with 5% cement replaced by metakaolin and 50% fine aggregate replaced by robo sand achieved 25.42%, 18.37%, 17.22% and 13.12% higher compressive, split tensile, shear and flexural strengths respectively compared to conventional concrete at 28 days.
3) Metakaolin is a pozzolanic material that improves strength and durability of concrete by filling pores and reducing permeability, while use of robo sand as a replacement for natural sand addresses shortage
Similar to Evolution of the Physico-Mechanical Properties of Calcined Clay Cement from Different Sources of Kaolin Clay (20)
TUNNELING IN HIMALAYAS WITH NATM METHOD: A SPECIAL REFERENCES TO SUNGAL TUNNE...IRJET Journal
1) The document discusses the Sungal Tunnel project in Jammu and Kashmir, India, which is being constructed using the New Austrian Tunneling Method (NATM).
2) NATM involves continuous monitoring during construction to adapt to changing ground conditions, and makes extensive use of shotcrete for temporary tunnel support.
3) The methodology section outlines the systematic geotechnical design process for tunnels according to Austrian guidelines, and describes the various steps of NATM tunnel construction including initial and secondary tunnel support.
STUDY THE EFFECT OF RESPONSE REDUCTION FACTOR ON RC FRAMED STRUCTUREIRJET Journal
This study examines the effect of response reduction factors (R factors) on reinforced concrete (RC) framed structures through nonlinear dynamic analysis. Three RC frame models with varying heights (4, 8, and 12 stories) were analyzed in ETABS software under different R factors ranging from 1 to 5. The results showed that displacement increased as the R factor decreased, indicating less linear behavior for lower R factors. Drift also decreased proportionally with increasing R factors from 1 to 5. Shear forces in the frames decreased with higher R factors. In general, R factors of 3 to 5 produced more satisfactory performance with less displacement and drift. The displacement variations between different building heights were consistent at different R factors. This study evaluated how R factors influence
A COMPARATIVE ANALYSIS OF RCC ELEMENT OF SLAB WITH STARK STEEL (HYSD STEEL) A...IRJET Journal
This study compares the use of Stark Steel and TMT Steel as reinforcement materials in a two-way reinforced concrete slab. Mechanical testing is conducted to determine the tensile strength, yield strength, and other properties of each material. A two-way slab design adhering to codes and standards is executed with both materials. The performance is analyzed in terms of deflection, stability under loads, and displacement. Cost analyses accounting for material, durability, maintenance, and life cycle costs are also conducted. The findings provide insights into the economic and structural implications of each material for reinforcement selection and recommendations on the most suitable material based on the analysis.
Effect of Camber and Angles of Attack on Airfoil CharacteristicsIRJET Journal
This document discusses a study analyzing the effect of camber, position of camber, and angle of attack on the aerodynamic characteristics of airfoils. Sixteen modified asymmetric NACA airfoils were analyzed using computational fluid dynamics (CFD) by varying the camber, camber position, and angle of attack. The results showed the relationship between these parameters and the lift coefficient, drag coefficient, and lift to drag ratio. This provides insight into how changes in airfoil geometry impact aerodynamic performance.
A Review on the Progress and Challenges of Aluminum-Based Metal Matrix Compos...IRJET Journal
This document reviews the progress and challenges of aluminum-based metal matrix composites (MMCs), focusing on their fabrication processes and applications. It discusses how various aluminum MMCs have been developed using reinforcements like borides, carbides, oxides, and nitrides to improve mechanical and wear properties. These composites have gained prominence for their lightweight, high-strength and corrosion resistance properties. The document also examines recent advancements in fabrication techniques for aluminum MMCs and their growing applications in industries such as aerospace and automotive. However, it notes that challenges remain around issues like improper mixing of reinforcements and reducing reinforcement agglomeration.
Dynamic Urban Transit Optimization: A Graph Neural Network Approach for Real-...IRJET Journal
This document discusses research on using graph neural networks (GNNs) for dynamic optimization of public transportation networks in real-time. GNNs represent transit networks as graphs with nodes as stops and edges as connections. The GNN model aims to optimize networks using real-time data on vehicle locations, arrival times, and passenger loads. This helps increase mobility, decrease traffic, and improve efficiency. The system continuously trains and infers to adapt to changing transit conditions, providing decision support tools. While research has focused on performance, more work is needed on security, socio-economic impacts, contextual generalization of models, continuous learning approaches, and effective real-time visualization.
