Chlorine Ion Content Distribution of Concrete Surfaces in a Natural Environment

Based on Fick's Law of Diffusion, this research created a correlation model between the chlorine ion content in concrete surfaces and the elevation and distance away from the ocean in a natural environment. The real-time monitoring data of concrete chloride erosion in a natural environment were used to validate the rationality of the proposed correlation model. In addition, the variations of the chloride diffusion coefficient in concrete and the maximum chlorine ion content in a concrete surface along an elevation were investigated. The results showed that the chlorine ion content in concrete in a natural environment significantly changed and correlated with the elevation and distance from the ocean. The variation of chloride ion content in concrete surfaces along an elevation can be characterized by an S curve, and the variation of chloride diffusion coefficient of concrete along an elevation had a Gaussian distribution.