Mechanical and Hydrological Properties of Pervious concrete made with blended mineral admixtures

Abstract

The purpose of this experimental research work was to examine porosity, permeability, compressive strength, split tensile and flexural strength of cement based blends of pervious concrete. Seven different mixtures of pervious concrete were prepared with two different aggregate fractions (passing 9.5mm retained on 6.3mm and passing 6.3mm retained on 4.75mm) in the ratio 60:40. The obtained cement blends (binary and ternary blends of mineral admixture) of pervious concrete exhibit sufficient permeability in the realm 7.7-13.3 mm/s for draining storm water with respect to typical application of pervious concrete for low volume roads. Ternary blends (PFS & PLS) demonstrated higher compressive, split tensile and flexural strength than binary (PF & PL) and control mixtures with acceptable porosity and permeability at all curing periods. The Ternary blended pervious concrete (PLM) could achieve 30% increased compressive strength and permeability of 7.7 mm/s at 90 days curing. The result thus obtained encourages the use of blended mineral admixtures in pervious concrete.