Self Compacting Concrete, a new type of high performance concrete have been first developed in Japan. The development of SCC has made casting of complex reinforcement and mass concrete conveniently. This study investigates the mechanical properties of self compacting concrete. The ingredients used for SCC are 53 grade OPC cement, river sand, coarse aggregate, super plasticizer, class-F fly ash from thermal power plant, viscosity modifying agent. Cement is replaced by fly ash at 20% level by weight of cement. Various tests such as slump flow test, U-tube test and L-box test are conducted to study the characteristics of fresh concrete. In this study, we use different mixes to find the mechanical properties of SCC. The super plasticizer mix ratios are 1%, 1.25%, 1.5%, 1.75%, 2%, 2.25%, 2.5% and 2.75% like that VMA mix at 1%. For each mix 6 numbers of cube and 6 numbers of cylinder are cast. The cube used to find the compressive strength and the cylinder used to find split tensile strength.