The main objective of this paper is to find out alternative materials for concrete to meet the demands of coarse aggregate for the upcoming years, to provide adequate strength at minimum cost, to make the eco-friendly structures. In the present study, blast furnace steel slag is used in concrete grade of M60 with W/C ratio of 0.28 for the replacement of 0 to 100% coarse aggregate by steel slag aggregate to find out the optimum ratio of steel slag. The optimum mix proposition for the compressive strength of high performance concrete was determined. The mechanical properties such as spilt tensile strength, flexural strength was calculated for optimum mix proportion of M60 grade concrete and compared with the conventional mix. The durability characteristics of high performance steel slag concrete and conventional mix was studied.