Permeability and mechanical properties of pervious concrete curb with different aggregate sizes

Abstract

Pervious concrete is an environmentally friendly material that can be a feasible option in solving urban drainage problems and mitigating climate change. This research aims to evaluate the mechanical and hydraulics properties of pervious concrete with different aggregate sizes and propose the acceptable aggregate size for road curb. Pervious concrete mixes are prepared with single-sized aggregates (4.75, 8, 12.5 and 16 mm) with constant aggregate cement and water-cement ratios. Furthermore, a series of tests were conducted in this study, such as compressive strength, porosity, and permeability. The experimental result showed that the size of coarse aggregate affects the strength and permeability of the specimens. The permeability and porosity decrease as the aggregate size increases. The smaller aggregate size is beneficial to increase the 28 days compressive strength of pervious concrete. Linear regression relationships were developed to establish relationships between porosity and compressive strength and porosity and permeability. The obtained result showed that the aggregate size of 8 mm performed better than the others in all assessments and could be applied on pervious concrete curb.