Structural Analysis and Design of Multi-Storey Symmetric and Asymmetric Shape...IRJET Journal
This document summarizes a research project that aims to compare the structural performance of conventional slab and grid slab systems in multi-story buildings using ETABS software. The study will analyze both symmetric and asymmetric building models under various loading conditions. Parameters like deflections, moments, shears, and stresses will be examined to evaluate the structural effectiveness of each slab type. The results will provide insights into the comparative behavior of conventional and grid slabs to help engineers and architects select appropriate slab systems based on building layouts and design requirements.
A Review of “Seismic Response of RC Structures Having Plan and Vertical Irreg...IRJET Journal
This document summarizes and reviews a research paper on the seismic response of reinforced concrete (RC) structures with plan and vertical irregularities, with and without infill walls. It discusses how infill walls can improve or reduce the seismic performance of RC buildings, depending on factors like wall layout, height distribution, connection to the frame, and relative stiffness of walls and frames. The reviewed research paper analyzes the behavior of infill walls, effects of vertical irregularities, and seismic performance of high-rise structures under linear static and dynamic analysis. It studies response characteristics like story drift, deflection and shear. The document also provides literature on similar research investigating the effects of infill walls, soft stories, plan irregularities, and different
This document provides a review of machine learning techniques used in Advanced Driver Assistance Systems (ADAS). It begins with an abstract that summarizes key applications of machine learning in ADAS, including object detection, recognition, and decision-making. The introduction discusses the integration of machine learning in ADAS and how it is transforming vehicle safety. The literature review then examines several research papers on topics like lightweight deep learning models for object detection and lane detection models using image processing. It concludes by discussing challenges and opportunities in the field, such as improving algorithm robustness and adaptability.
Long Term Trend Analysis of Precipitation and Temperature for Asosa district,...IRJET Journal
The document analyzes temperature and precipitation trends in Asosa District, Benishangul Gumuz Region, Ethiopia from 1993 to 2022 based on data from the local meteorological station. The results show:
1) The average maximum and minimum annual temperatures have generally decreased over time, with maximum temperatures decreasing by a factor of -0.0341 and minimum by -0.0152.
2) Mann-Kendall tests found the decreasing temperature trends to be statistically significant for annual maximum temperatures but not for annual minimum temperatures.
3) Annual precipitation in Asosa District showed a statistically significant increasing trend.
The conclusions recommend development planners account for rising summer precipitation and declining temperatures in
P.E.B. Framed Structure Design and Analysis Using STAAD ProIRJET Journal
This document discusses the design and analysis of pre-engineered building (PEB) framed structures using STAAD Pro software. It provides an overview of PEBs, including that they are designed off-site with building trusses and beams produced in a factory. STAAD Pro is identified as a key tool for modeling, analyzing, and designing PEBs to ensure their performance and safety under various load scenarios. The document outlines modeling structural parts in STAAD Pro, evaluating structural reactions, assigning loads, and following international design codes and standards. In summary, STAAD Pro is used to design and analyze PEB framed structures to ensure safety and code compliance.
A Review on Innovative Fiber Integration for Enhanced Reinforcement of Concre...IRJET Journal
This document provides a review of research on innovative fiber integration methods for reinforcing concrete structures. It discusses studies that have explored using carbon fiber reinforced polymer (CFRP) composites with recycled plastic aggregates to develop more sustainable strengthening techniques. It also examines using ultra-high performance fiber reinforced concrete to improve shear strength in beams. Additional topics covered include the dynamic responses of FRP-strengthened beams under static and impact loads, and the performance of preloaded CFRP-strengthened fiber reinforced concrete beams. The review highlights the potential of fiber composites to enable more sustainable and resilient construction practices.
Survey Paper on Cloud-Based Secured Healthcare SystemIRJET Journal
This document summarizes a survey on securing patient healthcare data in cloud-based systems. It discusses using technologies like facial recognition, smart cards, and cloud computing combined with strong encryption to securely store patient data. The survey found that healthcare professionals believe digitizing patient records and storing them in a centralized cloud system would improve access during emergencies and enable more efficient care compared to paper-based systems. However, ensuring privacy and security of patient data is paramount as healthcare incorporates these digital technologies.
