Hardened properties of pervious concrete using mixed aggregate blended with admixtures

Abstract

In the present study, a new combination of materials for making pervious concrete have been obtained based on compressive strength and permeability. The investigation is done for finding hardened properties and its main aim is to know the improvement in compressive strength and permeability by different combinations of materials. Also, different tests for void ratio, porosity and water absorption are conducted. The different sizes of aggregate used are 20mm, 12.5mm and 10mm with cement replacement with fly-ash 10%, 20%, 25% and 30% and with maximum cement content 450kg/m3, 500kg/m3 of 53 grade. It is observed that the strength and other properties are highly fluctuating. The maximum compressive strength obtained is 21.3MPa with 450kg/m3 cement content of aggregate combination 60-20-20 with 30% of fly ash. The maximum permeability obtained is 2.87 cm/sec with 450kg/m3 cement content of aggregate combination 20-40-40 with 20% fly-ash. The maximum water absorption obtained is 4.087% with500kg/m3of aggregate combination 50-20-30 with 30% fly-ash. The maximum void ratio obtained is 37.545% with 500kg/m3 cement content of aggregate combination 40-30-30 with 25%fly-ash. The maximum porosity obtained is 68.912% with 500kg/m3 cement content of aggregate combination 40-30-30 with 25% fly-ash.