It is nowadays used in cement, concrete and other cement based applications in india. Using fly ash in concrete is environmentally beneficial because it reduces the portland cement a major contributor of co2 required in concrete. Fly ash based geopolymer concrete can be the potential to reduce portland cement usage but at the same time acquiring the desirable engineering properties of portland cement concrete. The project that is the subject of this report was a part of the national cooperative. Fly ash is commonly used in concrete in replacements ranging from 0 to 30 percent by mass of the total cementitious material. Fly ash can substitute up to 66% of cement in the construction of dams. Reduction of cement usage will reduce the production of cement. Lowcalcium astm class f fly ash is preferred as a source material than highcalcium astm class c fly ash. Many countries have their own national standards and specifications regulating the use of fly ash in concrete. Th is article addresses some optimal ways of specifying. Further, use of fly ash as a value added material as in the case of geopolymer concrete, reduces the consumption of cement. Failures of fly ash settling ponds, like the 2008 tva spill, are extremely rare events, and in any case, only dry fly ash is used in concrete not wet material in settling ponds.
Uses, benefits, and drawbacks of fly ash in construction. Manufacture of cement is highenergy intensive industry. Seminar report on effect of fly ash and silica fume on. The future of fly ash use in concrete national precast. Ea rly use of fly ash was in mass concrete in hungry horse dam 1948 1953. Compressive strength of concrete with fly ash whrp 00924 the hydration of blended. This report gives an overview of the origin and properties of fly ash, its effect on the properties of hydraulic cement concrete, and the proper selection and use of fly ash in the production of hydraulic cement concrete and concrete products. Fly ash may be used as a partial replacement for the cement. Seminar report on effect of fly ash and silica fume on concrete. Evaluation of the physical and chemical properties of fly ash. Download the latest pdf and ppt on slideshare for civil projects. Fly ash is a fine, glass like powder recovered from the gases of coal fired electricity production inexpensive replacement of portland cement. Latest seminars topics ppt with pdf report 2020 can i get ppt and seminar report on usage of domestic treated effluent in concrete mixing and curing.
The use of fly ash in portland cement concrete pcc has many benefits and improves concrete performance in both the fresh and hardened state. Fly ash is a byproduct from the combustion of pulverized coal, and is widely used as an ingredient in hydrauliccement concrete. Fly ash is used in various proportions ranging from 10% to 50% by weight of cement in steps of 5%. First used in construction of hungry horse dam in usa.
Sip 4 restrictions on type and characteristics of fly ash. Seminar report on flyash concrete linkedin slideshare. The proposed unite will be using both type of fly ash depends upon the availbality 4. Examples of use of fly ash in concrete 1 fly ash concrete was used in prudential building the first tallest building in chicago after world war ii. Currently, more than 50% of the concrete placed in the u. This report provides the resident engineer with recommendations to ensure the production of quality concrete con taining fly ash for structural applications. Green concrete seminar ppt with pdf report study mafia. The performance benefits fly ash provides to mechanical and durability properties of concrete have been well researched and documented in actual structures. One of the most common uses of fly ash is in portland cement concrete pavement or pcc pavement. The main benefit of fly ash for concrete is that it not only reduces the amount of nondurable calcium hydroxide lime, but in the process converts it into calcium silicate hydrate csh, which is the strongest and most durable portion of the. Use of fly ash in road works results in reduction in construction cost by about 10 to 20 per cent. A task force was convened at the 2016 meeting of the aashto subcommittee on materials som for the purpose of documenting the issues facing the coal industry and their impact on the production of fly ash, especially as related to use in structural and paving concrete by the dots. The research for this paper is based on a thorough examination and consolidation of publicly available information and is not supported by original scientific research. Optimizing the use of fly ash in concrete portland cement.
