Abstract In marine environments, the concrete deterioration due to chloride ion attack is influenced by a number of factors. A chloride diffusion model considering multiple factors was proposed and validated through experiments. Meanwhile, a comprehensive model was established based on the Monte-Carlo method to predict the service life of concrete subjected to chloride corrosion. This model takes into account factors including time of exposure, chloride ion binding capacity, temperature and relative humidity. The results indicated that: the durability lifespan decreases with increasing time decay coefficient, ambient temperature, and relative humidity. As the temperature rises from 20 to 30 °C, the service life reduces by 31.6 %; when relative humidity increases from 70 to 90 %, the service life decreases by 50.6 %; and when the time decay coefficient rises from 0.2 to 0.4, lifespan diminishes by 54.2 %. Conversely, the increase in chloride binding capacity exerts a favorable effect on durability life. In addition, sensitivity analyses were conducted and the factors influencing the durability life of concrete structures, ranked from highest to lowest impact, is as follows: protective layer thickness, diffusion coefficient, surface chloride concentration and critical chloride concentration. The results of the study can provide a reference for predicting the durability life of concrete structures.
Liu et al. (Thu,) studied this question.