Concrete is the most widely used man-made construction material in the world and is consumed second only to water on this planet. It is obtained by mixing the cementitious materials, water and aggregates in the required proportions. However, the various required performance attributes of concrete including strength, workability, dimensional stability and durability, often impose contradictory requirements on the mix parameters to be adopted, there by rendering the concrete mix design a very difficult task.
The increase in global warming has resulted a wide range of change in earth’s temperature, the source being emission of carbon dioxide gas from the production process of cement. Use of naturally available pozzolanic waste materials (fly ash & granite powder) as a partial substitute of OPC cement in mortar mix has seen a wide potential in the utilization of these waste material and also enhancing the properties of mortar mix and thus reducing the environment impact caused by manufacturing of cement. In this study the effect of using fly ash & granite powder is used as a partial substitute of ordinary port-land cement and to reduce the cost of the cement.
An investigation was conducted to determine the suitability of using fly ash (bi-product from thermal power plant) and waste granite powder as partial replacement for cement for concrete production. Apart from the control concrete sample which had 100% cement all the other samples were treated to 20%, 40%, 60%, 80% and 100% replacement of cement with flyash and granite powder. Concrete cubes of 150mmx150mmx150mm, cylinders of 150mm diameter and 300mm height, beams of 100mmx100mmx500mm were made with the various proportions of cement, sand and coarse aggregates in a mix ratio of 1:2.2:3, water -cement ratio of 0.50 and cured over 28 days. The results of compressive strength tests show that the strength of the concrete cubes with varying amounts of cement and fly ash and granite powder changed marginally. This was interpreted to mean that the partial replacement of cement with fly ash and granite powder up to 20% in concrete results in about 1.4% increase in the strength of the concrete. The compressive strength of concrete cubes is 33N/mm2, flexural strength of concrete beams is 5.10 N/mm2 and split tensile strength of concrete cylinder is 2.34 N/mm2 for 20% replacement.
Fly Ash as a Partial Replacement of Cement in Concrete and Durability Study o...IJERD Editor
This document presents research on the use of fly ash as a partial replacement for cement in concrete. Concrete cubes were produced with 0%, 5%, 10%, 15%, and 20% cement replacement by fly ash. The cubes were cured in water as well as 1%, 3%, and 5% sulfuric acid solutions. Compressive strength was tested at 28, 60, and 90 days. Results showed that cubes with 10% fly ash replacement had the highest strength when cured in water and acid solutions. Fly ash concrete also demonstrated improved durability in acidic environments compared to normal concrete. In general, fly ash concrete performed better with increasing curing time and showed potential to enhance concrete durability.
This document discusses ground granulated blast furnace slag (GGBFS), a byproduct of steel production that can be used in concrete production. It has several benefits over traditional Portland cement concrete including greater strength, durability, and sustainability. GGBFS concrete exhibits improved sulfate and chloride resistance, reduces temperatures in large pours, and results in a lighter colored, smoother finish. It also enhances workability and pumpability while requiring less water. Overall, incorporating GGBFS in concrete delivers higher performance while reducing costs and environmental impact.
Fly ash is a byproduct of coal combustion that can be used as a supplementary cementitious material in concrete. There are two main classes of fly ash - Class F contains a greater combination of silica, alumina and iron, while Class C has a higher lime content. Fly ash particles fill voids in concrete, improving workability and reducing water requirements. While fly ash concrete has slightly lower early strength, it achieves higher ultimate strength and is more durable due to reduced permeability and alkali-silica reactivity. Using fly ash in concrete provides benefits like reduced heat of hydration, improved pumpability, and environmentally friendly use of an industrial byproduct.
Alkali-aggregate reaction is the reaction between the active mineral constituents of some aggregates and the alkali hydroxides in concrete. It is only harmful when it produces significant expansion. There are two main forms: alkali-silica reaction and alkali-carbonate reaction.
Alkali-silica reaction, also known as ASR, causes cracking in concrete from the reaction between certain reactive minerals or rocks in aggregates and alkalis in cement. It can cause visible symptoms like cracking and pop outs, which are small fragment breakaways leaving shallow depressions.
Alkali-carbonate reaction is influenced by factors like clay or calcite/dolomite content and crystal size in aggregates.
1. The document discusses various types of special concretes including lightweight concrete, foam concrete, self-compacting concrete, vacuum concrete, fibre reinforced concrete, ferrocement, ready mix concrete, slurry infiltrated fibre concrete (SIFCON), and shotcrete.
2. Lightweight concrete uses lightweight aggregates like shale, clay, or slate to reduce density while maintaining strength. Foam concrete is made by injecting air or gas into the mix to create a cellular structure.
3. Self-compacting concrete can be placed without vibration due to its fluidity. Vacuum concrete has water removed using vacuum mats to increase strength.
Final PPT Partial Replacement of sand with quarry dust in high strength fly a...Sudhanshu Baigra
The main goal of this project was to replace the conventional Red Clay bricks with Fly Ash Bricks.
We know that Bricks are one of the most important parts of any construction project. With the new advancements of the present construction industry, there is a significant need to incorporate the use of industrial and agricultural by-products and waste products along with the traditional construction materials. Recycling such wastes by utilizing them into building materials is a moderate solution for the pollution issues. Sand is getting depleted day by day and in order to save our mineral wealth, in this study it was decided to use Quarry Dust (Waste material) as a replacement for sand instead of using the top most fertile soil for the process of making the bricks which further leads to declining in agricultural soil and in order to save the top most fertile soil and environment, fly ash as a replacement was used. The main intention behind doing the project on High strength Fly ash bricks is to determine the optimum mixture among all the samples of three different batches in order to use that type of bricks for the construction process. After performing all the necessary tests, it can be readily inferred that the sample consisting of 50% Fly Ash, 40% Quarry Dust, 10% Cement & 15% GGBS shows the highest value of the compressive strength among all the bricks i.e., 15.42 MPa (at 28 days of testing) and in case of Water absorption, it was observed that the least water absorption value is obtained in the sample that consists of 50% Fly Ash, 40% Quarry Dust, 10% Cement and 0% GGBS i.e., 6.40% (at 28 days of testing). In the case of bulk density, all the bricks at the age of 28 days of testing achieve the bulk density in the range of 2-2.2 g/cm3 which is generally taken as the ideal value for brick masonry. After going through all the economical and environmental aspects, it was finally concluded that the sample, consists of 50% Fly Ash, 40% Quarry Dust,10% Cement & 0% GGBS.
Recycle material used in road constructionpavan bathani
As the world population grows, so do the amount and type of waste being generated.Many of the waste produced today will remain in environment.The creation of non decaying waste material, combined with a growing consumer population, has resulted in a waste disposal crisis.
One solution to this crisis lies in recycling waste into useful products.
It is try to match society need for safe and economic disposal of waste material with highway industry need for better and more cost effective construction material.
Recycled concrete is made from demolished or renovated concrete structures. The concrete is crushed and any rebar or other materials are removed. Crushed recycled concrete can be used as gravel for construction projects or as the aggregate in new concrete mixtures, providing it is free of contaminants. Using recycled concrete reduces costs and pollution compared to using newly quarried materials, and keeps concrete debris out of landfills. However, recycled concrete has reduced strength and density compared to natural aggregates.
Fly Ash as a Partial Replacement of Cement in Concrete and Durability Study o...IJERD Editor
This document presents research on the use of fly ash as a partial replacement for cement in concrete. Concrete cubes were produced with 0%, 5%, 10%, 15%, and 20% cement replacement by fly ash. The cubes were cured in water as well as 1%, 3%, and 5% sulfuric acid solutions. Compressive strength was tested at 28, 60, and 90 days. Results showed that cubes with 10% fly ash replacement had the highest strength when cured in water and acid solutions. Fly ash concrete also demonstrated improved durability in acidic environments compared to normal concrete. In general, fly ash concrete performed better with increasing curing time and showed potential to enhance concrete durability.
This document discusses ground granulated blast furnace slag (GGBFS), a byproduct of steel production that can be used in concrete production. It has several benefits over traditional Portland cement concrete including greater strength, durability, and sustainability. GGBFS concrete exhibits improved sulfate and chloride resistance, reduces temperatures in large pours, and results in a lighter colored, smoother finish. It also enhances workability and pumpability while requiring less water. Overall, incorporating GGBFS in concrete delivers higher performance while reducing costs and environmental impact.
Fly ash is a byproduct of coal combustion that can be used as a supplementary cementitious material in concrete. There are two main classes of fly ash - Class F contains a greater combination of silica, alumina and iron, while Class C has a higher lime content. Fly ash particles fill voids in concrete, improving workability and reducing water requirements. While fly ash concrete has slightly lower early strength, it achieves higher ultimate strength and is more durable due to reduced permeability and alkali-silica reactivity. Using fly ash in concrete provides benefits like reduced heat of hydration, improved pumpability, and environmentally friendly use of an industrial byproduct.
