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Abstract: Compressive strength Comparison between OPC, PPC and PSC for continuouscuring is the main area of interest of this paper. OPC, PPC and PSC concrete cubes arecasted as per design mix of characteristics strength M30. These cubes are tested after 7 daysand 28 days. In continuous curing cubes were submerged in water for all time. By observing the result following conclusions were made PSC and PPC gives nearly similar compressive strength after 28 days. This project deals with the comparative study on the strength properties of different types of cement like Ordinary Portland cement, Portland Pozzolanacement and Portland slag cement in concrete. The project aims to investigate the mechanicalproperties like compressive strength and split tensile strength for grade of concrete. The specimens were tested at 7 days and 28 days