This document summarizes an experimental investigation on producing high performance concrete using a super plasticizer called SASplast SP60. It begins with an introduction to super plasticizers and how they can be used to reduce water in concrete mixes to produce stronger, more durable concrete. It then reviews literature on the development and definitions of high performance concrete. The materials and properties section describes the typical ingredients in high performance concrete including cement, aggregates, admixtures, and how super plasticizers specifically can increase strength by dispersing cement particles. The document provides details on testing and properties of the materials used in producing trial high performance concrete mixes with the aim of obtaining strong, cost-effective and environmentally-friendly concrete.
IRJET- Workability and Strength Properties of SCC Made with Processed RCAIRJET Journal
This document summarizes a study on the workability and strength properties of self-consolidating concrete (SCC) made with processed recycled concrete aggregate (RCA). The study investigated how replacing natural coarse aggregates in SCC with 0-50% RCA in 10% intervals impacted properties. Tests were conducted on M30 and M40 grade SCC mixes. The results showed that workability parameters like flowability and passing ability were influenced by the amount of RCA used. Compressive and tensile strengths generally decreased with higher RCA replacement levels. The study aimed to evaluate the suitability of using RCA in SCC.
IRJET- Use of Brick Dust and Fly Ash as a Replacement of Fine Aggregates in S...IRJET Journal
This document discusses a study on the use of brick dust and fly ash as replacements for fine aggregates in self-compacting concrete. It provides background on self-compacting concrete and its advantages over normal vibrated concrete. The study aims to compare the mechanical properties of self-compacting concrete and normal concrete with various ratios of fly ash and brick dust replacing fine aggregate. A literature review covers research on the effects of paste content and powder-to-water ratio on the properties of self-compacting concrete, as well as using fly ash and brick dust as additions in concrete mixes.
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.
A Study on Properties of Self Compacting Concrete with Slag as Coarse AggregateIRJET Journal
This document presents a study on the properties of self-compacting concrete using blast furnace slag as a coarse aggregate replacement. The study aims to determine the strength characteristics of slag for application in self-compacting concrete. Specimens with 0%, 10%, 20%, 40%, and 60% replacement of natural coarse aggregate with slag aggregate were produced and tested. Workability, compressive strength, and split tensile strength tests were conducted on the specimens. The results were then compared to code requirements to evaluate the performance of self-compacting concrete with slag aggregate replacement.
This document provides a review of pervious concrete. It begins with an abstract that defines pervious concrete as a special type of concrete with a high porosity that allows water to pass through, reducing runoff. The document then reviews several studies on the properties and performance of pervious concrete, including its density, permeability, compressive strength, and ability to reduce stormwater runoff compared to traditional concrete. Key findings from the literature include that pervious concrete density and compressive strength increase as permeability decreases. The document also notes that pervious concrete can help recharge groundwater supplies and reduce the impact of development on vegetation.
EXPERIMENTAL STUDY ON STRENGTH BEHAVIOUR OF SELF COMPACTING CONCRETE USING RE...AM Publications
The construction of modern structures alarming the attention of use of materials with improved properties
in respect of strength, stiffness, toughness and durability. Concrete is one of the most widely used construction material
having several advantages such as high strength, good mould ability and high durability. The major disadvantages of
concrete are its poorer tensile strength and lesser ductility (toughness). Conventional concrete used in building
construction and engineering applications requires compaction to attain strength, durability and homogeneity. The
typical method of compaction, by vibration, generates delays and additional costs in projects and could pose a serious
health hazard due to noise pollution in and around construction sites. Self Compacting Concrete (SCC) is a concrete
which is highly flowble, can flows readily into place, fill the formwork without any compaction and without undergoing
any significant segregation. Recycling is the act of processing the used material for creating a new useful product.
Construction and Demolished waste also generate Recycled Aggregate (RA). Such a Recycled Aggregate proved to be a
reliable alternative to Natural Aggregates (NA) in concrete. There is a growing need for renovation from a usual
consumption based society to a sustainable society owing the natural environment pollution, exhaustion of natural
resources and as decreasing capacity of disposal facilities for final waste. Use of aggregates from Building Demolished
Waste (BDW) in structural concrete is definitely an important stride. Use of RA in developing SCC is certainly a novel
thought towards achieving a sustainable concrete. There is a pressing demand for the use of Recycled Aggregate in
recent concretes, as sustainability is given the highest importance in today’s world. This has necessitated the make use
of Recycled Aggregates in SCC and fibre based SCC. Hence Reinforced Self Compacting Concrete using Recycled
Aggregate with fibres may be a potential material in construction. In order to clearly understand the performance of
such a concrete, there is a call for to study the stress-strain and flexural strength behaviour. The present study focuses
on flexural bond strength behaviour of Fibre Reinforced Self Compacting Concrete by replacing the natural Aggregate
with Recycled Aggregate. BDW is used as coarse aggregate in the concrete, with an aim to achieve sustainable concrete.
Eefect of Compressive Strength with and without Coarse Aggregate using Fly As...IRJET Journal
This document discusses an experimental study on the effects of aggregate size and silica fume on the compressive strength, flexural strength, and split tensile strength of high-strength concrete using fly ash and super plasticizer. Tests were conducted with four different coarse aggregate types in concrete mixes with and without silica fume. The results show that cracks developed around but did not traverse the aggregates in concretes without silica fume. In concretes with silica fume, cracks were less tortuous and fracture occurred in a more brittle manner. The document provides background on the use and production of silica fume as well as its properties.
Performance of High Strength Concrete – Partially Replacing Fine Aggregate wi...IRJET Journal
This document summarizes a research paper that studied the use of manufactured sand (M-sand) as a partial replacement for natural sand in high-strength concrete. The researchers created concrete mixes with M-sand replacing natural sand at 20%, 40%, and 60% replacement rates. The mixes were tested to determine the compressive, split tensile, and flexural strengths. Previous studies have found that M-sand can provide up to 40% cost savings compared to natural sand and exhibits better physical properties for use in concrete. The aim of this study was to determine the optimum replacement level of natural sand with M-sand that provides the highest strengths for a M40 grade high-strength concrete mix.
IRJET- Workability and Strength Properties of SCC Made with Processed RCAIRJET Journal
This document summarizes a study on the workability and strength properties of self-consolidating concrete (SCC) made with processed recycled concrete aggregate (RCA). The study investigated how replacing natural coarse aggregates in SCC with 0-50% RCA in 10% intervals impacted properties. Tests were conducted on M30 and M40 grade SCC mixes. The results showed that workability parameters like flowability and passing ability were influenced by the amount of RCA used. Compressive and tensile strengths generally decreased with higher RCA replacement levels. The study aimed to evaluate the suitability of using RCA in SCC.
IRJET- Use of Brick Dust and Fly Ash as a Replacement of Fine Aggregates in S...IRJET Journal
This document discusses a study on the use of brick dust and fly ash as replacements for fine aggregates in self-compacting concrete. It provides background on self-compacting concrete and its advantages over normal vibrated concrete. The study aims to compare the mechanical properties of self-compacting concrete and normal concrete with various ratios of fly ash and brick dust replacing fine aggregate. A literature review covers research on the effects of paste content and powder-to-water ratio on the properties of self-compacting concrete, as well as using fly ash and brick dust as additions in concrete mixes.