Alkali-aggregate reaction is the reaction between the active mineral constituents of some aggregates and the alkali hydroxides in concrete. It is only harmful when it produces significant expansion. There are two main forms: alkali-silica reaction and alkali-carbonate reaction.
Alkali-silica reaction, also known as ASR, causes cracking in concrete from the reaction between certain reactive minerals or rocks in aggregates and alkalis in cement. It can cause visible symptoms like cracking and pop outs, which are small fragment breakaways leaving shallow depressions.
Alkali-carbonate reaction is influenced by factors like clay or calcite/dolomite content and crystal size in aggregates.
1. The document discusses various types of special concretes including lightweight concrete, foam concrete, self-compacting concrete, vacuum concrete, fibre reinforced concrete, ferrocement, ready mix concrete, slurry infiltrated fibre concrete (SIFCON), and shotcrete.
2. Lightweight concrete uses lightweight aggregates like shale, clay, or slate to reduce density while maintaining strength. Foam concrete is made by injecting air or gas into the mix to create a cellular structure.
3. Self-compacting concrete can be placed without vibration due to its fluidity. Vacuum concrete has water removed using vacuum mats to increase strength.
Final PPT Partial Replacement of sand with quarry dust in high strength fly a...Sudhanshu Baigra
The main goal of this project was to replace the conventional Red Clay bricks with Fly Ash Bricks.
We know that Bricks are one of the most important parts of any construction project. With the new advancements of the present construction industry, there is a significant need to incorporate the use of industrial and agricultural by-products and waste products along with the traditional construction materials. Recycling such wastes by utilizing them into building materials is a moderate solution for the pollution issues. Sand is getting depleted day by day and in order to save our mineral wealth, in this study it was decided to use Quarry Dust (Waste material) as a replacement for sand instead of using the top most fertile soil for the process of making the bricks which further leads to declining in agricultural soil and in order to save the top most fertile soil and environment, fly ash as a replacement was used. The main intention behind doing the project on High strength Fly ash bricks is to determine the optimum mixture among all the samples of three different batches in order to use that type of bricks for the construction process. After performing all the necessary tests, it can be readily inferred that the sample consisting of 50% Fly Ash, 40% Quarry Dust, 10% Cement & 15% GGBS shows the highest value of the compressive strength among all the bricks i.e., 15.42 MPa (at 28 days of testing) and in case of Water absorption, it was observed that the least water absorption value is obtained in the sample that consists of 50% Fly Ash, 40% Quarry Dust, 10% Cement and 0% GGBS i.e., 6.40% (at 28 days of testing). In the case of bulk density, all the bricks at the age of 28 days of testing achieve the bulk density in the range of 2-2.2 g/cm3 which is generally taken as the ideal value for brick masonry. After going through all the economical and environmental aspects, it was finally concluded that the sample, consists of 50% Fly Ash, 40% Quarry Dust,10% Cement & 0% GGBS.
Recycle material used in road constructionpavan bathani
As the world population grows, so do the amount and type of waste being generated.Many of the waste produced today will remain in environment.The creation of non decaying waste material, combined with a growing consumer population, has resulted in a waste disposal crisis.
One solution to this crisis lies in recycling waste into useful products.
It is try to match society need for safe and economic disposal of waste material with highway industry need for better and more cost effective construction material.
Recycled concrete is made from demolished or renovated concrete structures. The concrete is crushed and any rebar or other materials are removed. Crushed recycled concrete can be used as gravel for construction projects or as the aggregate in new concrete mixtures, providing it is free of contaminants. Using recycled concrete reduces costs and pollution compared to using newly quarried materials, and keeps concrete debris out of landfills. However, recycled concrete has reduced strength and density compared to natural aggregates.
Presentation on Comparative study Of concrete using Recycled coarse aggregatesShanu Aggarwal
The document provides an overview of a comparative study on concrete using recycled coarse aggregates. It discusses the need for recycled aggregates due to shortage of natural aggregates and increasing construction waste. It also explains the process of recycling concrete. The document then reviews several literature studies on properties of concrete with recycled aggregates. It further lists the various experiments conducted as part of the study, including tests on fine and coarse aggregates, cement, and recycled coarse aggregates. The results of sieve analysis, water absorption, crushing value, impact value, specific gravity tests are presented.
This document discusses pozzolana and fly ash in concrete technology. It defines pozzolana as a finely powdered material that can be added to lime or cement mortar to increase durability by chemically reacting with calcium hydroxide. The document lists various natural and manufactured sources of pozzolanic materials including volcanic ash, calcined clay, mineral slag, and ashes of organic origin. It describes how the properties of pozzolanic materials like particle size and chemical composition affect their reactivity and the strength and setting of composites. The document also discusses how pozzolanic reactions enhance concrete properties like stiffness over time and that pozzolanic materials can improve sustainability by enabling the use of industrial and
Hydration is the chemical reaction between cement and water that forms bonds and results in a solid mass. The main compounds in cement - C3S, C2S, C3A, and C4AF - hydrate to form calcium silicate hydrates (C-S-H gel), calcium hydroxide, and calcium aluminate hydrates. Hydration is affected by factors like composition, fineness, water-cement ratio, and curing temperature. Special cements include acid-resistant, blast furnace, expanding, colored, high alumina, hydrophobic, low heat, and oil well cements used for their properties.
Durability is the ability of concrete to resist weathering actions, chemical attacks, and abrasion while maintaining its desired engineering properties. A durable concrete structure withstands deterioration over its design life through exposure to the environment. Factors that influence durability include the water-cement ratio, cement content, cover thickness, type of aggregates used, and curing of the concrete. Permeability is an important indicator of durability, with lower permeability reducing susceptibility to chemical attacks. Proper compaction and curing help reduce the permeability of concrete.
Utilisation of Fly Ash in Cement ConcretePramey Zode
This document discusses the use of fly ash as a partial replacement for cement in concrete. Fly ash is a byproduct of coal combustion in thermal power plants. Using fly ash in concrete can reduce costs, improve workability and durability, and provide environmental benefits by reducing the amount of cement needed. The document examines the chemical properties of fly ash and how it reacts with cement. It recommends using fly ash to replace up to 50% of cement in high-volume fly ash concrete, which can further improve sustainability and concrete performance.
use of blast furnace slag in road construction.pptNagarjunJH
1) Slag concretes developed strength more slowly than OPC concretes at early ages but performed similarly to OPC concrete after 28 days. A hyperbolic model can accurately describe the strength development over time when accounting for curing temperature effects.
2) The addition of blast furnace slag to expansive soils reduces swelling, plasticity, and clay content which mitigates heave.
3) Blast furnace slag can be used as an alternative binder to cement in road construction applications due to its slow setting properties, improving workability during application and long-term strength development.
INVESTIGATION ON FLY ASH AS A PARTIAL CEMENT REPLACEMENT IN CONCRETESk Md Nayar
The use of Portland cement in concrete construction is under critical review due to high
amount of carbon dioxide gas released to the atmosphere during the production of cement. In
recent years, attempts to increase the utilization of fly ash to partially replace the use of Portland
cement in concrete are gathering momentum. Most of this by-product material is currently
dumped in landfills, creating a threat to the environment.
Fly ash based concrete is a ‘new’ material that does not need the presence of Portland
cement as a binder. Instead, the source of materials such as fly ash, that are rich in Silicon (Si)
and Aluminium (Al), are activated by alkaline liquids to produce the binder.
This project reports the details of development of the process of making fly ash-based
concrete. Due to the lack of knowledge and know-how of making of fly ash based concrete in the
published literature, this study adopted a rigorous trial and error process to develop the
technology of making, and to identify the salient parameters affecting the properties of fresh and
hardened concrete. As far as possible, the technology that is currently in use to manufacture and
testing of ordinary Portland cement concrete were used.
Fly ash was chosen as the basic material to be activated by the geopolimerization process
to be the concrete binder, to totally replace the use of Portland cement. The binder is the only
difference to the ordinary Portland cement concrete. To activate the Silicon and Aluminium
content in fly ash, a combination of sodium hydroxide solution and sodium silicate solution was
used.
Manufacturing process comprising material preparation, mixing, placing, compaction and
curing is reported in the thesis. Napthalene-based superplasticiser was found to be useful to
improve the workability of fresh fly ash-based concrete, as well as the addition of extra water.
The main parameters affecting the compressive strength of hardened fly ash-based concrete are
the curing temperature and curing time, The molar H2O-to-Na2O ratio, and mixing time.
Fresh fly ash-based concrete has been able to remain workable up to at least 120 minutes
without any sign of setting and without any degradation in the compressive strength. Providing a
rest period for fresh concrete after casting before the start of curing up to five days increased the
compressive strength of hardened concrete.
