Basic Ingredients of Conventional concrete are cement, sand and aggregate. Natural sand derived from river bank...

Abstract — this paper presents the variation in the strength of concrete when replacing sand by quarry dust and also effect of inclusion of Fly Ash with the addition Quarry Dust. Slump cone test, carried out on fresh concrete to check the workability while compressive strength, flexural strength, split tensile strength was carried out on hardened concrete. The reduction in the sources of natural sand and the requirement for reduction in the cost of concrete production has resulted in the increased need to identify substitute material to sand as fine aggregates in the production of concretes. In such a situation the Quarry dust can be an economic alternative to the river sand. The study analyses the effect on strength characteristics by various % of quarry dust as a replacement of natural sand in M40 grade concrete and also the combination of various % of quarry dust and Fly ash as a replacement of natural sand and cement in M40 grade concrete. Natural sand is replaced by quarry dust with 0%, 15%, 35%, 55%, and 75 % and in combination Natural sand is replaced by quarry dust with 0%, 15%, 35%, 55%, 75 % & Cement replaced by fly ash with 0%, 5%, 10%, 15 % and 20%. Compressive strength, split tensile strength, and flexural strength were conducted according to Indian standard code procedure. The effect of % of Quarry dust and fly ash in cement concrete is studied in detailed. Test results for each variation are tabulated an