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.
A Study on Properties of Self Compacting Concrete with Slag as Coarse AggregateIRJET Journal
This document presents a study on the properties of self-compacting concrete using blast furnace slag as a coarse aggregate replacement. The study aims to determine the strength characteristics of slag for application in self-compacting concrete. Specimens with 0%, 10%, 20%, 40%, and 60% replacement of natural coarse aggregate with slag aggregate were produced and tested. Workability, compressive strength, and split tensile strength tests were conducted on the specimens. The results were then compared to code requirements to evaluate the performance of self-compacting concrete with slag aggregate replacement.
This document provides a review of pervious concrete. It begins with an abstract that defines pervious concrete as a special type of concrete with a high porosity that allows water to pass through, reducing runoff. The document then reviews several studies on the properties and performance of pervious concrete, including its density, permeability, compressive strength, and ability to reduce stormwater runoff compared to traditional concrete. Key findings from the literature include that pervious concrete density and compressive strength increase as permeability decreases. The document also notes that pervious concrete can help recharge groundwater supplies and reduce the impact of development on vegetation.
EXPERIMENTAL STUDY ON STRENGTH BEHAVIOUR OF SELF COMPACTING CONCRETE USING RE...AM Publications
The construction of modern structures alarming the attention of use of materials with improved properties
in respect of strength, stiffness, toughness and durability. Concrete is one of the most widely used construction material
having several advantages such as high strength, good mould ability and high durability. The major disadvantages of
concrete are its poorer tensile strength and lesser ductility (toughness). Conventional concrete used in building
construction and engineering applications requires compaction to attain strength, durability and homogeneity. The
typical method of compaction, by vibration, generates delays and additional costs in projects and could pose a serious
health hazard due to noise pollution in and around construction sites. Self Compacting Concrete (SCC) is a concrete
which is highly flowble, can flows readily into place, fill the formwork without any compaction and without undergoing
any significant segregation. Recycling is the act of processing the used material for creating a new useful product.
Construction and Demolished waste also generate Recycled Aggregate (RA). Such a Recycled Aggregate proved to be a
reliable alternative to Natural Aggregates (NA) in concrete. There is a growing need for renovation from a usual
consumption based society to a sustainable society owing the natural environment pollution, exhaustion of natural
resources and as decreasing capacity of disposal facilities for final waste. Use of aggregates from Building Demolished
Waste (BDW) in structural concrete is definitely an important stride. Use of RA in developing SCC is certainly a novel
thought towards achieving a sustainable concrete. There is a pressing demand for the use of Recycled Aggregate in
recent concretes, as sustainability is given the highest importance in today’s world. This has necessitated the make use
of Recycled Aggregates in SCC and fibre based SCC. Hence Reinforced Self Compacting Concrete using Recycled
Aggregate with fibres may be a potential material in construction. In order to clearly understand the performance of
such a concrete, there is a call for to study the stress-strain and flexural strength behaviour. The present study focuses
on flexural bond strength behaviour of Fibre Reinforced Self Compacting Concrete by replacing the natural Aggregate
with Recycled Aggregate. BDW is used as coarse aggregate in the concrete, with an aim to achieve sustainable concrete.
Eefect of Compressive Strength with and without Coarse Aggregate using Fly As...IRJET Journal
This document discusses an experimental study on the effects of aggregate size and silica fume on the compressive strength, flexural strength, and split tensile strength of high-strength concrete using fly ash and super plasticizer. Tests were conducted with four different coarse aggregate types in concrete mixes with and without silica fume. The results show that cracks developed around but did not traverse the aggregates in concretes without silica fume. In concretes with silica fume, cracks were less tortuous and fracture occurred in a more brittle manner. The document provides background on the use and production of silica fume as well as its properties.
Performance of High Strength Concrete – Partially Replacing Fine Aggregate wi...IRJET Journal
This document summarizes a research paper that studied the use of manufactured sand (M-sand) as a partial replacement for natural sand in high-strength concrete. The researchers created concrete mixes with M-sand replacing natural sand at 20%, 40%, and 60% replacement rates. The mixes were tested to determine the compressive, split tensile, and flexural strengths. Previous studies have found that M-sand can provide up to 40% cost savings compared to natural sand and exhibits better physical properties for use in concrete. The aim of this study was to determine the optimum replacement level of natural sand with M-sand that provides the highest strengths for a M40 grade high-strength concrete mix.
This document summarizes a study on replacing fine aggregates in self-compacting concrete with brick dust and fly ash. It provides background on self-compacting concrete and its advantages over normal vibrated concrete. A literature review covers previous research on the effects of paste content, powder content, water-to-cement ratio, and use of fly ash and brick dust. The experimental section describes the materials used - cement, brick dust, fly ash, water, and fine aggregates. Tests were conducted on compressive strength, splitting tensile strength, and flexural strength of self-compacting concrete with different ratios of fly ash and brick dust replacement of fine aggregates at 7, 28, and 56 days.
IRJET- Experimental and Numerical Study of Impact Energy Absorption of Sa...IRJET Journal
This document summarizes experimental and numerical research on the impact energy absorption of sandwich composite structures with honeycomb cores for safety-critical applications. Quasi-static and dynamic impact tests were performed on sandwich composites made of woven glass fiber-polyvinyl ester facesheets bonded to polypropylene hexagonal honeycomb cores. Finite element models were validated based on the experimental results and used to evaluate the effect of geometric parameters on dynamic behavior and energy absorption. The research aims to investigate the impact performance of these materials to help assess their suitability for structures requiring impact load suppression and safety.
IRJET- An Expermental Study on Self Compacting Concrete by Replacing by Marbl...IRJET Journal
This study experimentally investigates the use of marble sludge powder and quarry rock dust to replace river sand in self-compacting concrete. Mix designs are developed to create self-compacting concrete using varying replacements of river sand with these industrial wastes. Tests are performed on fresh and hardened concrete to evaluate properties like flowability, compressive strength, and splitting tensile strength. The results show that partial replacements of up to 50% river sand with quarry rock dust and 20% marble sludge powder produce self-compacting concrete with comparable or improved strength and flowability properties compared to normal concrete. Using these industrial wastes helps reduce construction costs and environmental impacts of waste disposal.
IRJET- A Review on Strength Properties of Concrete with Partial Replacement o...IRJET Journal
This document summarizes research on the strength properties of concrete with partial replacement of cement by ground granulated blast furnace slag (GGBS). It first provides background on GGBS, noting that it is a byproduct of iron manufacturing with similar chemical composition to portland cement. The document then reviews literature on the topic, finding that compressive strength of GGBS concrete increased at 40% replacement but decreased with further additions. Experimental results from the study found optimal GGBS replacement is 40% for maximum strength. In conclusion, GGBS can improve concrete strength when used to partially replace cement.
