Stress-strain curves of rubberized concrete after high temperature

In this study, the stress-strain curves of concrete containing rubber by partial replacement of fine aggregate under axial compression after high temperature have been researched. The percentage of rubber content is 5%, 10% and 15% by volume. 6 plain concretes (PC) and 18 rubberized concretes (RC) are heated at 100 oC, 200 oC, 400 oC, 600 oC and 800 oC.The obtained results indicate that the compressive strength and modulus of elasticity of rubber concrete decrease following the increasing temperature. Contrarily, the increase of the mass loss ratio, peak stress and specific toughness of concrete containing rubber is affected by temperature and the failure model of concretes demonstrate the more rubber, the greater the ductility. Cracks and color changes on the surface of the specimen as the temperature increases. The proposed stress-strain curves model is to predict the stress-strain relationships of rubber concretes after elevated temperature, which demonstrated a reasonable result.