The elastic properties of hardened fly ash-based concrete, i,e. the modulus of elasticity,
the Poisson’s ratio, and the indirect tensile strength, are similar to those of ordinary Portland
cement concrete. The stress-strain relations of fly ash-based concrete fit well with the expression
developed for ordinary Portland cement concrete.
Using fly ash as replacement of cement & aggregatehsaam hsaam
This document presents a thesis study on utilizing fly ash as a partial replacement for cement and fine aggregates in concrete. The study was conducted by Mohamad Rkein under the supervision of Professor Sabaratnam Prathapan and Associate Professor Krishnan Kannoorpatti. The study aims to determine the feasibility and effects on mechanical properties of using fly ash to replace cement and fine aggregates in concrete mixtures. Tests were conducted on workability and compressive strength of concrete with varying replacement levels of fly ash at 7, 28, and 56 days. The results indicate that fly ash can effectively be used as a partial replacement material in concrete and may provide benefits to strength properties and reduce environmental impacts.
This document discusses the recycling and reuse of demolished concrete. It begins by defining construction waste and the processes of reuse and recycling. It then discusses the large amount of construction and demolition waste generated in India annually. It emphasizes the necessity of reusing and recycling this waste due to limited natural resources. The document outlines the common processes for collecting, sorting, and treating demolished concrete for reuse. It presents experimental results on the properties and quality of recycled concrete aggregates. Finally, it discusses challenges to using recycled aggregates in India and steps that could be taken to promote reuse of demolished concrete.
Performance Evaluation of Hot Mix Asphalt with Recycled Asphalt Pavement usin...Basavaraj
Performance Evaluation of Hot Mix Asphalt with Recycled Asphalt Pavement using Rejuvenator.
Rejuvenator enhances the binder properties of ecycled asphalt and gives good results.
The document discusses geopolymer concrete as an alternative to traditional Portland cement concrete. It defines geopolymer concrete as a material made through a chemical reaction of aluminosilicate materials like fly ash or slag with an alkaline solution. This reaction forms a three-dimensional polymeric chain and network. In contrast to Portland cement, water is not involved in the chemical reaction and curing of geopolymer concrete. The document outlines the constituents, properties, applications and limitations of geopolymer concrete. It notes the potential for geopolymer concrete to provide environmental benefits over traditional concrete.
why we use fly ash in concrete , production of fly ash, how it improve the fresh and harden properties of concrete
how it react when mix with concrete.
This document discusses using ceramic waste as an aggregate in concrete. It presents the results of an experiment replacing regular aggregate with 10-40% ceramic waste aggregate. The highest compressive strengths were achieved with 10-30% replacement. Replacing over 30% resulted in lower strengths. The conclusion is that ceramic waste can be effectively used in concrete as both sand and coarse aggregate up to certain percentages without negatively impacting strength properties. This reduces waste in the ceramic industry and costs for raw materials in concrete production.
This document discusses recycled aggregate concrete (RAC). It defines RAC as concrete produced using recycled concrete aggregates. These aggregates are produced by crushing waste concrete. The document outlines the characteristics, classification, production process, uses, benefits and conclusions regarding RAC. It finds that RAC has lower strength but can be used for applications like road bases. Using RAC provides benefits like reduced waste and cost savings compared to using natural aggregates.
The largest-volume of recycled material used as construction aggregate is blast furnace and steel furnace slag. Blast furnace slag is either air-cooled (slow cooling in the open) or granulated (formed by quenching molten slag in water to form sand-sized glass-like particles). If the granulated blast furnace slag accesses free lime during hydration, it develops strong hydraulic cementitious properties and can partly substitute for portland cement in concrete. Steel furnace slag is also air-cooled. In 2006, according to the USGS, air-cooled blast furnace slag sold or used in the U.S. was 7.3 million tonnes valued at $49 million, granulated blast furnace slag sold or used in the U.S. was 4.2 million tonnes valued at $318 million, and steel furnace slag sold or used in the U.S. was 8.7 million tonnes valued at $40 million. Air-cooled blast furnace slag sales in 2006 were for use in road bases and surfaces (41%), asphaltic concrete (13%), ready-mixed concrete (16%), and the balance for other uses. Granulated blast furnace slag sales in 2006 were for use in cementitious materials (94%), and the balance for other uses. Steel furnace slag sales in 2006 were for use in road bases and surfaces (51%), asphaltic concrete (12%), for fill (18%), and the balance for other uses
This document provides information on various types of admixtures that are added to concrete mixtures. It discusses chemical admixtures including accelerators, retarders, water reducers, super plasticizers, and air entraining agents. It also discusses mineral admixtures such as fly ash, blast furnace slag, silica fume, and rice husk ash. It provides details on plasticizers and their mechanisms of action in dispersing cement particles. It describes different types of super plasticizers and discusses the purposes and examples of retarders and accelerators. The document concludes with sections on air entraining admixtures and their effects, as well as details on various mineral admixtures including their sources and functions in concrete.
The document discusses the different types of shrinkage that can occur in concrete, including plastic shrinkage, drying shrinkage, autogenous shrinkage, and carbonation shrinkage. Plastic shrinkage causes cracks on the surface of fresh concrete due to evaporation before setting. Drying shrinkage is defined as the contraction of hardened concrete from the loss of capillary water, which can lead to cracking, warping, and deflection without any external loading. In summary, the document outlines the main types of volume changes and shrinkage that concrete undergoes both during the plastic and hardened states.
This document discusses recycled aggregate concrete (RAC). RAC is made from aggregates derived from previously used construction materials, helping to address issues of depletion of natural resources and shortage of dumping sites. It describes the sources of recycled aggregates, their characteristics like lower density and strength, and their classification. The document outlines the process of producing RAC and various applications. It notes benefits like reduced need for virgin aggregates but also drawbacks such as decreased quality and strength of the concrete.
Aggregates make up 65-80% of concrete's volume and are inert fillers that float in the cement paste. Their characteristics impact the performance of fresh and hardened concrete. Aggregates are classified based on size, specific gravity, availability, shape, and texture. Proper aggregate grading leads to a dense, strong concrete mixture. The fineness modulus is a number that indicates an aggregate's grading, and the flakiness index measures elongated particles. Well-graded aggregates with low elongation produce high quality concrete.
IRJET- Review Paper on Partial Replacement of Fine Aggregate by Industrial or...IRJET Journal
This document reviews research on using industrial and mine waste to partially replace fine aggregate in concrete. It summarizes four research papers that tested using various waste materials like limestone waste, marble powder, granite powder, iron powder, stone powder, and marble sludge to replace some percentage of sand in concrete mixes. The papers found that concrete strength generally increased with partial waste material replacement of up to 50% sand. Workability was also maintained. Using these waste materials can help reduce environmental impacts while providing an economical and sustainable concrete alternative.
1) The document studies the use of marble powder as a partial replacement for cement in normal compacting concrete.
2) Five concrete mixes were tested with 0%, 5%, 10%, 15%, and 20% replacement of cement with marble powder to determine compressive, split tensile, and flexural strengths at 7, 28, and 56 days.
3) The results showed that compressive, split tensile, and flexural strengths generally increased up to 10% replacement of cement with marble powder compared to the normal mix without replacement. Higher replacements of 15% and 20% typically showed reduced strengths compared to the 10% replacement mix.
Presentation on Comparative study Of concrete using Recycled coarse aggregatesShanu Aggarwal
The document provides an overview of a comparative study on concrete using recycled coarse aggregates. It discusses the need for recycled aggregates due to shortage of natural aggregates and increasing construction waste. It also explains the process of recycling concrete. The document then reviews several literature studies on properties of concrete with recycled aggregates. It further lists the various experiments conducted as part of the study, including tests on fine and coarse aggregates, cement, and recycled coarse aggregates. The results of sieve analysis, water absorption, crushing value, impact value, specific gravity tests are presented.
This document discusses pozzolana and fly ash in concrete technology. It defines pozzolana as a finely powdered material that can be added to lime or cement mortar to increase durability by chemically reacting with calcium hydroxide. The document lists various natural and manufactured sources of pozzolanic materials including volcanic ash, calcined clay, mineral slag, and ashes of organic origin. It describes how the properties of pozzolanic materials like particle size and chemical composition affect their reactivity and the strength and setting of composites. The document also discusses how pozzolanic reactions enhance concrete properties like stiffness over time and that pozzolanic materials can improve sustainability by enabling the use of industrial and
Hydration is the chemical reaction between cement and water that forms bonds and results in a solid mass. The main compounds in cement - C3S, C2S, C3A, and C4AF - hydrate to form calcium silicate hydrates (C-S-H gel), calcium hydroxide, and calcium aluminate hydrates. Hydration is affected by factors like composition, fineness, water-cement ratio, and curing temperature. Special cements include acid-resistant, blast furnace, expanding, colored, high alumina, hydrophobic, low heat, and oil well cements used for their properties.
