Effect of Aggregate Gradation on Hydraulic Properties of Pervious Concrete and Fly Ash as SCM

Abstract

This paper deals with the hydraulic properties of pervious concrete with the effect of coarse aggregate gradation and fly ash as SCM. Initially, mixes were categorized into three (i.e., PV1, PV2, and PV3) with 16.5-12mm, 12-10mm and 10-4.75mm, respectively. In each group, cement was replaced from 0 to 30%, which was about twenty-one mixes, including conventional mixes prepared with a constant w/c ratio as 0.35 and superplasticizer at 1%. Samples were tested for compressive strength and hydraulic properties like porosity and permeability. Permeability was tested against the constant head method and variable head method. The results show that the hydraulic properties of pervious concrete enhanced with the usage of larger-sized aggregates. Fly ash effects adversely on the percolation capacity of pervious concrete.