Relationship between pore structure and chloride diffusion in cementitious materials

摘要

In this study, literature on pore structure examined by mercury intrusion porosimetry and chloride diffusion was collected and analysed to investigate the correlation between the chloride diffusion and pore structure indicators such as total pore volume, median pore diameter, threshold pore diameter and critical pore diameter in cementitious materials. Good correlation between total porosity and chloride diffusion was found when the samples had no admixture materials and diffusion test was conducted without acceleration. There was no correlation between pore diameter and chloride diffusion coefficient. The diffusivity of cement paste was reduced by adding admixture materials compared to that without admixture materials even if the total porosity is the same. On the other hand, the diffusivity of concrete was not reduced by adding admixture materials. (C) 2019 Elsevier Ltd. All rights reserved.