IRJET- An Experimental Investigation on Reinforced Concrete Containing GGBFSIRJET Journal
This document presents an experimental investigation on reinforced concrete containing ground granulated blast furnace slag (GGBFS) as a cement replacement. Beams made of M40 grade concrete with 30% and 40% GGBFS replacement were tested under flexure. The study evaluated the performance of plain concrete and reinforced concrete beams with different reinforcement ratios. The concrete mixtures had water-cement ratios of 0.35 and 0.40. Beams were tested for compressive strength, flexural strength, splitting tensile strength, and durability at ages of 28 and 56 days. Test results are presented and discussed. The study aimed to assess how GGBFS affects the behavior and properties of reinforced concrete beams.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Experimental Analysis of Steel Fiber Reinforced Self Compacting ConcreteIRJET Journal
This document summarizes an experimental study on steel fiber reinforced self-compacting concrete (SFRSCC). The study aimed to analyze the mechanical properties of SFRSCC, including compressive and flexural strength, by varying the amount of steel fibers added. The document provides background on self-compacting concrete and steel fibers. It then describes the materials and methodology used, including mix design and test methods. The results showed that compressive strength increased by 25.75% and flexural strength increased by 19.47% for SFRSCC compared to plain self-compacting concrete, for a steel fiber content of 1.75%.
IRJET- Experimental Review for Suitability Study of Natural Coarse Aggregates...IRJET Journal
This document presents a study on the suitability of using recycled concrete aggregate (RCA) in structural concrete as a replacement for natural coarse aggregates (NCA). The study found that RCA significantly decreased the workability of concrete mixes compared to NCA. Concretes made with 100% RCA produced 36% lower compressive strength and 11.5% lower splitting tensile strength than a control concrete made with only NCA at 28 days. However, recycled concrete was found to be 24% more cost effective than conventional concrete when RCA is free of cost. Therefore, the study concluded that RCA is suitable for use in low-strength structural applications like pavements and retaining walls where overall project costs can be reduced.
This document provides an introduction to self-consolidating concrete (SCC), including its origins in Japan in the 1980s, its key properties of low yield stress and high viscosity, and factors for successful mixes. SCC flows easily but remains homogeneous, eliminating the need for vibration. It enables productivity gains but requires careful quality control. While more expensive initially than conventional concrete, SCC provides economic benefits through reduced labor and improved aesthetics and safety.
STUDY OF MACRO LEVEL PROPERTIES OF SCC USING SILICA FUME AND FLY ASH BY USING...IAEME Publication
This document discusses a study on the macro level properties of self-consolidating concrete (SCC) using silica fume and fly ash. The study aims to investigate the fresh and mechanical properties of SCC mixtures containing 10% silica fume and 25% fly ash as partial replacements for cement. Three SCC mixtures were produced with different fine aggregate fineness moduli (2.5, 2.7, and 2.9). Test results found that the mixture with a fineness modulus of 2.7 satisfied filling and passing ability requirements according to EFNARC standards. Hardened properties, such as compressive, splitting tensile, and flexural strength, were also within specified limits for the mixture with a fin
IRJET- Self Compacting Concrete with Replacement of Flyash Aggregate as Fine ...IRJET Journal
This document discusses a study on developing self-compacting concrete (SCC) using fly ash as a replacement for fine aggregate and lightweight expanded clay aggregate (LECA) as a replacement for coarse aggregate. SCC is a concrete that can flow and consolidate under its own weight without vibration. The study aims to investigate the fresh and hardened properties of SCC mixtures containing LECA and fly ash. Test methods for assessing properties like flowability, passing ability, and segregation resistance of fresh SCC are described. The advantages of using LECA and fly ash in SCC are also summarized.
INFLUENCE OF VISCOSCITY MODIFYING ADMIXTURES ON FRESH AND HARDENED PROPERTIES...Ijripublishers Ijri
The use of self-compacting concrete (scc) in general building and civil engineering constructions is becoming popular
over the years ever since it was invented and guide-lines have been formulated by the efnarc (european federation of
national association representing concrete) in 2005. Although in india, we do not have any specific codal provisions for
scc similar to normal concrete, considerable research has been done in both development of scc and its applications with
various admixtures and fibers to enhance the properties of scc in hardened state. As scc is very sensitive to variations
in moisture content and gradation of aggregates, construction sites face difficulties in free flow of scc.
Accelerate the Strength Gaining Properties of Concrete by using Different Cem...ijtsrd
The present study work was carried out to determine the effect of Non Chlorides Hardening Accelerators with different cementations' materials i.e. OPC and PPC. On concrete mixtures when Non Chlorides Accelerators used in OPC mixtures with water curing, keeping the ascending dose of non chlorides hardening accelerators i.e. 0 , 0.58 , 0.73 , 0.87 .The two strength properties of concrete determined in experimental work namely compressive strength and flexural strength at 7 and 28 days. The effect of accelerators enhancing the flexural strength was found to be fading at later age of concrete which was also observed in case of compressive strength. The maximum percentage gains at 7 and 28 days were 27.18 and 20.48 respectively recorded at maximum dosage of accelerators. In case of PPC mixtures, Non chlorides hardening accelerators rage kept 0 , 0.57 , 0.72 , and 0.85 . In PPC mixtures also moderate to high increase in the flexural and compressive strength was observed at early age with increasing the dosage of accelerators Hence through the result conclusion high early strength concrete mixtures can be obtained by using Non chlorides hardened accelerators and two types of cementations materials i.e. OPC and PPC. With different curing methods namely water curing and curing with membrane forming curing compounds. Rakesh Kumar | Er. Anil Kumar "Accelerate the Strength Gaining Properties of Concrete by using Different Cementtitious Materials, Non- Chlorides Hardning Acceleraters and Water Curing in Rigid Pavement" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd26525.pdfPaper URL: https://www.ijtsrd.com/engineering/civil-engineering/26525/accelerate-the-strength-gaining-properties-of-concrete-by-using-different-cementtitious-materials-non--chlorides-hardning-acceleraters-and-water-curing-in-rigid-pavement/rakesh-kumar
IRJET- Performance of RC Beams Cast using Normal and Self-Compacting Concrete...IRJET Journal
This document presents research on the performance of reinforced concrete (RC) beams made with normal concrete and self-compacting concrete (SCC) with different reinforcement ratios. Trial mixes were developed for normal concrete and SCC to select suitable mixes. Beams were cast using the selected normal and SCC mixes with under, balanced, and over reinforcement ratios. The beams were tested and analyzed according to the Egyptian code of practice (ECP) and American concrete institute (ACI) code to compare deflections. Test results showed differences in cracking and failure loads between experimental, ECP, and ACI analyses of the beams. The research aims to investigate the structural performance of SCC beams compared to normal concrete beams and verify differences between deflection
A Review on Recycled Aggregates as an Alternative Building MaterialIRJET Journal
This document reviews previous research on using recycled aggregates as an alternative building material in concrete. It summarizes the key findings of several studies that investigated the effects of recycled aggregates on concrete properties such as compressive strength, carbonation behavior, tensile strength, water absorption, and durability. The studies found that concrete made with recycled aggregates can achieve similar strengths as concrete with natural aggregates. However, properties like carbonation and water absorption may be negatively affected by the porosity of recycled aggregates. The document concludes that using recycled aggregates is an effective way to reuse construction waste while producing concrete suitable for building applications.
IRJET- Self-Compacting Self-Curing Concrete: A ReviewIRJET Journal
This document provides a literature review on self-compacting self-curing concrete. It begins with an introduction to self-compacting concrete and self-curing concrete. It then reviews several studies on self-compacting concrete, self-curing concrete, and self-compacting self-curing concrete. These studies investigated the effects of different admixtures and curing methods on the workability and strength properties of concrete. The review found that self-compacting self-curing concrete can provide the benefits of both self-compaction and self-curing, resulting in easier placement and strength properties comparable to traditionally cured concrete.
