An experimental investigation was carried out to evaluate the influence of GGBFS on mechanical properties of Self curing concrete for M30 and M20 Grade. In this work cement is replace by 20% of GGBFS. The poly ethylene glycol 400 is used as self curing admixture with 0,0.5,1,1.5,2% by weight of cementitious materials the optimum dosage of poly ethylene glycol 400 is find out for M30 and M20 Grade . Concrete is evaluated for compressive strength, split tensile strength and flexural strength at different ages 7 days, 28 days and 56 days. The strengths of normal curing and self curing concrete are compared.