Abstract
The purpose of this study is to develop the analytical method which can evaluate the change in physico-chemical property of mortar immersed in sulfuric acid solution. In this analytical approach, influences of sulfate acid attack were considered by diffusivity change of sulfate ions and physical change caused by chemical reaction of cement hydrate with sulfate ions. In the analysis, deposition condition of ettringite and gypsum was given by pH value and porosity which were calculated by the change in cement hydrate based on the experimental results. Finally, the validity of the analysis was discussed through parametric analyses in which the porosity value was varied.
