Electrochemical Numerical Simulation of Engineered Cementitious Composite with Crack Under Chloride Ion Environment

ZHENG Jianfeng

doi:10.3724/j.gyjzG23102404

Volume 55 Issue 6

Jun. 2025

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ZHENG Jianfeng. Electrochemical Numerical Simulation of Engineered Cementitious Composite with Crack Under Chloride Ion Environment[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(6): 260-267. doi: 10.3724/j.gyjzG23102404

Citation:

ZHENG Jianfeng. Electrochemical Numerical Simulation of Engineered Cementitious Composite with Crack Under Chloride Ion Environment[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(6): 260-267. doi: 10.3724/j.gyjzG23102404

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Electrochemical Numerical Simulation of Engineered Cementitious Composite with Crack Under Chloride Ion Environment

doi: 10.3724/j.gyjzG23102404

ZHENG Jianfeng^1,2,3

1. Transportation and Construction bureau of Pingtan Comprehensive Experimental Zone, Pingtan 350400 China;
2. College of Civil Engineering, Fuzhou University, Fuzhou 350108, China;
3. Pingtan Comprehensive Experimental Zone Innovation Research Institute, Pingtan 350400, China

Received Date: 2023-10-24

Abstract

Abstract

In order to study the chloride ion erosion of Engineered Cementitious Composite（ECC） with cracks in the dry and wet cycling environment， a COMSOL one-dimensional electrochemical numerical model was established based on the empirical formula of chloride ion diffusion coefficient under the damaged matrix and the measured chloride ion diffusion coefficient with crack width as the variable， and the difference in chloride ion concentration between the crack area and the lower area wrapped by the intact concrete protective layer was also considered. The slope correction of anode Tafel is introduced， and the data sensitivity is analyzed by comparing the test data with the simulation results. The results show that the ECC simulation results of erosion under a single fracture fit well with the experimental data， and the larger the main fracture， the more accurate the fitting results. The closer the main crack is， the higher the chloride ion concentration is， and the closer the chloride ion boundary concentration is， the higher the corrosion rate is. The simulation error decreases with the increase of damage degree. The maximum error is 15% under 50% damage condition， while the minimum error is only 10% under 90% damage condition. ECC corrosion rate and crack width in the range of 50 μm to 200 μm crack width conform to the functional relationship of logistics function， and the correlation coefficient is 0.98.
- engineered cementitious composite（ECC）,
- chloride ion,
- crack width,
- numerical simulation,
- electrochemistry

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References(19)

References

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