Abstract
The purpose of this study is to establish and propose a numerical analysis method for predicting the long-term Ca leaching from concrete. In this method, the Ca leaching ratio can be estimated using the model about ion migration and Ca leaching in concrete. Nernst-Plank equation, Debye-Huckel theory and electro-neutrality condition are used for modeling ion migration in concrete. Also, Buil's model is used for modeling Ca leaching from cement paste to pore solution. In order to verify this method, the prediction results are compared to the survey results of an existing structure used for 100 years. As a result, the numerical analysis method for predicting Ca leaching from concrete is established. Moreover, the Ca leaching from concrete for 1000 years is predicted using this method.
