Coupled model on the variation of diffusion coefficient and surface chloride concentration in reinforced concrete structures over time

Reichert, Thiago Alessi; Balestra, Carlos Eduardo Tino; Medeiros-Junior, Ronaldo Alves de

doi:10.1016/j.conbuildmat.2023.134715

Cited by 1 publication

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“…Recently, several researchers have conducted extensive studies and attempted to reveal the diffusion process of chloride within concrete using laboratory characterization and numerical simulation [15][16][17][18]. Wu et al [19] presented a study on the durability testing of a concrete facility located within the North Bay Port region and in service for 200 months.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on Chloride Transport in Unsaturated Concrete: Highlighting Temperature, Humidity, and Mineral Admixtures

Du,

Jin,

et al. 2024

Materials

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Chloride transport within concrete is critical for the durability of reinforced concrete structures; however, its diffusion under the coupling action of temperature and humidity has not been fully comprehended. Therefore, in this work, the coupling effects of temperature, relative humidity, and mineral admixtures on chloride transport in concrete were investigated through experimental and numerical simulation work. The results show that the chloride diffusion coefficient decreases with the decreased temperature and growth of relative humidity; however, the chloride concentration on the concrete surface is increased with the growth of temperature and relative humidity. Moreover, compounding about 15% fly ash (FA) and 30% granulated ground blast furnace slag (GGBS) to replace the cement is the most beneficial for improving the antichloride capacity of concrete, considering also the strength. In addition, the numerical simulation considering the coupled effect of temperature and relative humidity of chloride transport in concrete has good agreement with that of experimental results.

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