Durability is the ability of concrete to resist weathering actions, chemical attacks, and abrasion while maintaining its desired engineering properties. A durable concrete structure withstands deterioration over its design life through exposure to the environment. Factors that influence durability include the water-cement ratio, cement content, cover thickness, type of aggregates used, and curing of the concrete. Permeability is an important indicator of durability, with lower permeability reducing susceptibility to chemical attacks. Proper compaction and curing help reduce the permeability of concrete.
Utilisation of Fly Ash in Cement ConcretePramey Zode
This document discusses the use of fly ash as a partial replacement for cement in concrete. Fly ash is a byproduct of coal combustion in thermal power plants. Using fly ash in concrete can reduce costs, improve workability and durability, and provide environmental benefits by reducing the amount of cement needed. The document examines the chemical properties of fly ash and how it reacts with cement. It recommends using fly ash to replace up to 50% of cement in high-volume fly ash concrete, which can further improve sustainability and concrete performance.
use of blast furnace slag in road construction.pptNagarjunJH
1) Slag concretes developed strength more slowly than OPC concretes at early ages but performed similarly to OPC concrete after 28 days. A hyperbolic model can accurately describe the strength development over time when accounting for curing temperature effects.
2) The addition of blast furnace slag to expansive soils reduces swelling, plasticity, and clay content which mitigates heave.
3) Blast furnace slag can be used as an alternative binder to cement in road construction applications due to its slow setting properties, improving workability during application and long-term strength development.
INVESTIGATION ON FLY ASH AS A PARTIAL CEMENT REPLACEMENT IN CONCRETESk Md Nayar
The use of Portland cement in concrete construction is under critical review due to high
amount of carbon dioxide gas released to the atmosphere during the production of cement. In
recent years, attempts to increase the utilization of fly ash to partially replace the use of Portland
cement in concrete are gathering momentum. Most of this by-product material is currently
dumped in landfills, creating a threat to the environment.
Fly ash based concrete is a ‘new’ material that does not need the presence of Portland
cement as a binder. Instead, the source of materials such as fly ash, that are rich in Silicon (Si)
and Aluminium (Al), are activated by alkaline liquids to produce the binder.
This project reports the details of development of the process of making fly ash-based
concrete. Due to the lack of knowledge and know-how of making of fly ash based concrete in the
published literature, this study adopted a rigorous trial and error process to develop the
technology of making, and to identify the salient parameters affecting the properties of fresh and
hardened concrete. As far as possible, the technology that is currently in use to manufacture and
testing of ordinary Portland cement concrete were used.
Fly ash was chosen as the basic material to be activated by the geopolimerization process
to be the concrete binder, to totally replace the use of Portland cement. The binder is the only
difference to the ordinary Portland cement concrete. To activate the Silicon and Aluminium
content in fly ash, a combination of sodium hydroxide solution and sodium silicate solution was
used.
Manufacturing process comprising material preparation, mixing, placing, compaction and
curing is reported in the thesis. Napthalene-based superplasticiser was found to be useful to
improve the workability of fresh fly ash-based concrete, as well as the addition of extra water.
The main parameters affecting the compressive strength of hardened fly ash-based concrete are
the curing temperature and curing time, The molar H2O-to-Na2O ratio, and mixing time.
Fresh fly ash-based concrete has been able to remain workable up to at least 120 minutes
without any sign of setting and without any degradation in the compressive strength. Providing a
rest period for fresh concrete after casting before the start of curing up to five days increased the
compressive strength of hardened concrete.
The elastic properties of hardened fly ash-based concrete, i,e. the modulus of elasticity,
the Poisson’s ratio, and the indirect tensile strength, are similar to those of ordinary Portland
cement concrete. The stress-strain relations of fly ash-based concrete fit well with the expression
developed for ordinary Portland cement concrete.
Using fly ash as replacement of cement & aggregatehsaam hsaam
This document presents a thesis study on utilizing fly ash as a partial replacement for cement and fine aggregates in concrete. The study was conducted by Mohamad Rkein under the supervision of Professor Sabaratnam Prathapan and Associate Professor Krishnan Kannoorpatti. The study aims to determine the feasibility and effects on mechanical properties of using fly ash to replace cement and fine aggregates in concrete mixtures. Tests were conducted on workability and compressive strength of concrete with varying replacement levels of fly ash at 7, 28, and 56 days. The results indicate that fly ash can effectively be used as a partial replacement material in concrete and may provide benefits to strength properties and reduce environmental impacts.
This document discusses the recycling and reuse of demolished concrete. It begins by defining construction waste and the processes of reuse and recycling. It then discusses the large amount of construction and demolition waste generated in India annually. It emphasizes the necessity of reusing and recycling this waste due to limited natural resources. The document outlines the common processes for collecting, sorting, and treating demolished concrete for reuse. It presents experimental results on the properties and quality of recycled concrete aggregates. Finally, it discusses challenges to using recycled aggregates in India and steps that could be taken to promote reuse of demolished concrete.
Performance Evaluation of Hot Mix Asphalt with Recycled Asphalt Pavement usin...Basavaraj
Performance Evaluation of Hot Mix Asphalt with Recycled Asphalt Pavement using Rejuvenator.
Rejuvenator enhances the binder properties of ecycled asphalt and gives good results.
The document discusses geopolymer concrete as an alternative to traditional Portland cement concrete. It defines geopolymer concrete as a material made through a chemical reaction of aluminosilicate materials like fly ash or slag with an alkaline solution. This reaction forms a three-dimensional polymeric chain and network. In contrast to Portland cement, water is not involved in the chemical reaction and curing of geopolymer concrete. The document outlines the constituents, properties, applications and limitations of geopolymer concrete. It notes the potential for geopolymer concrete to provide environmental benefits over traditional concrete.
why we use fly ash in concrete , production of fly ash, how it improve the fresh and harden properties of concrete
how it react when mix with concrete.
This document discusses using ceramic waste as an aggregate in concrete. It presents the results of an experiment replacing regular aggregate with 10-40% ceramic waste aggregate. The highest compressive strengths were achieved with 10-30% replacement. Replacing over 30% resulted in lower strengths. The conclusion is that ceramic waste can be effectively used in concrete as both sand and coarse aggregate up to certain percentages without negatively impacting strength properties. This reduces waste in the ceramic industry and costs for raw materials in concrete production.
This document discusses recycled aggregate concrete (RAC). It defines RAC as concrete produced using recycled concrete aggregates. These aggregates are produced by crushing waste concrete. The document outlines the characteristics, classification, production process, uses, benefits and conclusions regarding RAC. It finds that RAC has lower strength but can be used for applications like road bases. Using RAC provides benefits like reduced waste and cost savings compared to using natural aggregates.
The largest-volume of recycled material used as construction aggregate is blast furnace and steel furnace slag. Blast furnace slag is either air-cooled (slow cooling in the open) or granulated (formed by quenching molten slag in water to form sand-sized glass-like particles). If the granulated blast furnace slag accesses free lime during hydration, it develops strong hydraulic cementitious properties and can partly substitute for portland cement in concrete. Steel furnace slag is also air-cooled. In 2006, according to the USGS, air-cooled blast furnace slag sold or used in the U.S. was 7.3 million tonnes valued at $49 million, granulated blast furnace slag sold or used in the U.S. was 4.2 million tonnes valued at $318 million, and steel furnace slag sold or used in the U.S. was 8.7 million tonnes valued at $40 million. Air-cooled blast furnace slag sales in 2006 were for use in road bases and surfaces (41%), asphaltic concrete (13%), ready-mixed concrete (16%), and the balance for other uses. Granulated blast furnace slag sales in 2006 were for use in cementitious materials (94%), and the balance for other uses. Steel furnace slag sales in 2006 were for use in road bases and surfaces (51%), asphaltic concrete (12%), for fill (18%), and the balance for other uses
This document provides information on various types of admixtures that are added to concrete mixtures. It discusses chemical admixtures including accelerators, retarders, water reducers, super plasticizers, and air entraining agents. It also discusses mineral admixtures such as fly ash, blast furnace slag, silica fume, and rice husk ash. It provides details on plasticizers and their mechanisms of action in dispersing cement particles. It describes different types of super plasticizers and discusses the purposes and examples of retarders and accelerators. The document concludes with sections on air entraining admixtures and their effects, as well as details on various mineral admixtures including their sources and functions in concrete.
The document discusses the different types of shrinkage that can occur in concrete, including plastic shrinkage, drying shrinkage, autogenous shrinkage, and carbonation shrinkage. Plastic shrinkage causes cracks on the surface of fresh concrete due to evaporation before setting. Drying shrinkage is defined as the contraction of hardened concrete from the loss of capillary water, which can lead to cracking, warping, and deflection without any external loading. In summary, the document outlines the main types of volume changes and shrinkage that concrete undergoes both during the plastic and hardened states.
