Relationship between pore structure and chloride diffusion in cementitious materials

被引：45

作者：

Sakai, Yuya ^{[1
]}

机构：

[1] Univ Tokyo, Inst Ind Sci, Meguro Ku, 4-6-1 Komaba, Tokyo 1538505, Japan

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 229卷

关键词：

Cementitious material; Pore structure; Chloride ion; Chloride diffusion; Admixture material; CONCRETE; PERMEABILITY; COEFFICIENTS; PENETRATION; HYDRATION; MORTARS; INGRESS;

D O I：

10.1016/j.conbuildmat.2019.116868

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

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.

引用

页数：7

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