Estimation of Diffusion Coefficient of Chloride Ions for Concrete Durability Design

In this study, a new method is developed to estimate chloride diffusion coefficient of concrete specimen by using the decrease of chloride ion concentration in the solution containing chloride ions. First, the analytical solution is developed from Fick's second law using initial and boundary conditions. And a new experimental method is introduced to get the parameters to calculate analytical solution. In this experiment, any equipment is not required to accelerate chloride ions penetration. Therefore, the diffusion coefficient estimated by this method is more accurate than the other methods that use special equipments to accelerate chloride ion penetration. And this approach can make it possible to get the diffusion coefficient of chloride in concrete specimen within 3 similar to 4 days.