Pozzolanic materials such as fly ash and Alccofine that can be used to produce high durability and good quality concrete. In this study the cement is partially replaced by Alccofine and fly ash for M20 gread of concrete. The compressive strength of the OPC concrete is increased by replacing the cement with Alccofine up to 20% alccofine after there is a reduction in the compressive strength. The compressive strength is tested in 3, 7 and 28 days. Replacement of Alccofine is shows that early strength is gain. The Fly Ashes flies shows that the long-term strength.