Mathematical Model to Predict the Compressive Strength of Pervious Concrete

Abstract

This study examined the impact of aggregate size, aggregate-to-cement ratio and compaction energy on the compressive strength of pervious concrete and proposed a mathematical model to predict the compressive strength. Two sets of aggregate sizes (5-12 mm, 12-18 mm), five sets of aggregate-to-cement ratio (3.0, 3.5, 4.0, 4.5 and 5.0) and seven sets of compaction energy (0, 15, 30, 45, 60, 75 and 90 blows) were deployed in this study. Pervious concrete was cast with a total of 70 different mix designs (210 cubes) and tested for compressive strength. From the analysis of test data, mathematical connections between compressive strength and aggregate size, aggregate-to-cement ratio, and compaction energy were developed. Compressive strength was accurately represented by the established models in terms of aggregate size, A/C ratio, and compaction energy. These models would be helpful to practitioners and researchers when setting pervious concrete mix design parameters for a range of pervious concrete applications.