Review on studies and research on widening of existing concrete bridgesIRJET Journal
This document summarizes several studies that have been conducted on widening existing concrete bridges. It describes a study from China that examined load distribution factors for a bridge widened with composite steel-concrete girders. It also outlines challenges and solutions for widening a bridge in the UAE, including replacing bearings and stitching the new and existing structures. Additionally, it discusses two bridge widening projects in New Zealand that involved adding precast beams and stitching to connect structures. Finally, safety measures and challenges for strengthening a historic bridge in Switzerland under live traffic are presented.
React based fullstack edtech web applicationIRJET Journal
The document describes the architecture of an educational technology web application built using the MERN stack. It discusses the frontend developed with ReactJS, backend with NodeJS and ExpressJS, and MongoDB database. The frontend provides dynamic user interfaces, while the backend offers APIs for authentication, course management, and other functions. MongoDB enables flexible data storage. The architecture aims to provide a scalable, responsive platform for online learning.
A Comprehensive Review of Integrating IoT and Blockchain Technologies in the ...IRJET Journal
This paper proposes integrating Internet of Things (IoT) and blockchain technologies to help implement objectives of India's National Education Policy (NEP) in the education sector. The paper discusses how blockchain could be used for secure student data management, credential verification, and decentralized learning platforms. IoT devices could create smart classrooms, automate attendance tracking, and enable real-time monitoring. Blockchain would ensure integrity of exam processes and resource allocation, while smart contracts automate agreements. The paper argues this integration has potential to revolutionize education by making it more secure, transparent and efficient, in alignment with NEP goals. However, challenges like infrastructure needs, data privacy, and collaborative efforts are also discussed.
A REVIEW ON THE PERFORMANCE OF COCONUT FIBRE REINFORCED CONCRETE.IRJET Journal
This document provides a review of research on the performance of coconut fibre reinforced concrete. It summarizes several studies that tested different volume fractions and lengths of coconut fibres in concrete mixtures with varying compressive strengths. The studies found that coconut fibre improved properties like tensile strength, toughness, crack resistance, and spalling resistance compared to plain concrete. Volume fractions of 2-5% and fibre lengths of 20-50mm produced the best results. The document concludes that using a 4-5% volume fraction of coconut fibres 30-40mm in length with M30-M60 grade concrete would provide benefits based on previous research.
Optimizing Business Management Process Workflows: The Dynamic Influence of Mi...IRJET Journal
The document discusses optimizing business management processes through automation using Microsoft Power Automate and artificial intelligence. It provides an overview of Power Automate's key components and features for automating workflows across various apps and services. The document then presents several scenarios applying automation solutions to common business processes like data entry, monitoring, HR, finance, customer support, and more. It estimates the potential time and cost savings from implementing automation for each scenario. Finally, the conclusion emphasizes the transformative impact of AI and automation tools on business processes and the need for ongoing optimization.
Multistoried and Multi Bay Steel Building Frame by using Seismic DesignIRJET Journal
The document describes the seismic design of a G+5 steel building frame located in Roorkee, India according to Indian codes IS 1893-2002 and IS 800. The frame was analyzed using the equivalent static load method and response spectrum method, and its response in terms of displacements and shear forces were compared. Based on the analysis, the frame was designed as a seismic-resistant steel structure according to IS 800:2007. The software STAAD Pro was used for the analysis and design.
Cost Optimization of Construction Using Plastic Waste as a Sustainable Constr...IRJET Journal
This research paper explores using plastic waste as a sustainable and cost-effective construction material. The study focuses on manufacturing pavers and bricks using recycled plastic and partially replacing concrete with plastic alternatives. Initial results found that pavers and bricks made from recycled plastic demonstrate comparable strength and durability to traditional materials while providing environmental and cost benefits. Additionally, preliminary research indicates incorporating plastic waste as a partial concrete replacement significantly reduces construction costs without compromising structural integrity. The outcomes suggest adopting plastic waste in construction can address plastic pollution while optimizing costs, promoting more sustainable building practices.
