Experimental Study of Pervious Concrete Using Recycled Coarse Aggregate

The project aims at study the effect of water-cement ratio and the replacement ratio of recycled coarse aggregate (RCA) on the physical and mechanical properties of pervious concrete and the correlation between these properties. The research methodology is to replace natural coarse aggregate (NCA) with RCA at four replacement levels of 10, 20, 30 and 40 % and adjust water-cement ratios of 0.25 and 0.30. The total void content, effective void content, cubic compressive strength, splitting tensile strength, water permeability, and abrasion resistance of pervious concrete were tested. The results show that with the increasing of w/c ratio or replacement ratio of RCA, void content and permeability coefficient of pervious concrete increase in a certain degree, but cubic compressive strength, splitting tensile strength and abrasion resistance decrease. Data analysis shows that there are good correlations between relevant performance indicators.