STUDY ON THERMAL CRACKING RESISTANCE OF MEDIUM-SIZED CONCRETE

Volume Title: ICASGE2025

Paper ID : 1070-ICASGE

School of Architecture and Civil Engineering, Xihua University

This study focuses on the influence of temperature-suppressing admixtures on the hydration temperature and crack resistance of medium-sized concrete. Due to their specific size and loading requirements, medium-sized concrete structures, such as beams, slabs, and columns, face unique challenges in controlling temperature-induced cracks. To address this issue, various dosages of temperature-suppressing admixtures (0%, 0.05%, 0.1%, and 0.15%) were tested in concrete mixtures. The results indicate that with increasing admixture content, the maximum hydration temperature of the concrete gradually decreases, and the time to reach this peak temperature is delayed. This inhibitory effect on the hydration process helps to reduce the risk of concrete cracking. Additionally, the study found that the larger the concrete volume, the higher the maximum hydration temperature and the later the occurrence of the peak temperature. Based on the experimental data, a functional relationship between the maximum hydration temperature, concrete volume, and admixture content was established. This relationship can be used to predict the optimal admixture content needed to achieve the desired maximum hydration temperature and concrete volume in future applications. The findings of this study provide valuable insights for engineers and architects in selecting the appropriate admixture content for their concrete mixtures, thereby enhancing the durability and thermal stability of medium-sized concrete structures.

Temperature-suppressing admixtures; Medium-sized concrete; Hydration temperature; crack resistance; Model

Materials Properties and Testing (MAT)