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- W2990756211 abstract "Chloride ion penetration can cause corrosion of steel embedded in concrete in chloride-laden environment. Investigating the model of chloride diffusion is of vital importance to durability assessment and residual service life prediction of concrete structures. In this paper, firstly, a calculation method of instantaneous chloride diffusion coefficient (Dins) is established based on the apparent chloride diffusion coefficient (Da). Then, the existing experimental data in the literature are used for studying the influence of the coupled time and concrete stress effects on Dins, and the theoretical model of Dins is established. Finally, based on the established model of Dins, a prediction model of chloride concentration is proposed and the model is validated by two sets of experimental data. By comparative study with experimental data, the results show that the calculation method of Dins is reasonable and feasible, and Dins is smaller than Da at the same exposure time. Generally, the relative error between Dins and Da increases with the exposure time under the same tensile or compressive stress level, while at the same exposure time, it first increases and then decreases with increasing concrete tensile stress level, whereas it decreases with increasing concrete compressive stress level. It is found that Dins has strong time and stress dependence. The computed results of the proposed chloride ion concentration model agree well with the experimental data." @default.
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- W2990756211 date "2020-03-01" @default.
- W2990756211 modified "2023-10-18" @default.
- W2990756211 title "Influence of the coupled time and concrete stress effects on instantaneous chloride diffusion coefficient" @default.
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- W2990756211 doi "https://doi.org/10.1016/j.conbuildmat.2019.117645" @default.
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