Optimizing Pervious Concrete Mix Design for Sustainable Urban Pavements

Shubham Ahirwar; Harsh Rathore

Abstract

This research explores the comprehensive evaluation of pervious concrete, with a focus on sustainability and performance enhancement. It investigates various factors influencing pervious concrete properties, including cement content, aggregate sizes, water-cement ratio (w/c), and the incorporation of chemical admixtures. The study establishes that an optimal cement content range of 350 kg/m3 to 375 kg/m3 is most effective in achieving the desired balance between workability and essential properties. The research also assesses the impact of two coarse aggregate sizes (10 mm - 4.75 mm and 20 mm - 10 mm), demonstrating their limited influence on void ratio, permeability, and density but substantial effects on compressive strength. Additionally, it highlights the significance of a 0.4 w/c ratio for ensuring cohesive and workable mixtures. Chemical admixtures and superplasticizers are evaluated, with a 0.9% dosage proving effective in enhancing workability and cohesiveness. The findings contribute to the advancement of pervious concrete mix designs, taking into account sustainability measures and accommodating varying aggregate sizes. These insights hold promise for enhancing the sustainability and performance of urban pavements while offering valuable directions for future research in the field.