Evolution of thermal parameters of wet‐screened dam concrete after different freeze–thaw deterioration

Abstract

Even with specialized equipment, it is difficult to measure the thermal parameters of dam concrete during freeze-thaw testing. In addition, numerical calculations usually assume that freeze-thaw cycling does not change the thermal parameters of the aggregate and mortar of dam concrete, which makes it difficult to accurately determine how these parameters evolve during freeze-thaw deterioration. To address this challenge, we propose herein a new method to determine the thermal parameters of wet-screened dam concrete during freeze-thaw deterioration. This method involves freeze-thaw testing, temperature perturbation, numerical calculation, and optimization inversion. First, 200 rapid freeze-thaw tests and 5 temperature perturbation tests of 5 concrete