Performance of pervious recycled aggregate concrete with reduced cement content

Abstract

Pervious concrete is a tailored concrete to have very high water permeability. The presence of interconnected pores of different sizes and shapes allow the passage of water to flow through easily. Permeable concrete pavement was shown to have significant advantages in stormwater management over impervious pavements and minimizing the risk of flooding in urban environment. This paper reports the results of an experimental investigation into the development of pervious concrete with reduced Portland cement content and recycled concrete aggregate. The performance of pervious concrete was evaluated through strength development, density, void content and permeability. The use of recycled concrete aggregate was found to affect the compressive strength of pervious concrete without influencing the permeability. The relationships between strength and void content, and permeability and porosity are reported. Through the empirical relationship presented, pervious concrete mixes with either natural aggregate or recycled concrete aggregate to meet the strength and permeability requirements could be designed.