N EXPERIMENTAL STUDY ON OPTIMUM USAGE OF METAKAOLIN & FLY ASH FOR MAKING OF HIGH-STRENGTH CONCRETE (HSC)

Abstract

The word high strength concrete is defined as concrete that meets special combinations of strength and
uniformity requirements that cannot always be achieved routinely using conventional constituents and normal mixing,
placing, and curing practices. The concrete is widely used in large scale in the construction industry, not only for its
strength and also with the demands of high strength, high performance and high durability at desirable cost and also at
the same time the demand for reducing the usage of cement quantity with partial replacement of other p ozzalanic
materials to save the environment without any deviations in the concrete strength blended cement is introduced into the
construction industry to partial replacement of cement with any other pozzalonic materials to reduce the quantity of
ordinary Portland cement, and also to reduce the cost of concrete. The blended cements are also used to increase the
compressive strength of concrete and sometimes to prepare high performance concrete. In this research work
Metakaolin and Fly ash materials are used for partial replacement of cement. To achieve required strength, the water
cement ratio within the specified range have been selected water cement ratio has 0.45 for and M30 grade of concrete
respectively. The optimum dosage of percentage of replacement of cement with metakaolin was found 30%, 20% and
20% for the constant of cement replacement with fly ash is 10%, 20% and 30% respectively.