Automatic air-cooling system for early-age crack control in concrete

作者:Li, Xiongyan*; Geng, Yan; Xue, Suduo; Li, Jinguang; Song, Yanjie; Kang, Guangbo
来源:Proceedings of the Institution of Civil Engineers-Civil Engineering, 2019, 172(5): 58-64.
DOI:10.1680/jcien.18.00036

摘要

Early-age heat-induced cracking is a potentially fatal problem for critical concrete structures such as liquefied natural gas storage tanks. This paper reports on a novel automatic air-cooling system designed to solve the problem. The system was designed following a series of air-cooling experiments in China on concrete walls during the first 72 h after casting. An air velocity of approximately 12 m/s appears to provide effective cracking control for ambient air temperatures up to 30 degrees C, while the optimal cooling segment length was found to be approximately 14 m. The paper aims to provide a reference for the application of air cooling for any large-scale concrete structures at risk of early-age cracking.