Optimized Flyash in Concrete for Grade M15, M20, M25, M30, M35, M40 Using Portland Slag Cement
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2017, Vol 5, Issue 6
Abstract
Earlier fly ash is being used in concrete with ordinary Portland cement. Optimization of fly ash in concrete by using Portland slag cement have obviously good impact on lowering the cost of concrete as well as consumption of by product and waste material fly ash and slag. Portland slag cement is already blended cement in which slag and clinker are grinded together by adding 65% slag .On one hand using the blended cement in concrete and on other hand using fly ash additionally will great effort to reduce the CO2 emission. This research paper optimized the quantity of fly ash in concrete of grade M15, M20, M25,M30,M35,M40. Portland slag cement confirming IS:455-1989 and high lime fly ash which is categorised as class C fly ash by ASTM, because of its high calcium content ,is used for the each trial mixes of concrete .High lime fly ash will act as binder material along with cement, also it’s pozzolanic nature improves the durability of the concrete. In each mix for each grade of concrete , w/c ratio is kept lower side regarding the concern of maximum w/c ratio criteria as per IS 456-2000.The physical and chemical properties most importantly, its fineness, residue and lime content imparts vital role in water cement ratio and strength parameters in concrete. Several trial mixes is being prepared with varying amount of fly ash for each grade of concrete. For green concrete cohesiveness and workability criteria is maintained without changing the w/c ratio in each grade. To maintain the workable mix, super plasticizer is used. To assess the compressive strength of concrete 06 cubes of each batch,03 cubes for 7 days strength and 03 cubes for 28 days strength is casted, cured and tested. The results are being analysed and compared with standard concrete and conclusions made on how best the fly ash can be utilized to give optimum results.
Authors and Affiliations
Ram Jitendra Kumar, R. C. Singh
Keywords
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