Coupled Multiphase Numerical Analysis of the Effect of Drying-Wetting Cycles on Chloride Ion Distribution in Concrete

Abstract

Abstract: Due to corrosion of steel by chloride ions, the durability of reinforced concrete structure is influenced strongly by chloride ingress. In order to study the effect of environmental humidity on chloride ion distribution in concrete, a coupled multiphase model of chloride ions penetration was developed. The variation of chloride ion erosion process with environmental humidity was studied by numerical simulation. The numerical simulation results show that the change of environmental humidity not only drives moisture transfer within the concrete, but also has significant effect on the chloride ion distribution in concrete, particularly induces formation reactions of salt crystals inside the concrete pores, which is recognized to be a major factor of degradation of concrete. The numerical simulation results will provide important reference for the anticorrosion design of concrete structures.

Key words: concrete, drying-wetting cycle, chloride ions transport, coupled multiphase, numerical simulation

CLC Number:

TU528

LI Rongtao, TUAN Christopher Y.. Coupled Multiphase Numerical Analysis of the Effect of Drying-Wetting Cycles on Chloride Ion Distribution in Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(2): 480-484.

References

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