In m ass concrete dams fly ash was used as a one 1 part replacement of one 1 part cement. Because it improves many desirable properties of concrete, it is introduced either as a separately batched material or as a component of blended cement. Fly ash can be used as prime material in many cementbased products, such as poured concrete, concrete block, and brick. The content of this report reflects the views of the authors who. Fly ash is a byproduct from coalfired power plants that is frequently used as an admixture in concrete to replace a portion of the portland cement. It is a fine residue resembling cement that is a byproduct of burning coal in an electric power generating plant. The seminar report on selfcompacting concrete which explains the mix design, advantages and disadvantages, applications, properties,process of making selfconsolidating concrete, theoretical and experimental studies with test results. Typically, class f fly ash is used at dosages of 15% to 25% by mass of cementitious material and class c fly ash at 15% to 40%. Steel fibre reinforced concrete seminar ppt with pdf report. Download replacement of cement by ash seminar reports. Water used in commixture or curing shall be clean and free from deleterious amounts of oil, salt, or other deleterious substances. Fly ash reacts with the hydrating hydraulic cement to form a cementing medium. The materials availed in the test were the normal portland cement, silica fume and fly ash. Class c fly ash is not permitted the calcium oxide cao content of fly ash shall not exceed xx% the loss on ignition loi of fly ash shall not exceed x.
Most of these recommendations form part of a larger nrmca publication that should be released later in 2008. The relative cost of column section designed with opc as well as various proportion of fly ash is estimated and compared. Class f fly ash reduces alkali silica reactivity because of. Sufficiently cured fly ash concrete has a dense structure and hence more resistance to deleterious substances. First used in 1929 in the construction of the hoover dam.
A properly proportional fly ash and silica fume in concrete mix improves properties of the concrete that may not be achievable through the use of portland cement alone. Fly ash has been used in roadways and interstate highways since the early 1950s. Cement concrete and fly ash based concrete has been made. In 1974, the federal highway administration encouraged the use of fly ash in concrete pavement with notice n 5080. This research report describes the longterm properties of lowcalcium fly ash based geopolymer concrete. It saves the cement requirement for the same strength thus saving of raw materials such as limestone, coal etc required for manufacture of cement. Bendable concrete seminar report, ppt, pdf for civil. Download replacement of cement by ash seminar reports, ppt, pdf, replacement of cement by ash seminar topics, abstracts, full documentation, source code. Also explore the seminar topics paper on effect of cement replacement by silica fume and fly ash with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil. Disposal of fly ash has the objective of saving vast amount of land meant for ash pond to store fly ash. The last 50 years has seen the use of fly ash in concrete grow dramatically with close to 15 million tons used in concrete, concrete products and grouts in the u. Pdf class f fly ash assessment for use in concrete pavements.
This version of concrete is made up from the mix of the industrial waste and inorganic polymer. Field investigation of highvolume fly ash hvfa concrete in pavement construction was carried out. Control of corrosion on underwater piles seminar and ppt with pdf report. Road construction projects using pcc can use a great deal of concrete, and substituting fly ash provides significant economic. Influence of flyash on strength of concrete containing isf slag a project report submitted in partial fulfilment of the requirement for. After six months of curing, all the concrete samples exhibited lower sorptivity, due to a longer period of curing allowing the binders to hydrate properly and reduce the capillary pores. Fly ash is a fine, glass like powder recovered from the gases of coal fired electricity production. Crouch1, ryan hewitt1, ben byard1 1 tennessee technological university, box 5015, cookeville, tn 38505 keywords. Effect of cement on silica fume and flyash seminar reports.
Currently, fly ash is used in more than 50% of all ready mixed concrete placed in the. Patidar for giving me such a wonderful opportunity to expand my. Earlier, the research report gc1 presented the development, the mixture proportions, and the shortterm properties of lowcalcium fly ash based geopolymer concrete. Explore bendable concrete with free download of seminar report and ppt in pdf and doc format. The most commonly used way to produce green concrete is by using the industrial waste products such as fly ash. The fly ash concrete exhibited about 91, 84, 75 and 70% of control concrete shrinkage respectively with 10, 20, 30 and 40% fly ash content. Methods for evaluating fly ash for use in highway concrete presents suggested changes to coal fly ash specifications and test protocols contained in american association of state highway and transportation officials aashto standard specifications for transportation materials and methods of sampling and testing aashto m 295. In the united states, astm c 6181, standard specification for coal fly ash and.