This document discusses recycled aggregate concrete (RAC). RAC is made from aggregates derived from previously used construction materials, helping to address issues of depletion of natural resources and shortage of dumping sites. It describes the sources of recycled aggregates, their characteristics like lower density and strength, and their classification. The document outlines the process of producing RAC and various applications. It notes benefits like reduced need for virgin aggregates but also drawbacks such as decreased quality and strength of the concrete.
Aggregates make up 65-80% of concrete's volume and are inert fillers that float in the cement paste. Their characteristics impact the performance of fresh and hardened concrete. Aggregates are classified based on size, specific gravity, availability, shape, and texture. Proper aggregate grading leads to a dense, strong concrete mixture. The fineness modulus is a number that indicates an aggregate's grading, and the flakiness index measures elongated particles. Well-graded aggregates with low elongation produce high quality concrete.
IRJET- Review Paper on Partial Replacement of Fine Aggregate by Industrial or...IRJET Journal
This document reviews research on using industrial and mine waste to partially replace fine aggregate in concrete. It summarizes four research papers that tested using various waste materials like limestone waste, marble powder, granite powder, iron powder, stone powder, and marble sludge to replace some percentage of sand in concrete mixes. The papers found that concrete strength generally increased with partial waste material replacement of up to 50% sand. Workability was also maintained. Using these waste materials can help reduce environmental impacts while providing an economical and sustainable concrete alternative.
1) The document studies the use of marble powder as a partial replacement for cement in normal compacting concrete.
2) Five concrete mixes were tested with 0%, 5%, 10%, 15%, and 20% replacement of cement with marble powder to determine compressive, split tensile, and flexural strengths at 7, 28, and 56 days.
3) The results showed that compressive, split tensile, and flexural strengths generally increased up to 10% replacement of cement with marble powder compared to the normal mix without replacement. Higher replacements of 15% and 20% typically showed reduced strengths compared to the 10% replacement mix.
The Journal of MC Square Scientific Research is published by MC Square Publication on the monthly basis. It aims to publish original research papers devoted to wide areas in various disciplines of science and engineering and their applications in industry. This journal is basically devoted to interdisciplinary research in Science, Engineering and Technology, which can improve the technology being used in industry. The real-life problems involve multi-disciplinary knowledge, and thus strong inter-disciplinary approach is the need of the research.
IRJET-Study on Strength and Durability Aspects of Geopolymer ConcreteIRJET Journal
This document summarizes a study on the strength and durability properties of geopolymer concrete using fly ash and ground granulated blast furnace slag (GGBS) as binders to replace cement. Various mix designs were tested with different ratios of fly ash to GGBS. The compressive strength and split tensile strength of the geopolymer concrete cubes increased with an increasing percentage of GGBS in the mix. The highest compressive strength of 66MPa was observed for a mix with a 60% fly ash and 40% GGBS ratio. Additionally, sorptivity tests found that geopolymer concrete has lower water absorption than traditional concrete, indicating better durability. The study demonstrates that geopolymer concrete
An Experimental Investigation on Strengths Characteristics of Concrete with t...ijsrd.com
The present work is directed towards developing a better understanding on strengths characteristics of concrete using as a partial replacement of cement by marble dust powder and sand by stone dust. The Dissertation work is carried out with M30 grade concrete for which the marble powder is replaced by 0%, 5%, 10%, 15%, 20% by weight of cement. For all the mixes compressive, flexural and split tensile strengths are determined at different days of curing apart from this the beams were casted and tested under flexural, the load and deflection are noted simultaneously and also the crack pattern were observed. In addition to this, sand is replaced with stone dust (SD) by 10%, 20% and 30% along with cement is replaced with MP by 0%, 10% and 20% by weight for M30 grades of concrete. Only 3 cubes were casted for various percentage replacements of sand with SD and cement with MP for 7days and 28 days compressive strength. The results of the present investigation indicate that marble dusts incorporation results insignificant improvements in the compressive, flexural and split tensile strengths of concrete and The load carrying capacity of RMP RCC beams {mix2 and mix3} is more compared to RCC conventional beams up to 10% of replacement and also for stone dusts and marble dust incorporation results insignificant improvements in the compressive strengths of concrete up to 20% of SD and 10% of MP of replacement.
An Experimental Investigation on Strengths Characteristics of Concrete with t...IJERA Editor
This document presents an experimental investigation on the strengths characteristics of concrete with partial replacements of cement by marble powder dust and sand by stone dust. Marble powder is used to replace cement by 0%, 5%, 10%, 15%, and 20% by weight, and stone dust is used to replace sand by 10%, 20%, and 30% along with 0%, 10%, and 20% cement replacement by marble powder. Compressive, flexural, and split tensile strengths are tested at 7 and 28 days of curing. The results indicate that marble powder replacement up to 10% improves compressive, flexural, and split tensile strengths. Stone dust and marble powder replacements up to 20% and 10% respectively also improve compressive
This study evaluated replacing coarse concrete aggregates with granite waste. The researchers tested concrete mixtures with 10-30% granite waste replacement. Testing showed compressive strength decreased as granite waste increased, though density and workability were not significantly affected. Overall, using granite waste can reduce environmental impacts of concrete production without compromising performance. Further research is needed to optimize granite waste usage and ensure concrete durability.
This document presents a literature review on the use of manufactured sand as a replacement for natural sand in self-compacting concrete. Several studies that investigated properties of self-compacting concrete made with manufactured sand are summarized. The studies found that workability and strength were generally maintained when replacing up to 30-50% of natural sand with manufactured sand. Higher replacement levels led to reduced strengths. Other studies examined using other materials besides manufactured sand as partial replacements for natural sand, such as seashells, recycled concrete aggregates, and waste tire rubber. Overall, the literature shows that manufactured sand and other materials can partially replace natural sand in self-compacting concrete with minimal effects on properties.
Strength Characteristics of Concrete with Partial Replacement of Coarse Aggre...IJERA Editor
This paper presents the results of concrete mix with partial replacement of fine aggregate by quarry dust and simultaneous partial replacement of coarse aggregate by laterite stone aggregate respectively on compressive strength, split tensile strength, flexural strength and workability of concrete. Concrete mixes containing 0%, 10%, 20%, 25 % and 30%, replacement (by weight) of fine aggregate with quarry dust and simultaneously 25% replacement of coarse aggregate (by weight) with laterite stone were casted in lab and checked for compressive strength, split tensile strength ,flexure strength and workability .This replacement results in making the concrete more economically available
Properties of Glass Fibre Reinforced Geopolymer ConcreteIJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
International Journal of Modern Engineering Research (IJMER) covers all the fields of engineering and science: Electrical Engineering, Mechanical Engineering, Civil Engineering, Chemical Engineering, Computer Engineering, Agricultural Engineering, Aerospace Engineering, Thermodynamics, Structural Engineering, Control Engineering, Robotics, Mechatronics, Fluid Mechanics, Nanotechnology, Simulators, Web-based Learning, Remote Laboratories, Engineering Design Methods, Education Research, Students' Satisfaction and Motivation, Global Projects, and Assessment…. And many more.
Partial Replacement of Cement by Saw Dust Ash in Concrete A Sustainable ApproachIJERD Editor
Concrete industry is one of the largest consumers of natural resources due to which sustainability of concrete industry is under threat. The environmental and economic concern is the biggest challenge concrete industry is facing. In this paper, the issues of environmental and economic concern are addressed by the use of saw dust ash as partial replacement of cement in concrete. Cement was replaced by Saw Dust Ash as 5%, 10%, 15% and 20% by weight for M-25 mix. The concrete specimens were tested for compressive strength, durability (water absorption) and density at 28 days of age and the results obtained were compared with those of normal concrete. The results concluded the permissibility of using Saw Dust Ash as partial replacement of cement up to 10% by weight for particle size of range 90micron.
Experimental Investigation on the Concrete as a Partial Replacement of Fine a...IJSRD
This study experimentally investigated the effect of partially replacing fine aggregate with stone dust and brick dust in concrete. Concrete mixtures were prepared by replacing fine aggregate with stone dust and brick dust from 0% to 25% at increments of 5%. Samples were tested to determine workability and compressive, split tensile, and flexural strengths at 7, 14, and 28 days. Results showed that stone dust and brick dust improved concrete strengths up to 20% replacement, with maximum improvements of 24%, 26%, and 18% for compressive, split tensile, and flexural strengths respectively. Strengths decreased with 25% replacement. It was concluded that 20% replacement of fine aggregate with stone dust and brick dust is optimal.
