Abstract
This study is aimed to create a model for predicting the chloride ions migration process of concrete due to the compound interaction of salt damage and carbonation through an investigation into the immobilization of chloride ions in cement hydrates and the release of them when degradation of cement hydrates occurs due to carbonation. The available capacity of cement hydrates to immobilize chloride ions and the release of chloride ions accompanying with the carbonation of cement hydrates were determined by artificially synthesized cement hydrates which were immersed in artificial pore solution of concrete. Based on the above experiments, a model for characterizing the process of immobilization and release of chloride ions was established and its validity was verified by comparing calculated data with the data from the tests with cement paste and cement mortar specimens.
