Effects of Particle Sizes and Cement Pastes on Mechanical Properties of Pervious Concrete

Abstract

The purpose of this study is to determine the effects of aggregate size as well as the paste volume on unit weight, connected porosity, water permeability coefficient, compressive strength, and flexural strength of pervious concrete. Four aggregate sizes and four filled percentages of voids by cement pastes were selected as variables. Test results show that the unit weight, compressive strength, and flexural strength of pervious concrete increased with an increase of the filled percentage of voids by cement pastes, but decreased the connected porosity and water permeability coefficient. Pervious concrete with aggregate size of 0.24 – 0.4cm and 90% filled percentage of voids by cement pastes had the highest compressive strength of 25 MPa. Meanwhile, the water permeability of this mixture was higher than 0.01 cm/s which can be classified as the pervious concrete according to the Japan Road Association (JRA).