International Research Journal of Education and Technology

High Performance Concrete of M30 grade was attempted here with three types of industrial by-products viz. silica fume, bottom ash and steel slag aggregate. The mix design was based on IS: 10262-2009 method and the proportions of cement: fine aggregate: coarse aggregate was 1:1.71:3.13 with water/cement ratio 0.45 and the addition of superplasticizer CONPLAST 430. The replacement materials are silica fume in the replacement percentage of 5%, 10%, 15% and 20% as cement, bottom ash in the replacement percentage of 10%, 20%, 30%, 40% and 50% as fine aggregate and steel slag aggregate in the replacement percentage of 10%, 20%, 30%, 6 40% and 50% as coarse aggregate. Experimental investigations were carried out on 15 sets of concrete mix such as CC, SFC1, SFC2, SFC3, SFC4, BAC1, BAC2, BAC3, BAC4, BAC5, SSAC1, SSAC2, SSAC3, SSAC4, and SSAC5 with 28 days curing and termed as single combination. The mechanical properties such as compressive strength, tensile strength, flexural strength and modulus of elasticity were investigated to find out the optimum replacement percentage levels of industrial by-products. After having found the optimum replacement percentage level, similar investigations were carried out on 5 sets of concrete such as CC, SF (5%) BA (10%), SF (5%) SSA (10%), BA (10%) SSA (10%) and SF (5%) BA (10%) SSA (10%) with different curing days and termed as binary and ternary combination. The compressive strength was determined at the age of 28, 56, 90 and 180 days of curing. The tensile strength and flexural strength were obtained after 28 days of curing. The durability studies such as acid resistance, salt resistance, sulphate resistance, water absorption and rapid chloride penetration test for the selected high performance concrete (HPC) were also carried out in binary and ternary combination. Non-destructive testing (NDT) was carried on the concrete specimens before and after durability tests such as acid resistance, salt resistance, sulphate resistance and rapid chloride penetration. The specimens were examined by the Scanning Electron Microscope (SEM) equipped with an Energy-Dispersive X-ray Spectroscopy (EDS) analytical system to determine the micro-structural characteristics of concrete and composition of the phases identified for HPC mixes of single combination, binary and ternary combination in durability studies

KeyWords: cementitious materials , mineral admixtures, Concrete, Aggregate, Mix Design