Concrete life prediction model based on freeze-thaw damage theory and its application

Abstract

For hydraulic concrete structure in cold and severe cold areas in northern China, its frost resistance directly restricts the life and safe and stable operation of the project. In this paper. Based on the freeze-thaw damage theory, this paper optimizes and improves the Weibull distribution model, and uses the 1:1:4 standard frost-resistant specimen of hydraulic concrete as the physical model to obtain a freeze-thaw damage model that is more in line with the standard specimens of the rapid freeze-thaw experiment. Based on this model, a concrete life prediction method is proposed. In order to solve the problem that the initial damage of coring concrete is not clear, an iterative approximation method is proposed. The life prediction method proposed was verified through actual engineering cases. The results show that the model can better describe the process of concrete freeze-thaw damage and destruction, and the life prediction results are more reliable.