Modelling of convection, diffusion and binding of chlorides in concrete during wetting-drying cycles
ORCID
- Long-yuan Li: 0000-0002-5982-0965
Document Type
Article
Abstract
Moisture convection in concrete is an important factor affecting the chloride diffusion in concrete. This paper presents a comprehensive study on the transport of moisture, carbon dioxide and chloride ions in concrete when subjected to wetting and drying cycles. A numerical model considering not only the transport of individual components but also the interaction between them is developed. The latter includes the concrete carbonation, chloride binding, the effect of concrete carbonation on chloride binding capacity, and the time-varying boundary conditions of carbon dioxide and chloride caused due to wetting and/or drying. The results obtained from the study demonstrate that when moisture convection and concrete carbonation in the convection zone near the exposed surface are involved the chloride indeed exhibits an increase in a thin layer next to exposed surface before it decreases with the distance as observed in many experiments.
DOI Link
Publication Date
2022-01-01
Publication Title
Marine Structures
Volume
84
ISSN
0951-8339
Acceptance Date
2022-05-05
Deposit Date
2022-10-05
Embargo Period
2023-05-10
Funding
The authors would like to acknowledge the financial support received from the National Natural Science Foundation of China (Grant Nos. 51978406, 51520105012, 52078300, 52078301).
Keywords
Modelling, Chloride, Diffusion, Carbonation, Wetting and drying cycles, Unsaturated concrete
Recommended Citation
Li, L., Li, D., Li, P., & Wang, Y. (2022) 'Modelling of convection, diffusion and binding of chlorides in concrete during wetting-drying cycles', Marine Structures, 84. Available at: 10.1016/j.marstruc.2022.103240
