Abstract
This paper has been conducted to develop a model to estimate ion diffusion coefficients in cementitious materials. The model is considered with temperature, humidity, hydration as a change of porosity, mixture proportions, kind of target ions, an electrochemical theory and so on. From the comparison of the estimated values and experimental values from immersing tests, exposure tests and diffusion cell tests, it was concluded that the diffusion coefficient from the developed model are equivalent to those from experiments. And it was found that the effect on the diffusion coefficients is larger in order of the effect of time dependence by hydration, water saturation, and temperature.
