Effect of temperature rise inhibitor on early-age behavior and cracking resistance of high strength concrete under uniaxial restrained condition

Abstract

Temperature rise inhibitor (TRI) is used to modify the cement hydration and reduce the heat release of high strength concrete (HSC). Many investigations on the mechanical properties, temperature process, and autogenous shrinkage of cement-based materials with TRI have been conducted. However, the evaluation of the early-age behavior and cracking resistance of HSC with TRI under uniaxial restrained condition considering the effects of temperature, shrinkage, restrained stress, and tensile creep simultaneously was rarely conducted. Temperature stress test machine, which could measure these factors simultaneously, was used to investigate the effect of TRI contents on the early-age behavior and cracking resistance of HSC in this research. The peak temperature, temperature rising rate, autogenous shrinkage, and tensile creep decreased with increasing TRI contents. The addition of TRI improved the early-age cracking resistance of HSC. A modified stress-strain failure criterion and a prediction model for autogenous shrinkage of HSC with TRI were proposed.