Bibliographic Details
| Title: |
Effect of Carbonation and Drying-Wetting Cycles on Chloride Diffusion Behavior of Coral Aggregate Seawater Concrete. |
| Authors: |
Da, Bo, Li, Yipeng, Yu, Hongfa, Ma, Haiyan, Chen, Haoyu, Dou, Xuemei, Wu, Zhangyu |
| Source: |
Journal of Ocean University of China; Feb2022, Vol. 21 Issue 1, p113-123, 11p |
| Abstract: |
Based on seawater immersion, drying-wetting cycles, carbonation and drying-wetting cycles for coral aggregate sea-water concrete (CASC) with different strength grades, the effect of carbonation and drying-wetting cycles on chloride diffusion behavior of CASC is studied. The results show that the free surface chloride concentration (Cs), free chloride diffusion coefficient (Df) and time-dependent index (m) of CASC in the drying-wetting cycles is obviously higher than that in seawater immersion. The Df and m of CASC of carbonation and drying-wetting cycles is higher than that in the drying-wetting cycles. Carbonation increases the Df and m of CASC, which is against CASC to resist chloride corrosion. The corrosion possibility of CASC structures in different exposed areas is as follows: splash zone (carbonation and drying-wetting cycles)>tidal zone (drying-wetting cycles) >underwater zone (seawater immersion). Besides, the chloride diffusion rate of C65-CASC is 17.8%–63.4% higher than that of C65-ordinary aggregate concrete (OAC) in seawater immersion (underwater zone). Therefore, anti-corrosion measures should be adopted to improve the service life of CASC structure in the oceanic environment. [ABSTRACT FROM AUTHOR] |
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| Database: |
Complementary Index |