Utilization of Foundry Waste Sand in the Preparation of Concreteiosrjce
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of mechanical and civil engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in mechanical and civil engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
The document discusses the utilization of foundry waste sand in the preparation of concrete. It presents the results of experiments conducted to study the compressive strength, split tensile strength, and flexural strength of M20 and M25 grade concrete containing 0%, 10%, and 100% replacement of foundry waste sand in place of fine aggregate. The tests were conducted at curing periods of 7, 28, and 56 days. The results showed that 100% replacement of foundry waste sand can be used for M20 and M25 grade concrete based on the compressive strengths achieved at different curing periods being comparable to control mixes. Flexural and split tensile strengths were also found to be comparable between control mixes and mixes with foundry
The document discusses the utilization of foundry waste sand in the preparation of concrete. It presents the results of experiments conducted to study the compressive strength, split tensile strength, and flexural strength of M20 and M25 grade concrete containing 0%, 10%, and 100% replacement of foundry waste sand in place of fine aggregate. The tests were conducted at curing periods of 7, 28, and 56 days. The results showed that 100% replacement of foundry waste sand can be used for M20 and M25 grade concrete based on the compressive strengths achieved at different curing periods being comparable to control mixes. Flexural and split tensile strengths were also found to be comparable between control mixes and those with foundry
Experimental study on strength and durability properties of concrete by using...vikram patel
The document describes an experimental study on using industrial waste to improve the strength and durability of concrete. It discusses replacing natural aggregates with waste tire rubber in concrete. Previous research found reductions in mechanical properties but improvements in durability. The study aims to investigate properties of rubberized concrete and determine an optimum replacement level of aggregates. Tests will be conducted on concrete mixtures with 0-50% coarse aggregate replaced by treated waste rubber to evaluate compressive strength and workability. The results could provide a more sustainable and cost-effective concrete production method while reducing waste.
The document summarizes an experimental investigation into the effects of including glass fibers and ground granulated blast furnace slag (GGBS) in concrete paver blocks. Glass fibers between 0.1-0.4% and GGBS replacements of 10-40% cement were tested. Test results found that compressive strength, flexural strength increased up to 0.2% glass fibers but decreased above that. The optimum glass fiber content was 0.2% and GGBS content was 30% based on test results. Including these materials improved strengths but also increased water absorption slightly within allowable limits.
Comparision of Strength For Concrete With Rock Dust And Natural Sand Concrete...IJERA Editor
The Quarry rock dust can be an economic alternative to the river sand. Quarry Rock Dust can be defined as
residue, tailing or other non-voluble waste material after the extraction and processing of rocks to form fine
particles less than 4.75mm. Usually, Quarry Rock Dust is used in large scale in the highways as a surface
finishing material and also used for manufacturing of hollow blocks and lightweight concrete prefabricated
Elements. This project presents the feasibility of the usage of Quarry Rock Dust as hundred percent substitutes
for Natural Sand in concrete. Design Mix for M30 and M40 has been calculated using IS 10262-2009 for both
conventional concrete and quarry dust concrete. Tests were conducted on cubes, cylinders and beams to study
the strength of concrete by using Quarry Rock Dust and the results were compared with the Natural Sand
Concrete. Cement motor ratios of 1:3 and 1:6 are prepared and observe the percentage of water absorption in
both Quarry Rock Dust and Natural sand for plastering.
EXPERIMENTAL STUDY ON THE BEHAVIOR OF CONCRETE BY PARTIAL REPLACEMENT OF CEME...IRJET Journal
This document summarizes an experimental study that partially replaced cement with groundnut shell ash (GSA) and fine aggregate with granite powder in concrete mixes. The study aimed to evaluate the effects on compressive, flexural, and split tensile strengths at curing periods of 3, 14, and 28 days. Testing found that for a 32% replacement of cement with GSA and 24% replacement of fine aggregate with granite powder, the concrete showed positive results with strengths within specifications. Workability was reduced with increased replacement percentages of GSA and granite powder. The study concluded the maximum replacement proportions that provided adequate strengths were 32% GSA and 24% granite powder.
This document summarizes a study on using waste marble sand as a replacement for natural sand in concrete. The researchers fully replaced natural sand with waste marble sand of size 1-2mm in an M20 grade concrete mix design according to Indian standards. Waste marble sand is a byproduct of the marble industry and disposing of it can cause environmental issues. Using it in concrete could provide an economical and eco-friendly building material. The study found that concrete with waste marble sand achieved higher compressive strength than conventional concrete, likely due to cementitious properties of the marble dust. This suggests waste marble sand is a suitable substitute for natural sand in concrete production.
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“Experimental studies on the characteristics properties of concrete produced by replacing cement with flyash and granite powder
1. Under the Guidance of:
Prof. Nitin Deshpande
Presented By:
Ajeet P. (2GI13CV705)
Saqeeb N. (2GI13CV736)
Zuber M. (2GI13CV751)
Heena J. (2GI12CV443)
DEPARTMENT OF CIVIL ENGINEERING
KLS GIT, BELAGAVI - 590008
“Experimental studies on the characteristics properties of
concrete produced by replacing cement with flyash and
granite powder
2. CONTENTSCONTENTS
Introduction
Importance Of The Present Study
(Need For Replacing Cement By Fly Ash And Granite Powder)
Objectives Of The Project
Literature Review
Materials Used
Material Testing Results
Results And Discussion
Conclusions
Scope For Future Study
References
3.
4. Concrete is versatile, has desirable engineering properties, can be moulded into
any shape and more importantly can be produced with cost-effective materials.
Concrete consists of mainly four ingredients which can be classified into two
groups:
1. Active Group consisting of cement and water.
2. Inactive Group consisting of the fine and coarse aggregates.
The active group is sometimes also called as ‘matrix’ which binds the inactive
ingredients and makes the solid block of concrete.
8. In present days, utilization of flyash in concrete as partial replacement of
cement is gaining immense importance, on account of the improvement
in the long-term durability of concrete combined with ecological benefits.
The use of supplementary cementitious materials (SCMs) like flyash
(FA),granite powder can not only improve the various properties of
concrete both in its fresh and hardened states, but also can contribute
to economy in construction costs.
The major contributor of global warming is cement industry which leads
to the emission of carbon dioxide in the atmosphere as well as using up
high level of energy resources in the production of cement.
There are many advantages of using such industrial wastes, as it
improves the performance of concrete exposed to sulphate environment,
deterioration caused by alkali-aggregate interaction.
9. OBJECTIVES OF THE PROJECTOBJECTIVES OF THE PROJECT
1. In this study, an attempt will be made to replace cement in concrete by
fly ash and waste granite powder, by using various replacement
percentages and study the effect of this replacement on the economy
and strength.
2. In this study, the properties of concrete in the fresh state such as
workability and the properties of concrete in the hardened state such
as compressive strength, tensile strength and flexural strength are
studied by replacing cement in concrete by fly ash and waste granite
powder
10. LITERATURE REVIEWLITERATURE REVIEW
Abhinav Singh et.al, “Effect of partial replacement of cement by flyash and addition of granite
powder on the properties of concrete”
The paper describes a comparative study on effects of concrete properties when OPC 43 of
varying grades were partially replaced by flyash. The main variable investigated in the
study is variation of fly ash dosage of 10%, 20%, 30%, and 40% etc. In this paper, the
study is based on study of compressive strength and flexural strength.
Based on this study compressive strength V/s percentage of replacement and addition of the
mixture curves have been plotted so that concrete mixes of grade M25 with different
percentage of fly ash can be directly designed
M.Vijayalakshmi et.al, “Strength and durability properties of concrete made with granite
industry waste”
carried work on the suitability of granite powder (GP) waste as a substitute material for fine
aggregates in concrete production. The experimental parameter was percentage of granite
powder substitution. Concrete mixtures were prepared by 0%, 10%, 20%, 30%, 40% and
50% etc, of fine aggregate substituted by granite powder waste.
Various mechanical properties such as compressive strength, split tensile strength, flexural
strength; ultrasonic pulse velocity (UPV) and elastic modulus were evaluated.
11. Dr.G.Prince Arulraj et.al, “Granite powder concrete”
The percentages of granite powder added by weight to replace sand by weight
were 0%, 5%, 10%, 15%, 20% and 25%. To improve the workability of concrete
0.5% Super plasticiser was added.
This attempt has been done due to the exorbitant hike in the price of fine aggregate
and its limited availability due to the restriction imposed by the government. The
optimal dosage of replacement is found to be 15%.
T. Felix kala et.al, “Effect of Granite Powder on Strength Properties of Concrete”
The percentage of granite powder added by weight was 0%,20%, 40%, 50% as a
replacement of sand used in concrete and cement was replaced with 7.5% silica fume,
10% fly ash, 10% slag and 1% super plasticiser. In the present study, a significant
increase has been observed in the concrete mix with 25% granite powder (GP25)
together with admixtures (fly ash 10%, slag 10%, silica fume 7.5% and super
plasticiser 1%).
