Effect of partial replacement of Eco sand on high performance concrete

Abstract

The concrete plays a vibrant role in infrastructural developments. The major dispute of environmental degradation with sources of river sand is been substituted by M sand substantially at faster rate. The efforts to minimize the usage of Portland cement in concrete by other supplementary cementitious materials are also forging to control the environment-related problems. The study involves the behaviour of high performance concrete using partial replacement of cement by silica fume and partial replacement of M sand by Eco sand for M60 grade of concrete. Eco sand is an industrial waste product obtained from the cement industry is utilized as per the gradation analysis to evolve a better waste utilization and management system. The experimental works were conducted to evaluate the mechanical properties of high performance concrete containing cementitious materials of silica fume replaced by cement with 1-5%, M sand replaced by Eco-sand of 15-20%. Super plasticizer also added of about 1% to improve the workability of concrete. The results shows that the compressive strength gradually increased with 25% replacement of Eco sand and the optimal percentage of silica fume replacement identified as 5% by weight. The flexural strength at 28 days shows better for 20% replacement of eco sand than the control mix.