International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 02 | Feb -2017
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e-ISSN: 2395 -0056 p-ISSN: 2395-0072
EXPERIMENTAL STUDY ON CONCRETE CONTAINING FLY ASH Aayush Choure1, Dr. Rajeev Chandak2
1M.E.-scholar, 2
(structural engineering), department of civil engineering , Jabalpur engineering college Jabalpur India.
Head of the department, department of civil engineering, Jabalpur engineering College Jabalpur India.
---------------------------------------------------------------------***--------------------------------------------------------------------content in excess of 10%. In addition to pozzolanic properties, class c fly ash also possesses cementations In India, currently a large amount of fly ash is properties. Over the past several decades, the use of fly generated mainly in thermal power plants with an imperative ash in concrete has had a successful track record. The blow on environment and living organism. The use of fly ash in performance benefits fly ash provides to mechanical concrete can reduce the consumption of natural resources and and durability properties of concrete have been well also diminishes the effect of pollutant in environment. In researched and documented in actual structures. recent studies, many researchers found that the use of Currently, fly ash is used in more than 50% of all ready additional cementitious materials likes fly ash in concrete is mixed concrete placed in the India, yet many design economical and reliable. This investigation is a part of professionals continue to remain overly restrictive experimental programme carried out to study the utilization when it comes to using fly ash in concrete. of non-conventional building material (fly ash) for
Abstract –
development of new materials and technology. It is aimed at materials which can fulfil the expectations of the construction industry in different areas. In this study, cement has been replaced by fly ash accordingly in the range of 0% ,5%10%,15%, 20% by weight of cement for M-30 mix with 0.43 water cement ratio. The most important mechanical property of concrete is compressive strength and it is evaluated on 150X150X150 mm cubes by The compressive strength is obtained for 28 day strength and results are analyses.
A concrete mix with fly ash can provide environmental and economical benefits. Fly Ash concrete enhances the workability, compressive strength, flexural strength and also increases its pump ability, durability and concrete finishing. It also reduces corrosion, alkali silica reaction, sulphate reaction shrinkage as it decreases its permeability and bleeding in concrete. The disposal of fly ash is a serious environmental problem. A number of studies are going on in India as well as abroad to study the impact of use of these pozzolanic materials as cement replacements and the results are encouraging. Addition of fly ash to concrete has many advantages like high strength, durability and reduction in cement production. The optimum fly ash replacement percentage for obtaining maximum 28- day’s strength of concrete ranged from 5% to 20%. Cement replacement up to 20% with fly ash leads to increase in compressive strength, for M30 grade of concrete. When pozzolanic materials are incorporated to concrete, the silica present in these materials react with the calcium hydroxide released during the hydration of cement and forms additional calcium silicate hydrate (C–S–H), which improve durability and the mechanical properties of concrete. In this paper suitability of fly ash has been discussed by replacing cement with fly ash at varying percentage and the strength parameters were compared with conventional concrete.
Key Words: class F fly ash, Ordinary Portland Cement(O.P.C.), Compressive strength
INTRODUCTION In thermal power stations, mainly two types of ashes are produced from burning of coal. The lighter one goes up the chimney and collected either by mechanical or by electrostatic precipitator is known as fly ash. Portion of fly ash escapes along with hot gases through chimneys. The other fraction containing coarser materials are collected at the bottom of the furnace, is called bottom ash. Fly ash is fine and carried away with flue gases. It is separated from hot gases in Electrostatic precipitator. Fly ash is in two type class f and c, in class f fly ash normally produces by burring anthracite or bituminous coal, usually has less than 5% CaO. Class f fly ash has pozzolanic only and in class c fly ash normally produced by burning lignite or sub bituminous coal. Some class c fly ash may have CaO © 2017, IRJET
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