A MODEL FOR PREDICTING THE DETERIORATION OF CONCRETE DUE TO THE COMPOUND INFLUENCE OF SALT DAMAGE AND CARBONATION

摘要

The aim of this study is to set up a model for predicting the process of chloride ion migration in concrete under the compound influence of salt damage and carbonation. The basis of the model is an investigation into the immobilization of chloride ions in cement hydrates and their release when carbonation causes degradation of the hydrates. The available potential for hydrates to immobilize chloride ions and the carbonation-induced release of chloride ions is determined using artificially synthesized cement hydrates, which are immersed in an artificial pore solution. Based on these above experiments, a model characterizing the process of immobilization and release of chloride ions is established and its validity is verified by comparing calculated data with data from tests on cement paste and mortar specimens.