The split tensile strength of granite powder concretes was increases when
admixtures are used, which varies between 2.14 to 6.0 MPa. The range of modulus
of elasticity increase in concrete mixes is 4.11 to 6.84 %, 10.16 to 18.54 %, 8.42 to
14.23 %, 6.17 to 8.65 % and 0.77 to 3.14 % for granite powder 0%, 25%, 50%, 75%
and 100%.The range of flexural strength increases in 3 to 8.73 %, 14 to 21.69 %, 11.43
to 18.34 %, 6.15 to 12.22 % and 0.65 to 4.78 % for granite powder 0%, 25%, 50%, 75%
and 100%.
13. Natural SandNatural Sand
Sand is a naturally occurring granular material composed of finely divided
rock and mineral particles.
As per IS:383-1970;“Natural Sand is Fine aggregate resulting from natural
disintegration of rock and which has been deposited by streams or glacial
agencies”
Fine aggregate is the aggregate most of which passes the 4.75mm I.S sieve
and contains only much coarser materials as permitted.
14. Materials used
1. Cement
2. Fine aggregates
3. Coarse aggregates
4. Flyash
5.Granite powder
1. Cement:
Ordinary Portland Cement (O.P.C) confirming to IS: 12269-1987, ACC Cement 43-Grade
O.P.C procured from a single source was used. The properties of which tested in the
laboratory.
2. Fine aggregate:
As per IS383-1970; the aggregate shall consist of naturally occurring gravel and sand or
their combination. Good quality Zone I fine aggregates were used.
15. 3. Coarse aggregate:
As per IS383-1970; the coarse aggregate shall consist of naturally occurring stones and gravel.
They shall be hard, strong, dense, durable, clear and free from adherent coating. Also it should
be free from injurious amount of disintegrate pieces, alkali, vegetable matter and other harmful
substance. In the present study the locally available aggregates from crusher, consisting of
20mm downsize were used.
16. Flyash and Granite powderFlyash and Granite powder
Flyash is finely divided residue resulting from the combustion of powdered coal and
transported by the flue gases and collected by electrostatic precipitator.
There are two ways that the flyash can be used, one way is to inter grind certain
percentage of fly ash with cement clinker at the factory to produce Portland pozzolana
cement (PPC) and the second way is to use the flyash as an admixture at the time of
making concrete at the site of work. The latter method gives freedom and flexibility to
the user regarding the percentage addition of fly ash.
The specific gravity of the fly ash sample is 2.81.
Granite is a common type of felsic intrusive igneous rock that is granular and phaneritic
in texture. The granite powder is a waste generating during the cutting of granites
stones.
The specific gravity of the granite powder is 3.05.
19. EXPERIMENTATION PROGRAMMEEXPERIMENTATION PROGRAMME
1.CEMENT
a. Normal Consistency
b. Specific gravity
2. FINE AGGREGATE
a. Specific gravity
b. Bulk density
3. COARSE AGGREGATE
a. Specific gravity
b. Bulk density
Ordinary Portland cement - 43 grade
Cement mortar cubes
20. Normal consistency CementNormal consistency Cement
Normal consistency = 34%
% of Water added Penetration of needle (mm)
28 24
30 20
32 15
34 5
21. Specific Gravity Test on CementSpecific Gravity Test on Cement
1. Empty weight of the specific gravity bottle = W1 = 73grams
2. Weight of bottle + half filled with Cement = W2 = 88.5grams
3. Weight of bottle + half filled with Cement + half filled with Kerosene =W3 = 163.5
4. Weight of bottle + Kerosene fully filled = W4 = 152grams
5. Weight of bottle + water fully filled = W5 = 172.5 grams
Specific gravity of cement sample =
(W2-W1) * (W4-W1)
[(W4-W1) – (W3-W2)] * (W5-W1)
= 3.08
22. Specific gravity of Fine AggregateSpecific gravity of Fine Aggregate
Sl. No. Description Sample
1. Empty weight of the pycnometer ‘W1’ 465.6gms
2.
Weight of the pycnometer filled with fine
aggregate ‘W2’
804.2gms
3.
Weight of the pycnometer filled with fine
aggregate and with water ‘W3’
1462.8gms
4.
Weight of the pycnometer filled with full of
water ‘W4’
1255.5gms
5. Specific gravity of fine aggregates 2.57
Formula:
Specific gravity of the fine aggregates; Gs = (W2-W1) / [(W4-W1) - (W3-W2)]
Result:
The specific gravity of the fine aggregate sample was found to be 2.57
23. Bulk density of Fine AggregateBulk density of Fine AggregateObservations:
Height of the cylinder; H = 173 mm
Diameter of the cylinder; D = 150 mm
Volume of the cylinder; V = 3*10-3
m3
Formula:
Bulk density (in kg/lit) = (W2-W1) / V
Result:
Bulk density of fine aggregate in rodded condition = 1600kg/m3
Sl. No. Description Sample
1 Empty weight of the cylinder ‘W1’ 2900gms
2
Weight of the cylinder filled with fine aggregates
‘W2’
7750gms
3 Weight of the aggregates in the cylinder (W2-W1) 4850gms
4 Bulk density of aggregates 1.60 kg/lit
24. Material information:
20mm size aggregates
Calculations:
Bulk Specific gravity= weight of sample in air / Loss of weight of sample in water
= W1 /(W1-(W3-W2))
= 3.0
Specific gravity of Coarse AggregateSpecific gravity of Coarse Aggregate
Sl.No. Description Weight in
gms
1 Weight of the aggregates surface dry sample ‘W1’ 3000
2 Weight of basket suspended in water ‘W2’ 2200
3 Weigh of wire basket + aggregates compacted in three layers + fully
immersed in water, ‘W3’
4200
4 Weight of aggregates suspended in water ‘W3-W2’ 2000
5 Weight of oven dry aggregates in air ‘W4’ 2980
25. Bulk density of Coarse AggregateBulk density of Coarse Aggregate
Material information:
Size of the aggregates
20mm size aggregates
Observations:
Volume of the cylinder; V =3*10-3
m3
Calculations:
Bulk density (in kg/lit) = (W2 – W1) / V
Results:
20mm size aggregates; Bulk density = 1700kg/m3
Sl.No. Description
Weight in gms
(20mm size)
1 Empty weight of the cylinder, ‘W1’ 2900
2
Weight of the cylinder filled with
aggregates, ‘W2’
8066.66
3 Weight of the aggregates in the cylinder (W2-W1) 5166.66
26. Specific gravity test on FlyashSpecific gravity test on Flyash
Sl.No. Description weight
1 Empty weight of the bottle ‘W1’ 53 gms
2 Weight of the bottle filled with water ‘W2’ 151 gms
3 Weight of the bottle filled with kerosene ‘W3’ 129.5 gms
4 Weight of bottle+ Fly ash + kerosene ‘W4’ 142.5 gms
5 Weight of Fly ash ‘W5’ 2.57
Formula:
Specific gravity of kerosene Gk = (W3-W1) / (W2-W1)
Specific gravity of Fly ash Gf = [W5(W3-W1)] / [(W5+W3-W4)(W2-W1)]
Results:
The specific gravity of the Fly ash sample was found to be 2.81.
27. Specific gravity test on Granite powderSpecific gravity test on Granite powder
Sl.No. Description weight
1 Empty weight of the bottle ‘W1’ 53 gms
2 Weight of the bottle filled with water ‘W2’ 150.1 gms
3 Weight of the bottle filled with kerosene ‘W3’ 130 gms
4 Weight of bottle+ granite powder + kerosene ‘W4’ 140 gms
5 Weight of granite powder ‘W5’ 13.5
Formula:
Specific gravity of kerosene Gk = (W3-W1) / (W2-W1)
Specific gravity of granite powder Gg = [W5(W3-W1)] / [(W5+W3-W4)(W2-W1)]
Results:
The specific gravity of the granite powder sample was found to be 3.05.
28. CONCRETE MIX DESIGNCONCRETE MIX DESIGN
Stipulations for proportioning:
Grade Designation : M25
Type of Cement : OPC-43 grade confirming to IS-8112
Maximum nominal size of aggregate : 20mm
Minimum cement content : 300Kg/m3
Maximum cement content : 450 Kg/m3
Maximum water cement ratio : 0.5
Workability : (25 – 50)mm slump
Exposure condition : Moderate
Method of concrete placing : pumping
Degree of supervision : Good
Type of aggregate : Crushed stone aggregate
Chemical admixture type : Nil
29. Test data for materials:
Cement used : OPC-43 Grade confirming to IS-8112
Specific gravity of cement : 3.08
Specific gravity of :
Coarse aggregate Sc = 2.95
Fine aggregate Sf = 2.57
Fine aggregate : Confirming to grading Zone-1 of table 4 of IS 383.
