Mechanisms of Early Cracking in Concrete Structures in Cold Regions and On-Site Construction Control Techniques

HongBo Liu

doi:10.63313/AERpc.9108

Authors

HongBo Liu Xinyu Tengyuan Planning and Design Co., Ltd. Xizang Branch, Lhasa, Xizang, 850011, China Author

DOI:

https://doi.org/10.63313/AERpc.9108

Keywords:

Cold Regions, Concrete Cracking, Temperature Control, Dynamic Crack Monitoring, Construction Technology

Abstract

Early-age cracking in concrete structures during winter construction has become increasingly prominent, seriously affecting structural durability and engineering safety. This study focuses on concrete structures in cold regions and systematically investigates the mechanisms of early-age cracking and on-site construction control techniques through theoretical analysis, construction technology research, and engineering applications. The research methodology includes the design of casting temperature and thermal insulation construction techniques, the establishment of a temperature control index system, dynamic evaluation of crack risk coefficients, and validation through projects in high-cold regions. Results indicate that concrete cracking in cold areas primarily results from the combined effects of thermal stress, shrinkage deformation, frost heave, and construction factors. Key control indicators include casting temperature, internal peak temperature, internal-external temperature differential, and cooling rate. The integrated application of heat storage insulation, electric heating, moisture-maintaining curing, and intelligent temperature control effectively reduces the number of cracks. By combining temperature monitoring with crack risk coefficients, dynamic closed-loop control during construction can significantly reduce early-age cracking. The proposed temperature control index system and dynamic crack management method systematically reveal the laws governing early-age cracking in concrete in cold regions and provide practical technical guidance for concrete construction in high-cold areas, offering important theoretical and engineering significance.

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