Abstract
Concrete is the most widely used construction material in civil engineering industry because of its high structural strength and stability. The concrete industry is looking for supplementary cementitious material or industrial by product with the objective of reducing the carbon dioxide emission which is harmful to environment. Ground granulated blast furnace slag (GGBS) is the solid wastes generated by industry are used as a replacement material for cement. Manufactured sand is used to reduce the excessive natural sand consumption This paper deals with the effective utilization of waste material in concrete production as a partial replacement for cement and complete replacement for sand. The cement has been replaced by GGBS in the range of 20% by weight of cement for M25, M30 and M40 grade mix. Workability test was carried out on fresh properties of concrete while compressive strength was carried on hardened concrete. It is found that the partial replacement of cement with GGBS and complete replacement sand with manufactured sand helped in improving the strength of the concrete substantially compared to normal mix concrete. Compressive strength test was carried out for 7, 14 and 28 days
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