Low power architecture of logic gates using adiabatic techniquesnooriasukmaningtyas
The growing significance of portable systems to limit power consumption in ultra-large-scale-integration chips of very high density, has recently led to rapid and inventive progresses in low-power design. The most effective technique is adiabatic logic circuit design in energy-efficient hardware. This paper presents two adiabatic approaches for the design of low power circuits, modified positive feedback adiabatic logic (modified PFAL) and the other is direct current diode based positive feedback adiabatic logic (DC-DB PFAL). Logic gates are the preliminary components in any digital circuit design. By improving the performance of basic gates, one can improvise the whole system performance. In this paper proposed circuit design of the low power architecture of OR/NOR, AND/NAND, and XOR/XNOR gates are presented using the said approaches and their results are analyzed for powerdissipation, delay, power-delay-product and rise time and compared with the other adiabatic techniques along with the conventional complementary metal oxide semiconductor (CMOS) designs reported in the literature. It has been found that the designs with DC-DB PFAL technique outperform with the percentage improvement of 65% for NOR gate and 7% for NAND gate and 34% for XNOR gate over the modified PFAL techniques at 10 MHz respectively.
Introduction- e - waste – definition - sources of e-waste– hazardous substances in e-waste - effects of e-waste on environment and human health- need for e-waste management– e-waste handling rules - waste minimization techniques for managing e-waste – recycling of e-waste - disposal treatment methods of e- waste – mechanism of extraction of precious metal from leaching solution-global Scenario of E-waste – E-waste in India- case studies.
Advanced control scheme of doubly fed induction generator for wind turbine us...IJECEIAES
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
A review on techniques and modelling methodologies used for checking electrom...nooriasukmaningtyas
The proper function of the integrated circuit (IC) in an inhibiting electromagnetic environment has always been a serious concern throughout the decades of revolution in the world of electronics, from disjunct devices to today’s integrated circuit technology, where billions of transistors are combined on a single chip. The automotive industry and smart vehicles in particular, are confronting design issues such as being prone to electromagnetic interference (EMI). Electronic control devices calculate incorrect outputs because of EMI and sensors give misleading values which can prove fatal in case of automotives. In this paper, the authors have non exhaustively tried to review research work concerned with the investigation of EMI in ICs and prediction of this EMI using various modelling methodologies and measurement setups.
A SYSTEMATIC RISK ASSESSMENT APPROACH FOR SECURING THE SMART IRRIGATION SYSTEMSIJNSA Journal
The smart irrigation system represents an innovative approach to optimize water usage in agricultural and landscaping practices. The integration of cutting-edge technologies, including sensors, actuators, and data analysis, empowers this system to provide accurate monitoring and control of irrigation processes by leveraging real-time environmental conditions. The main objective of a smart irrigation system is to optimize water efficiency, minimize expenses, and foster the adoption of sustainable water management methods. This paper conducts a systematic risk assessment by exploring the key components/assets and their functionalities in the smart irrigation system. The crucial role of sensors in gathering data on soil moisture, weather patterns, and plant well-being is emphasized in this system. These sensors enable intelligent decision-making in irrigation scheduling and water distribution, leading to enhanced water efficiency and sustainable water management practices. Actuators enable automated control of irrigation devices, ensuring precise and targeted water delivery to plants. Additionally, the paper addresses the potential threat and vulnerabilities associated with smart irrigation systems. It discusses limitations of the system, such as power constraints and computational capabilities, and calculates the potential security risks. The paper suggests possible risk treatment methods for effective secure system operation. In conclusion, the paper emphasizes the significant benefits of implementing smart irrigation systems, including improved water conservation, increased crop yield, and reduced environmental impact. Additionally, based on the security analysis conducted, the paper recommends the implementation of countermeasures and security approaches to address vulnerabilities and ensure the integrity and reliability of the system. By incorporating these measures, smart irrigation technology can revolutionize water management practices in agriculture, promoting sustainability, resource efficiency, and safeguarding against potential security threats.
6th International Conference on Machine Learning & Applications (CMLA 2024)ClaraZara1
6th International Conference on Machine Learning & Applications (CMLA 2024) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications of on Machine Learning & Applications.
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.