Target strength for mix proportioning:
F’ck = fck + 1.65 S
Where ,
F’ck = targetaverage compressive strength at 28 days
fck = characteristic compressive strength at 28 days
S = standard deviation
From table-1 of IS 10262:2009 , standard deviation = 4 N/mm2
F’ck = f ck + 1.65 S
= 25 + (1.65*4 )
Therefore the target strength = 31.6 N/mm2
30. Selection of water cement ratio:
The water cement ratio adopted is 0.5 .
Selection of water content:
From table 2 of IS 10262:2009 ,
For 20mm angular aggregates ,
Maximum water content = 186 litres ( 25-50mm slump range ) .
Calculation of cement content:
Water cement ratio = 0.5
Cement content = ( 186/0.5) = 372 Kg/m3
As 372 Kg/m3
is greater than 300 Kg/m3
, Hence ok
31. Proportion of volume of coarse aggregate and fine aggregate content:
From table -3 of IS 10262:2009, volume of coarse aggregate corresponding to 20mm size coarse
aggregate and fine aggregate (Zone-1) for water cement ratio of 0.5 = 0.6
For pumpable concrete these value should be reduced by 10 percent,
Volume of coarse aggregate Vg = 0.6*0.9 = 0.54
Volume of fine aggregate content Vf= 1-0.54 = 0.46
Mix calculations:
The mix calculations per unit volume of concrete shall be as follows,
Volume of concrete (a) = 1 m3
Cement volume= ((mass of cement/specific gravity of cement))/1000
(b) = ((372/3.08))/1000 = 0.12 m3
Volume of water = ((mass of water/specific gravity of water))/1000
(c ) = ((186/1))/1000 = 0.186 m3
Volume of all in aggregates = ( a-( b+c )) =(1-(0.12+0.186)) =0.694 m3
Mass of coarse aggregates = 0.694* Vg*Sc*1000
=0.694*0.54*2.95*1000 = 1105.542 Kg
Mass of fine aggregates = 0.694* vf* Sf*1000
=0.694*0.45*2.57*1000 = 820.44 Kg
32. Mix proportion for trial number:
1. Cement = 372 Kg/m3
2. Water = 186 kg/m3
3. Fine aggregates = 820.44 kg/m3
4. Coarse aggregates = 1105.542 Kg/m3
5. Chemical admixture = nil
6. Water cement ratio = 0.5
7. Cement ratio = (372/372) = 1
8. Fine aggregates ratio = (820.44/372) = 2.20
9. Coarse aggregates ratio =( 1105.542/372) = 3
Concrete mix proportion =1 : 2.20 : 3
Water/Cement ratio: 0.5
35. RESULTS AND DISCUSSIONSRESULTS AND DISCUSSIONS
Characteristics properties of concrete produced by partial replacement of cement
with flyash and granite powder in different percentages:
1.Workability (Slump cone test)
2.Compressive strength
3.Flexural strength
4.Split tensile strength and
5.Costs per m3
of the concrete
48. COSTS PER mCOSTS PER m33
OF THE CONCRETEOF THE CONCRETE
For Concretes without Fly ash and granite powder (For 100% cement
W/C= 0.5 and Compressive strength= 25N/mm2
)
Material Proportion Quantity per m3
of
concrete
Unit Rate Cost per m3
of
concrete
Cement (OPC) 1.0 372 Kg Rs. 310/- per bag Rs. 2306/-
Water 0.5 186 liters Nil Nil
F.A
(Sand)
2.2 820.44 Kg Rs. 4000/- per m3
Rs. 1276/-
C.A
(All fractions)
3.0 1105.542 Kg Rs. 3000/- per m3
Rs. 1104/-
Density of concrete = 2484kg/m3
Total Cost per m3
= Rs. 4686/-
49. For Concretes with fly ash and granite powder (20% flyash and granite
powder + 80% cement) (For W/C= 0.5 and Compressive strength=
25N/mm2)
Material Proportion Quantity per m3
of
concrete
Unit Rate Cost per m3
of
concrete
Cement (OPC) 1.00 297 Rs. 310/- per bag Rs. 1846/-
Water 0.50 186 Nil Nil
F.A
(Sand)
2.2 820.44 Kg Rs. 4000/- per m3
Rs. 1276/-
C.A
(All fractions)
3.0 1105.542 Kg Rs. 3000/- per m3
Rs. 1104/-
Fly ash
(Class F)
- 37.2 Rs. 1/Kg Rs. 38/-
Granite powder - 37.2 - -
Density of concrete = 2484 kg/m3
Total Cost per m3
= Rs. 4264/-
50. CONCLUSIONSCONCLUSIONS
Conventional concrete shows at 28 days compressive strength as 41.34
N/mm2
, split tensile strength of 2.736 N/mm2
and flexural strength of 6.88
N/mm2
.
The compressive strength, split tensile strength and flexural strength
marginally decreases with partial replacement cement with fly-ash and
granite powder when compared to that of conventional (control) concretes.
With the increase in fly-ash and granite powder replacement for 40% and
60% percentage, the 28-day cured cube compressive strength decreases
compared to that of conventional (control) concretes.
51. With the increase in fly-ash and granite powder replacement for 40% and 60%
percentage, the split tensile strength and flexural strength decreases
compared to that of conventional (control) concretes.
The 20 % fly-ash and granite powder variation resulted in strength values
above that of the design (31.6 N/mm2
). However the best results were
achieved with 20 % fly-ash and granite powder. The partial replacement
of cement by fly-ash and granite powder can therefore make up to 20%.
The cost per m3
of concrete with 100% Cement is Rs. 4686/- and using
10% fly-ash and 10 % Granite powder is Rs. 4264/- and it will save cost
around Rs. 422/-m3
of concrete.
52. SCOPE FOR FURTHER STUDYSCOPE FOR FURTHER STUDY
1.Durability characteristics such as permeability, sulphate attack, chloride attack and
acidic attack can be studied with partial replacement of Cement by fly-ash and granite
powder.
2.The various percentages like 0%, 2.5%, 5%, 7.5%, 10%, 12.5%, 15%, 17.5%, 20%,
22.5%, 25%, 27.5% and 30% can be studied strength for the respective percentages
can be studied.
53. REFERENCESREFERENCES
1. Dr. G. Prince Arulraj, A. Adin and T. Suresh Kannan (2013), “Strength and durability properties of concrete made with
granite industry waste”, International Journal of engineering science and technology, Vol.3, No.01, ISSN: 2250-3498.
2. T. Felixkala and P. Partheeban (2010), “Granite powder concrete”, Indian journal of science and technology, Vol.3, No.3,
ISSN: 0974- 6846.
3. Y.Yaswanth Kumar, C. M. Vivek and A. Anitha (2015), “Use of granite waste as partial substitute to cement in concrete”,
Indian journal of engineering research and applications, Vol.5, Issue:4, ISSN : 2248-9622.
4. T. Felixkala (2013), “Effect of granite powder on strength properties of concrete”, International journal of engineering and
science, Vol.2, No.36-50, ISSN: 2278- 4721.
5. Abhinav Singh and Dilip Kumar (2014), “Effect of partial replacement of cement by fly ash and addition of granite powder
on the properties of concrete”, International journal of computer & mathematical science, Vol.3, Issue: 5, ISSN: 2357.
6. Prerit Saxena and Rishabh Sharma (2016), “A comparative study on partial replacement of cement with fly ash & granite
powder”, IOSR journal of mechanical and civil engineering, Vol.13, Issue: 13, ISSN: 2278-168.
7. Dr. K. A. Abubaker and Soman. K (2014), “Strength properties of concrete with partial replacement of cement by granite
quarry dust”, International journal of engineering research & technology, Vol. 3, Issue: 9, ISSN: 2278-0181.
8. Shetty M. S., “Concrete Technology: Theory and Practice”, First Edition, Reprint 2005, S. Chand and Company Ltd.
Publication, India.
9. Neville A. M., “Properties of Concrete”, Fourth Edition, 2003, Pearson Education Publication, New Delhi, India
54. IS CODE USED FOR PROJECT WORKIS CODE USED FOR PROJECT WORK
1. IS 383: 1970, “Specification for Coarse and Fine Aggregate from Natural Sources for
Concrete”, Second Revision, Reaffirmed-1997, Bureau of Indian Standards, India.
2. IS 2386: 1963, “Methods of Test for Aggregates for Concrete”, Reaffirmed- 1997,
Bureau of Indian Standards, India
3. IS 10262: 2009, First Revision, “Concrete mix Proportioning-Guidelines”, Bureau of
Indian Standards, India
4. IS: 12269-1987, “Ordinary Portland Cement (O.P.C)”, Bureau of Indian Standards,
India