Study on chloride diffusion parameters of concrete based on the field investigation of harbor engineering in South China

摘要

Based on the durability investigation on marine concrete structures in South China, the surface chloride concentration and the critical chloride concentration inducing reinforcement corrosion were researched. The surface concentration under the marine environment in South China was analyzed by solid core tests on the harbors with different service ages, and the fluctuation range of surface concentration ranges from 0.2% to 1.1%. Through electrochemical testing and appearance investigation, the value of the critical chloride concentration in concrete components is studied, which is in the range of 0.0518% to 0.0824% by mass of concrete.