IRJET- High Performance Concrete by using M Sand with Admixture 300IRJET Journal
This document summarizes research into producing high performance concrete by using manufactured sand (M sand) with a 0.5% dosage of admixture 300. The research partially replaces cement with 10% silica fume and 10% fly ash. Tests were conducted on concrete mixtures with varying admixture dosages to evaluate workability, compressive strength, tensile strength, flexural strength, and self-compacting properties. The results showed that concrete with 10% silica fume, 10% fly ash, and 0.5% admixture dosage exhibited the highest strengths while maintaining adequate workability. Using M sand and admixtures provides a stronger and more durable concrete that is also more economical and environmentally friendly.
THEORETICAL BEHAVIOR OF COMPOSITE CONSTRUCTION PRECAST REACTIVE POWDER RC GIR...IAEME Publication
This study displays numerically (or theoretically) investigation by using the finite element models for experimental work of composite behavior for hybrid reinforced concrete slab on girder from locale material in Iraq, ordinary concrete in slab and reactive powder concrete in girder, RPC, with steel fibers of different types (straight, hook, and mix between its), tested as simply supported span subjected under two point loading. Which ANSYS version 15.0 is utilized. By studying the compatibility between the experimental results and the theoretical results. As well as, parametric study of many others variables are investigated by using ANSYS (version 15.0), such as: changing the compressive strength of the slab, changing the main reinforcement of the girder, and changing thickness of resin bond layer between girder and slab.
Study on the Effect of Ggbs & M Sand in Self Compacting oncretetheijes
Conventional concrete is the most widely used construction material throughout the world because of its versality, mouldability, durability, and resistance to fire and energy efficiency. However, its major disadvantages like poor tensile strength, limited ductility and little resistance to cracking resists its use as a structural material. Hence, in order to overcome these difficulties several new materials have been developed in the recent past.Admixtures are ingredients other than water, aggregates, hydraulic cement and fibers that are added to the concrete batch immediately before or during mixing. Mineral admixtures are usually added to concrete in larger amounts to enhance the workability of fresh concrete, to improve resistance of concrete to thermal cracking, alkali-aggregate expansion and sulphate attack and to enable a reduction in cement content. The objective of this study is to evaluate the effectiveness of various mineral admixtures in producing SCC. In this study the scope of GGBS ( Ground granular blast furnace slag ) as a mineral admixture to some percentage replace cement in SCC were studied. The study showed that a maximum of 50% GGBS were able to be used as a mineral admixture without affecting the self-compactability
IRJET- High Strength Reduced Modulus of ConcreteIRJET Journal
This document discusses a study on reducing the modulus of elasticity (stiffness) of high-performance concrete (HPC) without compromising its strength. The study investigates replacing natural coarse aggregate with weathered aggregate in an M50 concrete mix. Tests show that the weathered aggregate concrete has lower modulus of elasticity values compared to traditional concrete mixes, while still maintaining adequate compressive strength. For example, at 28 days the weathered concrete has a 54.6 MPa strength versus 71.25 MPa for traditional concrete, but a lower modulus of elasticity of 2.0 GPa compared to 3.2 GPa. The results indicate that using weathered coarse aggregate is effective for reducing stresses in concrete structures without
Study on Alccofine based High Strength Self-compacting Fibrous Concrete- A re...IRJET Journal
This document provides a review of research on alccofine-based high strength self-compacting fibrous concrete. It begins with an introduction to high strength concrete, fibrous concrete, self-compacting concrete, and the benefits of fibrous reinforced self-compacting concrete. It then summarizes 13 research papers on topics including replacing aggregates with waste materials, using hybrid fibers, determining optimal fiber contents, and using mineral admixtures like fly ash and alccofine. The conclusion discusses how alccofine can increase self-compatibility and early strength of self-compacting concrete mixes and how fibers can improve tensile strength, ductility, and crack resistance.
A Review paper on Ultra High Strength ConcreteIRJET Journal
This document reviews ultra-high strength concrete (UHSC). It discusses how UHSC achieves high compressive strength through the elimination of coarse materials, improved powder packing density, and the addition of steel fibers. The document summarizes several research papers on UHSC that investigated using local materials to reduce costs, its mechanical properties under explosion, and its long-term durability. The conclusion states that UHSC offers high strength, durability and modulus of elasticity compared to normal concrete, making it suitable for applications like high-rise buildings and bridges despite its higher initial costs.
This document summarizes a study on replacing fine aggregates in self-compacting concrete with brick dust and fly ash. It provides background on self-compacting concrete and its advantages over normal vibrated concrete. A literature review covers previous research on the effects of paste content, powder content, water-to-cement ratio, and use of fly ash and brick dust. The experimental section describes the materials used - cement, brick dust, fly ash, water, and fine aggregates. Tests were conducted on compressive strength, splitting tensile strength, and flexural strength of self-compacting concrete with different ratios of fly ash and brick dust replacement of fine aggregates at 7, 28, and 56 days.
IRJET- Experimental and Numerical Study of Impact Energy Absorption of Sa...IRJET Journal
This document summarizes experimental and numerical research on the impact energy absorption of sandwich composite structures with honeycomb cores for safety-critical applications. Quasi-static and dynamic impact tests were performed on sandwich composites made of woven glass fiber-polyvinyl ester facesheets bonded to polypropylene hexagonal honeycomb cores. Finite element models were validated based on the experimental results and used to evaluate the effect of geometric parameters on dynamic behavior and energy absorption. The research aims to investigate the impact performance of these materials to help assess their suitability for structures requiring impact load suppression and safety.
IRJET- An Expermental Study on Self Compacting Concrete by Replacing by Marbl...IRJET Journal
This study experimentally investigates the use of marble sludge powder and quarry rock dust to replace river sand in self-compacting concrete. Mix designs are developed to create self-compacting concrete using varying replacements of river sand with these industrial wastes. Tests are performed on fresh and hardened concrete to evaluate properties like flowability, compressive strength, and splitting tensile strength. The results show that partial replacements of up to 50% river sand with quarry rock dust and 20% marble sludge powder produce self-compacting concrete with comparable or improved strength and flowability properties compared to normal concrete. Using these industrial wastes helps reduce construction costs and environmental impacts of waste disposal.
IRJET- A Review on Strength Properties of Concrete with Partial Replacement o...IRJET Journal
This document summarizes research on the strength properties of concrete with partial replacement of cement by ground granulated blast furnace slag (GGBS). It first provides background on GGBS, noting that it is a byproduct of iron manufacturing with similar chemical composition to portland cement. The document then reviews literature on the topic, finding that compressive strength of GGBS concrete increased at 40% replacement but decreased with further additions. Experimental results from the study found optimal GGBS replacement is 40% for maximum strength. In conclusion, GGBS can improve concrete strength when used to partially replace cement.
