- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
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- Chinese Science Citation Database
| Citation: | FENG Bo, LIU Qing, QIAN Yongjiu. Durability Analysis of High-Performance Concrete Under Chloride Salt Erosion and Freeze-Thaw Cycles[J]. Journal of Southwest Jiaotong University, 2023, 58(5): 1083-1089. doi: 10.3969/j.issn.0258-2724.20220035
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In order to study the durability of high-performance concrete (HPC) bridges in the marine environment, based on the rapid indoor freeze-thaw test of concrete, the durability of HPC under the coupled action of chloride salt erosion and freeze-thaw cycles was tested, and the mass loss rate and relative dynamic elastic modulus of concrete under different water-binder ratios, fly ash contents, and air contents were analyzed. According to the test analysis results, a quality prediction attenuation model of HPC under the coupled action of chloride salt erosion and freeze-thaw cycles was established. The results show that the water-binder ratio has a great influence on the salt-freezing resistance of HPC. The salt-freezing resistance of concrete decreases with the increase in the water-binder ratio, and it is suggested that the water-binder ratio should not be greater than 0.45; the addition of fly ash will reduce the salt-freezing resistance of concrete, and the salt-freezing resistance can hardly meet the requirements when the fly ash content is high. Therefore, the fly ash content should not be higher than 30%; as air content increases, the salt-freezing resistance of concrete first increases and then decreases. The air content of concrete considering the salt-freezing resistance requirements is recommended to be selected within the range of 4.5%–5.5%.
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