Pervious Concrete Using Fly ash Aggregate As Coarse Aggregate-An Experimental Study

Abstract

The present study deals with the fabrication of pervious concrete from fly ash aggregates. The pervious concrete were obtained by the mixture of three different size fly ash aggregates (4.75 mm, 9.5 mm, 12.5 mm), Portland cement, water with little amount of sand or without sand. Admixtures like Silica fume(SF) and Super plasticizer are added to the mixture to enhance the strength of concrete. Trial being taken on preparation of Fly ash based pervious concrete (FPC) with different w/c ratio i.e. 0.30, 0.35 and 0.40 respectively. Tests such as porosity, permeability and compressive, strength are studied for this concrete material and the result concluded that the concrete when cured for 28 days its compressive strength falls in between 7.15-15.74 MPa and permeability 9.38-16.07 mm/s with porosity 27.59-34.05% and these are suited to be used as for use as an environment friendly concrete.