Experimental investigation on pervious concrete with metakaolin

Abstract

Pervious concrete is a type of light weight porous concrete with no fine or with small percentage of fine aggregate. It is generally used for flatwork applications, whichallowswater from precipitation and other sources to pass directly through, thereby reducing the runoff from a site and allowing ground water recharge. This study aims to experimentally investigate the mechanical and hydraulic propertiesof pervious concrete with differentreplacementlevels of metakaolin.Pervious concrete for pavement applications having a porosity of 20-25% with cement-aggregate ratio of 1:4 and w/c ratio of 0.36 is established based on permeability, porosity and strength parameters. Metakaolin were incorporated in pervious concrete by replacing cement at 5%, 10% and 15% by weight of cement which helps in increasing the mechanicalproperties of pervious concrete. The strength parameters increased about 12.24%, 23.95%, 13.97%for compressive strength, split tensile strength and flexural strength respectivelyfor 10% metakaolin replacement and hydraulic properties decreased as the percentage of metakaolinincreased.