Permeability of Concrete Mix Design

In the present investigation, study of water permeability of concrete was carried out..The strength of concrete is depend on its mix proportions. we used high strength concrete which have its compressive strength is above 50 MPa.in order to measure co-efficient of permeability as per IS:3085-1965,the cylinder with height to diameter ratio equal to one were cast and subjected to a constant pressure 8kg/cm2.The coefficient of permeability was then calculated using Darcy’s law. In the mix ,we are used so many pozzolanic materials for water tightness purposes.it doesn’t affect the density and tensile strength of the concrete. The permeability is a measure of rate of movement of fluids through concrete, and is sometimes even regarded as a direct measure of durability. The understanding of the physical processes of flow of fluids requires knowledge of permeability. The permeability of concrete affects both types of concrete affects both types of structures situated either in moderate environment areas or in coastal areas, the effect more pronounced on the latter ones.