Fly ash in concrete contributes to a stronger, more durable, and more chemical resistant concrete mix. Dosage rates vary depending on the type of fly ash and its reactivity level. More recent studies have shown that highvolume fly ash concrete having more than 50% cement replacement with either class c or class f fly ash can be proportioned to meet strength requirements for structural applications naik et al. Field investigation of highvolume fly ash pavement concrete. Effect of cement replacement by silica fume and fly ash.
Using the experimental data, a column section is designed. Also explore the seminar topics paper on bendable concrete with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil construction btech, be, mtech students for the year 2015 2016. Methods for evaluating fly ash for use in highway concrete. And lastly, the epa has not indicated any desire to restrict fly ash use in concrete. Use custom search function to get better results from our thousands of pages use for compulsory search eg. Fly ash in concrete pavement concrete construction. Case study on manufacturing of concrete from ready mix concrete plant and cost analysis on flyash blended concerete. However, research has shown that using a 50 percent or greater replacement of fly ash can have a wide range of benefits. The presence of calcium in high amounts may interfere with the polymerization process and alter the microstructure 7,8, and hence compromise. Methods for evaluating fly ash for use in highway concrete presents suggested changes to coal fly ash specifications and test protocols contained in american association of state highway and transportation officials aashto standard specifications for transportation materials and methods of sampling and. Download replacement of cement by ash seminar reports, ppt, pdf, replacement of cement by. Cem iiv portland fly ash cement 635% fly ash cem iilll portlandlimestone cement 635% limestone cem iii blastfurnace cement 3695% blastfurnace slag cem iv pozzolanic cement 1155% pozzolan including fly ash bs en 263, silica fume for concrete each of these standards has two parts. The scope of this paper is limited to fly ash in concrete and does not address fly ash in other building products.
Test results performed on cores drilled from pavement after 270 days of concrete age showed that use of hvfa results in production of pavement concrete with improvements in. Effect of class f fly ash on the durability properties of. The properties of fly ash can greatly affect the properties for both fresh concrete and hardened concrete. Jul 17, 2017 fly ash is a byproduct from coalfired power plants that is frequently used as an admixture in concrete to replace a portion of the portland cement. Improves strength,segregation and ease of pumping the concrete. Oct 23, 2015 environmental benefits of fly ash use in concrete use of fly ash in concrete imparts several environmental benefits and thus it is ecofriendly. In india, first used in rihad dam high volume fly ash is of current interest.
Presented by dylan kennedy, clayton murray, and eric sandberg. Summary of effects of fly ash on concrete properties, 6. Pdf effects of silica fume and fly ash on the properties. Effect of fly ash on groundgranulated blast furnace slag based geopolymer concrete conference paper pdf available february 2018 with 697 reads how we measure reads. Class c and f fly ashes were used in this research project. Chapter 3 fly ash in portland cement concrete fly ash. Fly ash use in concrete improves the workability of plastic concrete, and the strength and durability of hardened concrete. Fly ash is available free of cost at the power plant and hence only transportation cost, laying and rolling cost are there in case of fly ash. This paper is deals primarily with lowcalcium fly ash based geopolymer concrete. Effect of cement on silica fume and flyash seminar. Bags of premixed cement and fly ash with superplasticiser in dry form incorporated will be a further aid to making such green concrete easier to use for common masses. Also explore the seminar topics paper on effect of cement replacement by silica fume and fly ash with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee. Partial replacement of cement by using waste fly ash. Ubco engr 325 project presentation on fly ash in concrete.
In the test, the quantity of the polymer and the steel fiber changes but the fly ash and silica fume persist same. For 30% or less, abrasion resistance was comparable to that of the control mix. Pdf high strength high volume fly ash concrete researchgate. Fly ash fly ash is the most widely used pozzolan in concrete. Typical restrictions to fly ash seen in specifications for concrete include. Trbs national cooperative highway research program nchrp 749. Effects of silica fume and fly ash on the properties of high performance concrete conference paper pdf available june 2005 with 1,019 reads how we measure reads. Explore effect of cement replacement by silica fume and fly ash with free download of seminar report and ppt in pdf and doc format. The results show that the concern with fly ash supply is. Typically cost of borrow soil varies from about rs. Green concrete is that type of concrete that is used to create the construction materials having a lesser effect on the environment. The resulting concrete mix becomes strong, durable and economical and also ecofriendly as it utilizes an ecological hazardous material.
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