IRJET- An Experimental Investigation on Reinforced Concrete Containing GGBFSIRJET Journal
This document presents an experimental investigation on reinforced concrete containing ground granulated blast furnace slag (GGBFS) as a cement replacement. Beams made of M40 grade concrete with 30% and 40% GGBFS replacement were tested under flexure. The study evaluated the performance of plain concrete and reinforced concrete beams with different reinforcement ratios. The concrete mixtures had water-cement ratios of 0.35 and 0.40. Beams were tested for compressive strength, flexural strength, splitting tensile strength, and durability at ages of 28 and 56 days. Test results are presented and discussed. The study aimed to assess how GGBFS affects the behavior and properties of reinforced concrete beams.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Experimental Analysis of Steel Fiber Reinforced Self Compacting ConcreteIRJET Journal
This document summarizes an experimental study on steel fiber reinforced self-compacting concrete (SFRSCC). The study aimed to analyze the mechanical properties of SFRSCC, including compressive and flexural strength, by varying the amount of steel fibers added. The document provides background on self-compacting concrete and steel fibers. It then describes the materials and methodology used, including mix design and test methods. The results showed that compressive strength increased by 25.75% and flexural strength increased by 19.47% for SFRSCC compared to plain self-compacting concrete, for a steel fiber content of 1.75%.
IRJET- Experimental Review for Suitability Study of Natural Coarse Aggregates...IRJET Journal
This document presents a study on the suitability of using recycled concrete aggregate (RCA) in structural concrete as a replacement for natural coarse aggregates (NCA). The study found that RCA significantly decreased the workability of concrete mixes compared to NCA. Concretes made with 100% RCA produced 36% lower compressive strength and 11.5% lower splitting tensile strength than a control concrete made with only NCA at 28 days. However, recycled concrete was found to be 24% more cost effective than conventional concrete when RCA is free of cost. Therefore, the study concluded that RCA is suitable for use in low-strength structural applications like pavements and retaining walls where overall project costs can be reduced.
This document provides an introduction to self-consolidating concrete (SCC), including its origins in Japan in the 1980s, its key properties of low yield stress and high viscosity, and factors for successful mixes. SCC flows easily but remains homogeneous, eliminating the need for vibration. It enables productivity gains but requires careful quality control. While more expensive initially than conventional concrete, SCC provides economic benefits through reduced labor and improved aesthetics and safety.
STUDY OF MACRO LEVEL PROPERTIES OF SCC USING SILICA FUME AND FLY ASH BY USING...IAEME Publication
This document discusses a study on the macro level properties of self-consolidating concrete (SCC) using silica fume and fly ash. The study aims to investigate the fresh and mechanical properties of SCC mixtures containing 10% silica fume and 25% fly ash as partial replacements for cement. Three SCC mixtures were produced with different fine aggregate fineness moduli (2.5, 2.7, and 2.9). Test results found that the mixture with a fineness modulus of 2.7 satisfied filling and passing ability requirements according to EFNARC standards. Hardened properties, such as compressive, splitting tensile, and flexural strength, were also within specified limits for the mixture with a fin
IRJET- Self Compacting Concrete with Replacement of Flyash Aggregate as Fine ...IRJET Journal
This document discusses a study on developing self-compacting concrete (SCC) using fly ash as a replacement for fine aggregate and lightweight expanded clay aggregate (LECA) as a replacement for coarse aggregate. SCC is a concrete that can flow and consolidate under its own weight without vibration. The study aims to investigate the fresh and hardened properties of SCC mixtures containing LECA and fly ash. Test methods for assessing properties like flowability, passing ability, and segregation resistance of fresh SCC are described. The advantages of using LECA and fly ash in SCC are also summarized.
INFLUENCE OF VISCOSCITY MODIFYING ADMIXTURES ON FRESH AND HARDENED PROPERTIES...Ijripublishers Ijri
The use of self-compacting concrete (scc) in general building and civil engineering constructions is becoming popular
over the years ever since it was invented and guide-lines have been formulated by the efnarc (european federation of
national association representing concrete) in 2005. Although in india, we do not have any specific codal provisions for
scc similar to normal concrete, considerable research has been done in both development of scc and its applications with
various admixtures and fibers to enhance the properties of scc in hardened state. As scc is very sensitive to variations
in moisture content and gradation of aggregates, construction sites face difficulties in free flow of scc.
Accelerate the Strength Gaining Properties of Concrete by using Different Cem...ijtsrd
The present study work was carried out to determine the effect of Non Chlorides Hardening Accelerators with different cementations' materials i.e. OPC and PPC. On concrete mixtures when Non Chlorides Accelerators used in OPC mixtures with water curing, keeping the ascending dose of non chlorides hardening accelerators i.e. 0 , 0.58 , 0.73 , 0.87 .The two strength properties of concrete determined in experimental work namely compressive strength and flexural strength at 7 and 28 days. The effect of accelerators enhancing the flexural strength was found to be fading at later age of concrete which was also observed in case of compressive strength. The maximum percentage gains at 7 and 28 days were 27.18 and 20.48 respectively recorded at maximum dosage of accelerators. In case of PPC mixtures, Non chlorides hardening accelerators rage kept 0 , 0.57 , 0.72 , and 0.85 . In PPC mixtures also moderate to high increase in the flexural and compressive strength was observed at early age with increasing the dosage of accelerators Hence through the result conclusion high early strength concrete mixtures can be obtained by using Non chlorides hardened accelerators and two types of cementations materials i.e. OPC and PPC. With different curing methods namely water curing and curing with membrane forming curing compounds. Rakesh Kumar | Er. Anil Kumar "Accelerate the Strength Gaining Properties of Concrete by using Different Cementtitious Materials, Non- Chlorides Hardning Acceleraters and Water Curing in Rigid Pavement" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd26525.pdfPaper URL: https://www.ijtsrd.com/engineering/civil-engineering/26525/accelerate-the-strength-gaining-properties-of-concrete-by-using-different-cementtitious-materials-non--chlorides-hardning-acceleraters-and-water-curing-in-rigid-pavement/rakesh-kumar
IRJET- Performance of RC Beams Cast using Normal and Self-Compacting Concrete...IRJET Journal
This document presents research on the performance of reinforced concrete (RC) beams made with normal concrete and self-compacting concrete (SCC) with different reinforcement ratios. Trial mixes were developed for normal concrete and SCC to select suitable mixes. Beams were cast using the selected normal and SCC mixes with under, balanced, and over reinforcement ratios. The beams were tested and analyzed according to the Egyptian code of practice (ECP) and American concrete institute (ACI) code to compare deflections. Test results showed differences in cracking and failure loads between experimental, ECP, and ACI analyses of the beams. The research aims to investigate the structural performance of SCC beams compared to normal concrete beams and verify differences between deflection
A Review on Recycled Aggregates as an Alternative Building MaterialIRJET Journal
This document reviews previous research on using recycled aggregates as an alternative building material in concrete. It summarizes the key findings of several studies that investigated the effects of recycled aggregates on concrete properties such as compressive strength, carbonation behavior, tensile strength, water absorption, and durability. The studies found that concrete made with recycled aggregates can achieve similar strengths as concrete with natural aggregates. However, properties like carbonation and water absorption may be negatively affected by the porosity of recycled aggregates. The document concludes that using recycled aggregates is an effective way to reuse construction waste while producing concrete suitable for building applications.
