Abstract：Reinforced concrete structures inevitably develop cracks during the construction stage. In acorrosive environment,corrosion agents penetrate the concrete through the existing cracks, leading to the
corrosion of the steel reinforcement within the concrete. This significantly impacts the reliability and durability of the structure, which requires a solutions to resolve the problem. This study primarily investigated the permeability of chloride ions in damaged concrete in a corrosive environment.The degradation mechanisms of concrete structures immersed in a corrosive environment was analyzed. The corrosion patterns of steel reinforcement were simulated and tracked through experiments, and the corrosion mechanisms of the steel reinforcement were analyzed.Furthermore, the cracking behavior induced by corroded steel reinforcement in concrete structures was examined, and the degradation patterns of corrosion was studied.Predictive models was established. The results indicate that when initial cracks exceeded 80 μm, the permeability of chloride ions within the concrete significantly increased, which rendering the protective layer ineffective. Through this research , reasonable and timely maintenance guidance can be provided for the operation of reinforced concrete structures with existing cracks in corrosive environments. This helps ef-fectively prevent secondary structural damage such as surface expansion, spalling,exposure of reinforcement , and rust stains caused by further corrosion of the steel reinforcement , ultimately extending the service life of reinforced concrete structures.
2024, Vol. 37 
