In the development of infrastructure concreteplays a vital role, it is widely used as a building material.Concrete is a mixture of cement, water, coarse aggregate andfine aggregate. Over the last few years, the environment isgreatly affected due to the amount of energy consumed andCO₂ emitted during production of cement, these environmentaland economical issues related to materials production and usehave stimulated interest in the development of alternativematerials which would partially replace cement and improvethe performance of concrete. The materials which can used forpartial replacement could be naturally occurring, industrialwastes or by-products that are less energy intensive. Thesepozzolanic materials when combined with calcium hydroxide,exhibits cementetious properties. This work focuses oninvestigation of durability characteristics of M30 gradeconcrete with partial replacement of cement with groundgranulated blast slag (GGBS) by 20%, 40%, 60% and alccofineby 10%, 12%, 14%. The cubes and cylinders are tested forcompressive strength, water permeability and rapid chloridepenetration test.