IRJET- Self-Compacting Self-Curing Concrete: A ReviewIRJET Journal
This document provides a literature review on self-compacting self-curing concrete. It begins with an introduction to self-compacting concrete and self-curing concrete. It then reviews several studies on self-compacting concrete, self-curing concrete, and self-compacting self-curing concrete. These studies investigated the effects of different admixtures and curing methods on the workability and strength properties of concrete. The review found that self-compacting self-curing concrete can provide the benefits of both self-compaction and self-curing, resulting in easier placement and strength properties comparable to traditionally cured concrete.
IRJET- High Performance Concrete by using M Sand with Admixture 300IRJET Journal
This document summarizes research into producing high performance concrete by using manufactured sand (M sand) with a 0.5% dosage of admixture 300. The research partially replaces cement with 10% silica fume and 10% fly ash. Tests were conducted on concrete mixtures with varying admixture dosages to evaluate workability, compressive strength, tensile strength, flexural strength, and self-compacting properties. The results showed that concrete with 10% silica fume, 10% fly ash, and 0.5% admixture dosage exhibited the highest strengths while maintaining adequate workability. Using M sand and admixtures provides a stronger and more durable concrete that is also more economical and environmentally friendly.
THEORETICAL BEHAVIOR OF COMPOSITE CONSTRUCTION PRECAST REACTIVE POWDER RC GIR...IAEME Publication
This study displays numerically (or theoretically) investigation by using the finite element models for experimental work of composite behavior for hybrid reinforced concrete slab on girder from locale material in Iraq, ordinary concrete in slab and reactive powder concrete in girder, RPC, with steel fibers of different types (straight, hook, and mix between its), tested as simply supported span subjected under two point loading. Which ANSYS version 15.0 is utilized. By studying the compatibility between the experimental results and the theoretical results. As well as, parametric study of many others variables are investigated by using ANSYS (version 15.0), such as: changing the compressive strength of the slab, changing the main reinforcement of the girder, and changing thickness of resin bond layer between girder and slab.
Study on the Effect of Ggbs & M Sand in Self Compacting oncretetheijes
Conventional concrete is the most widely used construction material throughout the world because of its versality, mouldability, durability, and resistance to fire and energy efficiency. However, its major disadvantages like poor tensile strength, limited ductility and little resistance to cracking resists its use as a structural material. Hence, in order to overcome these difficulties several new materials have been developed in the recent past.Admixtures are ingredients other than water, aggregates, hydraulic cement and fibers that are added to the concrete batch immediately before or during mixing. Mineral admixtures are usually added to concrete in larger amounts to enhance the workability of fresh concrete, to improve resistance of concrete to thermal cracking, alkali-aggregate expansion and sulphate attack and to enable a reduction in cement content. The objective of this study is to evaluate the effectiveness of various mineral admixtures in producing SCC. In this study the scope of GGBS ( Ground granular blast furnace slag ) as a mineral admixture to some percentage replace cement in SCC were studied. The study showed that a maximum of 50% GGBS were able to be used as a mineral admixture without affecting the self-compactability
IRJET- High Strength Reduced Modulus of ConcreteIRJET Journal
This document discusses a study on reducing the modulus of elasticity (stiffness) of high-performance concrete (HPC) without compromising its strength. The study investigates replacing natural coarse aggregate with weathered aggregate in an M50 concrete mix. Tests show that the weathered aggregate concrete has lower modulus of elasticity values compared to traditional concrete mixes, while still maintaining adequate compressive strength. For example, at 28 days the weathered concrete has a 54.6 MPa strength versus 71.25 MPa for traditional concrete, but a lower modulus of elasticity of 2.0 GPa compared to 3.2 GPa. The results indicate that using weathered coarse aggregate is effective for reducing stresses in concrete structures without
Study on Alccofine based High Strength Self-compacting Fibrous Concrete- A re...IRJET Journal
This document provides a review of research on alccofine-based high strength self-compacting fibrous concrete. It begins with an introduction to high strength concrete, fibrous concrete, self-compacting concrete, and the benefits of fibrous reinforced self-compacting concrete. It then summarizes 13 research papers on topics including replacing aggregates with waste materials, using hybrid fibers, determining optimal fiber contents, and using mineral admixtures like fly ash and alccofine. The conclusion discusses how alccofine can increase self-compatibility and early strength of self-compacting concrete mixes and how fibers can improve tensile strength, ductility, and crack resistance.
A Review paper on Ultra High Strength ConcreteIRJET Journal
This document reviews ultra-high strength concrete (UHSC). It discusses how UHSC achieves high compressive strength through the elimination of coarse materials, improved powder packing density, and the addition of steel fibers. The document summarizes several research papers on UHSC that investigated using local materials to reduce costs, its mechanical properties under explosion, and its long-term durability. The conclusion states that UHSC offers high strength, durability and modulus of elasticity compared to normal concrete, making it suitable for applications like high-rise buildings and bridges despite its higher initial costs.
RECENT INNOVATIONS IN HIGH VOLUME FLY ASH CONCRETE: A REVIEWIRJET Journal
This document provides a literature review of recent innovations in high volume fly ash concrete. It discusses how high volume fly ash concrete can provide improved mechanical and durability properties compared to conventional concrete when using mineral admixtures like fly ash, GGBS, silica fume, and limestone powder. The literature review revealed that curing time, fly ash content, choice and content of mineral admixtures are the main factors controlling properties. While research has shown benefits of high volume fly ash concrete, challenges remain regarding optimal mineral admixture selection and content.
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
Ultra-high-performance fiber-reinforced concrete. Part II Hydration and micro...Shakerqaidi
This document summarizes a review article on ultra-high-performance fiber-reinforced concrete (UHPFRC). It discusses UHPFRC's hydration, microstructure, advantages, and disadvantages. Regarding hydration and microstructure: Cement hydrates similarly to traditional concrete but produces a denser matrix due to lower water content and finer supplementary cementitious materials. Increased curing temperature hastens hydration. The microstructure is highly dense and compact, with a tight fiber-matrix interface. Hydration products like calcium silicate hydrate contribute to a thick microstructure. The review aims to advance understanding of UHPFRC to promote further research and applications.
EFFECT ON MECHANICAL PROPERTIES OF CONCRETE USING FINE AGGREGATE AS PARTIAL R...IRJET Journal
This document investigates the effect of using fly ash as a partial replacement for fine aggregate in concrete. Fly ash is a byproduct of coal combustion in thermal power plants and its utilization remains low. The study designs concrete mixes with fly ash replacing fine sand at percentages between 46-54%. The compressive strength, flexural strength, split tensile strength, and modulus of elasticity of the concrete mixes are then tested at 7 and 28 days. The results are analyzed to understand the impact of different fly ash replacement levels on the mechanical properties of concrete.
IRJET - Experimental and Analytical Study on High Strength Concrete (M70)...IRJET Journal
This document presents the results of an experimental study on high-strength concrete (M70) using recycled concrete aggregate (RCA). Tests were conducted to determine the effect of different percentages (10%, 20%, 30%) of coarse RCA on the concrete's compressive strength, durability, and engineering properties. The results showed that replacement of up to 30% coarse RCA had no effect on concrete strength, but higher percentages led to gradual strength reductions. However, with adjustments to the water-cement ratio, high-strength concrete with RCA can achieve equivalent performance to concrete with natural aggregates. The study aims to establish RCA concrete as a viable and sustainable construction material.
