LIU Chen-xia, CHEN Gai-xin, WANG Xiu-jun, KONG Xiang-zhi (State Key Laboratory of Simulation and Requlation of water lycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China)

Abstract: A kind of reactive aggregate from practical project was used to prepare concrete samples in this paper. Based on practical mix proportion of hydraulic project, concrete was prepared to investigate the effect of ASR on the concrete mechanical properties, including compression strength, splitting tensile strength, bending strength, and ultimate tensile strength. After cured in standard curing room for 28 days, all the concrete samples were moved to the curing room with a curing temperature of 60±1℃ and a relative humidity of 90%~95%. At several certain AAR expansion values, mechanical properties were tested. The results showed that the concrete mechanical properties decreased with the increase of damage amount resulting from AAR. The damage of concrete was characterized by relative dynamic modulus of elasticity, according to the relationship between concrete mechanical properties and damage amount, the prediction model about the damage degree of mechanical properties was established.

Key words: ASR, prediction model, damage amount

Published in: Journal of China Institute of Water Resources and Hydropower Research (Vol. 10 No. 2, 2012)