Abstract
Chloride ion plays a critical role in terms of steel corrosion for reinforced concrete structures, which leads to structural degradation. To investigate the macro-cell corrosion and mechanical deterioration, an integrated chemo-electric numerical platform has been developed with spatial-averaged modelling of steel and concrete. The verification of macro-cell circuit in structural concrete induced by applied charge has been achieved, while the ionic behaviors under impressed charge evaluated by this platform remains unverified. This study numerically investigates the ionic behavior of chloride under both ponding and electrophoresis conditions with the integrated platform. Comparison between numerical simulation and available experimental data shows the capability of this platform on predicting the time-dependent profiles of chloride ion under external charge. The acceleration effect of an applied electric field is obtained through simulation, and a sensitivity analysis is performed on peak radius of capillary pores and constricitivity parameter for electrical interaction of the matrix. The results indicate that while the previous constrictivity model successfully reproduces chloride profiles for the ponding test, it should be modified to account for the effect of applied charge on ionic migration through micro-pores under electrophoresis conditions.
Keywords
chloride diffusion, electrophoresis, constrictivity, numerical analysis.
DOI
10.5703/1288284318128
Recommended Citation
Matsutani, Kai; Wang, Zhao; Takahashi, Yuya; and Ishida, Tetsuya, "Evaluation of Ionic Behaviours under Electric Field with Integrated Chemo-electric Numerical Platform" (2025). International Conference on Durability of Concrete Structures. 1.
https://docs.lib.purdue.edu/icdcs/2025/cms/1
Evaluation of Ionic Behaviours under Electric Field with Integrated Chemo-electric Numerical Platform
Chloride ion plays a critical role in terms of steel corrosion for reinforced concrete structures, which leads to structural degradation. To investigate the macro-cell corrosion and mechanical deterioration, an integrated chemo-electric numerical platform has been developed with spatial-averaged modelling of steel and concrete. The verification of macro-cell circuit in structural concrete induced by applied charge has been achieved, while the ionic behaviors under impressed charge evaluated by this platform remains unverified. This study numerically investigates the ionic behavior of chloride under both ponding and electrophoresis conditions with the integrated platform. Comparison between numerical simulation and available experimental data shows the capability of this platform on predicting the time-dependent profiles of chloride ion under external charge. The acceleration effect of an applied electric field is obtained through simulation, and a sensitivity analysis is performed on peak radius of capillary pores and constricitivity parameter for electrical interaction of the matrix. The results indicate that while the previous constrictivity model successfully reproduces chloride profiles for the ponding test, it should be modified to account for the effect of applied charge on ionic migration through micro-pores under electrophoresis conditions.