MECHANICAL CHARACTERISTICS OF RECYCLED AGGREGATE AND MINERALS ADMIXED HIGH-PE...IRJET Journal
This document summarizes a study on the mechanical characteristics of recycled aggregate and mineral-admixed high-performance concrete. The study used recycled aggregates and two minerals, silica fume and fumed silica, in a high-performance concrete mix design. The concrete mixtures were tested for compressive strength, tensile strength, and flexural strength at different ages. The results showed that both silica fume and fumed silica can improve the strength properties of high-performance concrete when used as partial replacements of cement. The study aims to evaluate how recycled aggregates and mineral admixtures can lead to more sustainable high-performance concrete mixes.
Analytical Investigation of Flexural Behaviour of SCC Beam Using Eco SandIRJET Journal
This document analytically investigates the flexural behavior of self-consolidating concrete (SCC) beams using partial replacements of fine aggregate with eco sand. Finite element analysis was conducted using ANSYS software to analyze deflection and von mises stress in SCC beams containing eco sand. Experimental testing of simply supported beams validated the numerical and analytical results. The study found that eco sand can partially replace fine aggregate in SCC while maintaining adequate mechanical properties and flexural strength.
IRJET- Feasible Study on Self Compacting ConcreteIRJET Journal
This document summarizes a study on the use of fly ash and silica fume in self-compacting concrete. Self-compacting concrete is able to flow and fill forms under its own weight without vibration. The study aims to evaluate the effects of incorporating fly ash and silica fume on the fresh, strength, and durability properties of self-compacting concrete. Concrete mixtures containing varying proportions of fly ash and silica fume were tested to determine their compressive, tensile, and flexural strengths as well as slump flow and V-funnel tests. The results were then analyzed to assess the impact of fly ash and silica fume additions on the properties of self-compacting concrete.
How to Guarantee Design-Life of Concrete Structures-MasterBuilder-July 2016Dr.Subramanian Narayanan
1) Concrete structures designed for 50-60 years of service life often deteriorate more quickly, with maintenance costs comprising 40-50% of construction spending in some places.
2) Roman structures like the Pantheon, built over 2000 years ago using slow-hardening lime cements, remain in excellent condition, while 20th century structures using Portland cement often deteriorate within 10-20 years.
3) To reliably achieve 100+ year design lives, concrete must be properly specified, mixed, placed, compacted and cured, rather than just focusing on short-term strength as was common practice.
IRJET- Experimental Study on Self Compacting Concretre by Partial Replacement...IRJET Journal
This study experimentally investigates the use of palm oil fuel ash (POFA) as a partial replacement for cement in self-compacting concrete. POFA is a waste product from the palm oil industry in Malaysia. The study replaces cement with 0%, 10%, 20%, 30%, and 50% POFA by weight of cement, keeping a water-binder ratio of 0.40. Fresh and hardened properties are evaluated, including filling ability, passing ability, compressive strength, flexural strength, and split tensile strength. Test results show that replacing up to 30% of cement with POFA does not significantly reduce strength. This suggests POFA has potential as a supplementary cementitious material to reduce the cost of self-comp
Experimental evaluation of the durability properties of high performanceIAEME Publication
The document discusses the use of admixtures to improve the durability properties of high performance concrete (HPC). It describes how supplementary cementing materials (SCMs) like fly ash, silica fume, and metakaoline can improve the strength and durability of HPC when used to partially replace cement. The document also examines the acid resistance and sulfate resistance of HPC specimens containing these admixtures through immersion testing in acid and sulfate solutions. Test results showed that HPC with SCMs exhibited greater resistance to chemical attacks compared to plain cement concrete.
Experimental evaluation of the durability properties of high performanceIAEME Publication
The document discusses the use of admixtures to improve the durability properties of high performance concrete (HPC). It describes how supplementary cementing materials (SCMs) like fly ash, silica fume, and metakaoline can improve the strength and durability of HPC when used to partially replace cement. The document also examines the acid resistance and sulfate resistance of HPC mixtures containing various SCMs through experimental testing of specimens exposed to acids and sulfate solutions.
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.
COST EFFECTIVENESS OF HIGH PERFORMANCE CONCRETEIRJET Journal
This document compares the cost effectiveness of using high performance concrete versus normal concrete for building construction. It discusses how high performance concrete can provide structural benefits like reduced member sizes, self-weight, and foundation costs. The document outlines a study that analyzed a multi-story building modelled in ETABS to compare concrete usage, steel reinforcement needs, and costs when using concrete grades from M20 to M40. It was found that using high performance concrete for columns and other load-bearing elements proved to be the most cost-effective option by reducing both the total volume of concrete and total construction costs.
IRJET- Study on Self Compacting Concrete using Recycled Aggregate as Part...IRJET Journal
This document presents the results of a study on the effects of adding marble dust and steel fibers to concrete. The study investigated the impact on compressive strength, split tensile strength, and flexural strength. Concrete cubes, cylinders, and beams were cast with varying percentages of marble dust replacing cement and steel fibers added. Testing at 28 days showed that replacing 10% of cement with marble dust and adding up to 1% steel fibers increased the compressive, split tensile, and flexural strengths of the concrete compared to normal concrete without additions. The optimal mix was found to be 10% marble dust and 1% steel fibers.
An Analytical and Experimental Investigation of Ultimate Load Carrying capaci...IRJET Journal
This document presents the results of a study investigating the performance of self-compacting concrete containing furnace slag. Self-compacting concrete has advantages in technical, economic and environmental areas. The study aims to replace furnace slag for fine aggregates in self-compacting concrete mixtures. Experimental tests were conducted on concrete cubes, cylinders and prisms with furnace slag replacements ranging from 0-20% to determine the effects on mechanical properties. The results showed that concrete achieves optimal strength at a particular furnace slag replacement percentage, beyond which strength is reduced. Finite element analysis was also used to model and analyze reinforced concrete columns.
EXPERIMENTAL STUDY ON SELFCOMPACTING RC BEAMS REINFORCED WITH POLY-VINYL MESH...IRJET Journal
This document summarizes an experimental study that tested self-compacting concrete (SCC) beams reinforced with poly-vinyl chloride (PVC) mesh wrapped around the reinforcement on alternating phases. The study aimed to observe the behavior and feasibility of using PVC for wrapping reinforcement. Beams made with conventional SCC and beams with double spaced reinforcement wrapped in PVC mesh on alternating phases were cast and tested. Test results found that the beams with PVC wrapped reinforcement had similar load-deflection behavior and ultimate load capacity as the conventional SCC beam. The use of PVC mesh did not negatively impact the structural behavior of the beam.
Similar to IRJET- Experimental Investigation on High Performance Concrete with SASplast SP60 (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.
Software Engineering and Project Management - Software Testing + Agile Method...Prakhyath Rai
Software Testing: A Strategic Approach to Software Testing, Strategic Issues, Test Strategies for Conventional Software, Test Strategies for Object -Oriented Software, Validation Testing, System Testing, The Art of Debugging.
Agile Methodology: Before Agile – Waterfall, Agile Development.
