Effect of Metakaolin and Fly Ash Addition on Fresh and Hardened Cement Concrete

Abstract

The building material that is most often utilised worldwide is concrete. In infrastructure projects, it is frequently employed. Due to the rapid speed of construction operations in India, the major goal of this study is to find other sources of cement that would lower the amount of cement needed for construction. Cement is partially replaced with metakaolin and fly ash. It has a variety of pozzolanic qualities that have beneficial impacts on the final characteristics of concrete. These characteristics lead calcium hydroxide, a byproduct of cement hydration, to chemically react with the active ingredients.The primary goal of this research is to partially replace OPC with Metakaolin and Fly ash. This research aims to examine the qualities of M-30 grade concrete, concrete manufactured with metakolin, and concrete made with fly ash while they are both fresh and hardened. The weight of cement has partially replaced metakoalin in the ratios of 5%, 10%, 15%, and 20%. The weight of cement has replaced a portion of the fly ash in the amounts of 7.5%, 15%, 22.5%, and 30%. Slump testing is done to investigate the new qualities. Compressive and split tensile strength tests are carried out on concrete after 28 and 56 days of curing to examine its hardened qualities.