Mechanical properties and stress-strain relationship of recycled stone masonry aggregate concrete

Abstract

This study investigates the mechanical properties and stress-strain relationship of recycled stone masonry aggregate (RSMA) concrete with varying replacement ratios. Using a three-graded RSMA (5–60 mm), the research was further validated through its application in the reconstruction project of the Kada Reservoir dam. The results reveal that as the replacement ratio of RSMA increases, there is a corresponding decrease in compressive strength, splitting tensile strength and elastic modulus. The ascending section of the dimensionless stress-strain curve of RSMA concrete exhibits a pattern comparable to that of natural aggregate concrete. As the aggregate replacement ratio increases, the descending portion of the stress-strain curve for RSMA concrete becomes steeper. To model the behavior of three-graded RSMA concrete, the constitutive equation for two-graded recycled aggregate concrete was applied. This study provides a critical foundation for the regeneration and utilization of slurry masonry dams, offering both theoretical insights and practical guidance for sustainable dam reconstruction projects.