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024Sinan KOZAK
Sinan from the Delivery Hero mobile infrastructure engineering team shares a deep dive into performance acceleration with Gradle build cache optimizations. Sinan shares their journey into solving complex build-cache problems that affect Gradle builds. By understanding the challenges and solutions found in our journey, we aim to demonstrate the possibilities for faster builds. The case study reveals how overlapping outputs and cache misconfigurations led to significant increases in build times, especially as the project scaled up with numerous modules using Paparazzi tests. The journey from diagnosing to defeating cache issues offers invaluable lessons on maintaining cache integrity without sacrificing functionality.
Digital Twins Computer Networking Paper Presentation.pptxaryanpankaj78
A Digital Twin in computer networking is a virtual representation of a physical network, used to simulate, analyze, and optimize network performance and reliability. It leverages real-time data to enhance network management, predict issues, and improve decision-making processes.
Build the Next Generation of Apps with the Einstein 1 Platform.
Rejoignez Philippe Ozil pour une session de workshops qui vous guidera à travers les détails de la plateforme Einstein 1, l'importance des données pour la création d'applications d'intelligence artificielle et les différents outils et technologies que Salesforce propose pour vous apporter tous les bénéfices de l'IA.
Null Bangalore | Pentesters Approach to AWS IAMDivyanshu
#Abstract:
- Learn more about the real-world methods for auditing AWS IAM (Identity and Access Management) as a pentester. So let us proceed with a brief discussion of IAM as well as some typical misconfigurations and their potential exploits in order to reinforce the understanding of IAM security best practices.
- Gain actionable insights into AWS IAM policies and roles, using hands on approach.
#Prerequisites:
- Basic understanding of AWS services and architecture
- Familiarity with cloud security concepts
- Experience using the AWS Management Console or AWS CLI.
- For hands on lab create account on [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
# Scenario Covered:
- Basics of IAM in AWS
- Implementing IAM Policies with Least Privilege to Manage S3 Bucket
- Objective: Create an S3 bucket with least privilege IAM policy and validate access.
- Steps:
- Create S3 bucket.
- Attach least privilege policy to IAM user.
- Validate access.
- Exploiting IAM PassRole Misconfiguration
-Allows a user to pass a specific IAM role to an AWS service (ec2), typically used for service access delegation. Then exploit PassRole Misconfiguration granting unauthorized access to sensitive resources.
- Objective: Demonstrate how a PassRole misconfiguration can grant unauthorized access.
- Steps:
- Allow user to pass IAM role to EC2.
- Exploit misconfiguration for unauthorized access.
- Access sensitive resources.
- Exploiting IAM AssumeRole Misconfiguration with Overly Permissive Role
- An overly permissive IAM role configuration can lead to privilege escalation by creating a role with administrative privileges and allow a user to assume this role.
- Objective: Show how overly permissive IAM roles can lead to privilege escalation.
- Steps:
- Create role with administrative privileges.
- Allow user to assume the role.
- Perform administrative actions.
- Differentiation between PassRole vs AssumeRole
Try at [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
VARIABLE FREQUENCY DRIVE. VFDs are widely used in industrial applications for...PIMR BHOPAL
Variable frequency drive .A Variable Frequency Drive (VFD) is an electronic device used to control the speed and torque of an electric motor by varying the frequency and voltage of its power supply. VFDs are widely used in industrial applications for motor control, providing significant energy savings and precise motor operation.
AI for Legal Research with applications, toolsmahaffeycheryld
AI applications in legal research include rapid document analysis, case law review, and statute interpretation. AI-powered tools can sift through vast legal databases to find relevant precedents and citations, enhancing research accuracy and speed. They assist in legal writing by drafting and proofreading documents. Predictive analytics help foresee case outcomes based on historical data, aiding in strategic decision-making. AI also automates routine tasks like contract review and due diligence, freeing up lawyers to focus on complex legal issues. These applications make legal research more efficient, cost-effective, and accessible.
Embedded machine learning-based road conditions and driving behavior monitoringIJECEIAES
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
Generative AI Use cases applications solutions and implementation.pdfmahaffeycheryld
Generative AI solutions encompass a range of capabilities from content creation to complex problem-solving across industries. Implementing generative AI involves identifying specific business needs, developing tailored AI models using techniques like GANs and VAEs, and integrating these models into existing workflows. Data quality and continuous model refinement are crucial for effective implementation. Businesses must also consider ethical implications and ensure transparency in AI decision-making. Generative AI's implementation aims to enhance efficiency, creativity, and innovation by leveraging autonomous generation and sophisticated learning algorithms to meet diverse business challenges.
https://www.leewayhertz.com/generative-ai-use-cases-and-applications/
Rainfall intensity duration frequency curve statistical analysis and modeling...bijceesjournal
Using data from 41 years in Patna’ India’ the study’s goal is to analyze the trends of how often it rains on a weekly, seasonal, and annual basis (1981−2020). First, utilizing the intensity-duration-frequency (IDF) curve and the relationship by statistically analyzing rainfall’ the historical rainfall data set for Patna’ India’ during a 41 year period (1981−2020), was evaluated for its quality. Changes in the hydrologic cycle as a result of increased greenhouse gas emissions are expected to induce variations in the intensity, length, and frequency of precipitation events. One strategy to lessen vulnerability is to quantify probable changes and adapt to them. Techniques such as log-normal, normal, and Gumbel are used (EV-I). Distributions were created with durations of 1, 2, 3, 6, and 24 h and return times of 2, 5, 10, 25, and 100 years. There were also mathematical correlations discovered between rainfall and recurrence interval.
Findings: Based on findings, the Gumbel approach produced the highest intensity values, whereas the other approaches produced values that were close to each other. The data indicates that 461.9 mm of rain fell during the monsoon season’s 301st week. However, it was found that the 29th week had the greatest average rainfall, 92.6 mm. With 952.6 mm on average, the monsoon season saw the highest rainfall. Calculations revealed that the yearly rainfall averaged 1171.1 mm. Using Weibull’s method, the study was subsequently expanded to examine rainfall distribution at different recurrence intervals of 2, 5, 10, and 25 years. Rainfall and recurrence interval mathematical correlations were also developed. Further regression analysis revealed that short wave irrigation, wind direction, wind speed, pressure, relative humidity, and temperature all had a substantial influence on rainfall.
Originality and value: The results of the rainfall IDF curves can provide useful information to policymakers in making appropriate decisions in managing and minimizing floods in the study area.
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...IJECEIAES
Climate change's impact on the planet forced the United Nations and governments to promote green energies and electric transportation. The deployments of photovoltaic (PV) and electric vehicle (EV) systems gained stronger momentum due to their numerous advantages over fossil fuel types. The advantages go beyond sustainability to reach financial support and stability. The work in this paper introduces the hybrid system between PV and EV to support industrial and commercial plants. This paper covers the theoretical framework of the proposed hybrid system including the required equation to complete the cost analysis when PV and EV are present. In addition, the proposed design diagram which sets the priorities and requirements of the system is presented. The proposed approach allows setup to advance their power stability, especially during power outages. The presented information supports researchers and plant owners to complete the necessary analysis while promoting the deployment of clean energy. The result of a case study that represents a dairy milk farmer supports the theoretical works and highlights its advanced benefits to existing plants. The short return on investment of the proposed approach supports the paper's novelty approach for the sustainable electrical system. In addition, the proposed system allows for an isolated power setup without the need for a transmission line which enhances the safety of the electrical network
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.