Stress-strain characteristics and energy absorption analysis of Construction and demolition waste recycled aggregate concrete in compression

Abstract

The stress strain characteristics and mechanical properties of construction and demolition aggregate concrete at two different w/c ratios – 0.4 and 0.5 are presented in this study. The mechanical and stress strain characteristics of recycled aggregate concrete are compared to the properties and Stress strain characteristics of the conventional aggregate concrete. The mechanical properties include the cube and cylindrical compressive strength, Modulus of elasticity, flexural strength, split tensile strength and hardened density. Under stress strain characteristics, strain at peak stress and the energy absorbed under compression is included. The study aimed to correlate and compare the behaviour of recycled aggregate concrete and Conventional aggregate concrete having comparable strength. Finally, the experimental stress strain characteristics of the Recycled aggregate concrete is analysed for its compatibility of the assumed stress strain behaviour of concrete in IS 456. According to the findings, recycled aggregate concrete has similar stress-strain characteristics to conventional aggregate concrete of comparable strength, and existing stress block parameters can be suitably used for the recycled aggregate concrete.