In civil engineering industry concrete is the most widely used construction material due to its high stability and structural strength. For the objective of reducing the solid waste disposal problem the concrete industry is constantly looking for supplementary cementitious material such as Quarry sand (QS), Rice husk ash (RHA) and Ground granulated blast furnace slag (GGBS) are the solid wastes generated by industry. To overcome from this problem, partial replacement of cement with GGBS and RHA and partial replacement of natural sand (NS) with Quarry sand can be an economic alternative. The research is carried out in total three phase. In first phase, mix of M 30 grade concrete with replacement of 0%,20%,40%,60%,80% and 100% of quarry sand with natural sand is carried out. From this phase to determine the optimum percentage of quarry sand which give maximum compressive strength. It is observed that maximum strength is achieved when natural sand is partially replaced with 60% quarry sand. In second phase, the cement is partially replaced with GGBS by 10%, 20% and 30%. In third phase , combination of GGBS and RHA is partially replaced with cement. It is observed that the composition of 7.5% RHA + 22.5% GGBS+ 60% of quarry sand gives good strength results.

Keywords: Rice husk ash (RHA), Cement(C), Ground granulated blast furnace slag (GGBS), Quarry sand (QS).

I.INTRODUCTION

Concrete is a homogeneous mix of cement, aggregates and water. The global consumption of natural sand