Pervious Concrete as a Stormwater Management Interface: Mechanical, Hydraulic, and Adsorptive-Filtration Behavior

This study investigates the effectiveness of pervious concrete (PC) in stormwater management and water purification, focusing on how the incorporation of fibers and supplementary waste materials influences the mechanical, hydraulic, and environmental performance of the concrete. The addition of fibers improves the hydraulic properties, mechanical strength, and structural integrity of PC, while the use of materials such as fly ash, silica fume, industrial byproducts, recycled demolition aggregates, and agricultural residues further enhances the filtration capabilities and environmental benefits. These modifications enable PC pavement to effectively filter rainfall-runoff by capturing contaminants including total suspended solids (TSS), turbidity, and organic matter. Moreover, PC demonstrates significant removal of metals such as lead (Pb), cadmium (Cd), copper (Cu), nickel (Ni), and zinc (Zn), with efficiencies ranging from 30% to 90% depending on the metal type and mix composition. PC also contributes to reductions in biochemical oxygen demand (BOD5) and chemical oxygen demand (COD). Thereby demonstrating the dual function of pervious concrete as a structurally robust pavement material and an environmentally beneficial stormwater treatment, while also contributing to solid waste reduction through the reuse of supplementary materials.