Abstract: Recycled coarse aggregate was produced from crushed and sieved waste concrete blocks, and its physical properties were tested. The recycled aggregate was blended with natural aggregate at different ratios, and pervious concrete specimens were prepared using P·O 42.5 cement, polycarboxylic high-performance water-reducing admixture, and a mineral enhancer. By investigating the effect of different mixing recycled coarse aggregate replacement ratios on the mechanical and permeability properties of pervious concrete, it was found that as the replacement ratio increased, the mechanical properties showed a gradual downward trend, while the effective porosity and permeability coefficient show an upward trend. Regression analysis indicates that the effective porosity and the compressive strength, as well as the permeability coefficient and compressive strength, exhibit a quadratic relationship, while the effective porosity and permeability coefficient are linearly correlated.

Key words: permeable concrete, recycled aggregates, permeability coefficient, compressive strength, effective porosity, correlation analysis