The effect of moisture transport on chloride penetration in concrete

被引：53

作者：

Homan, Lydia ^{[1
]}

Ababneh, Ayman Nureddin ^{[2
]}

Xi, Yunping ^{[3
]}

机构：

[1] CommercialTribe, 1331 17th St,Suite 400, Denver, CO 80202 USA

[2] Jordan Univ Sci & Technol, Dept Civil Engn, POB 3030, Irbid, Jordan

[3] Univ Colorado, Dept Civil Environm & Architectural Engn, Campus Box 428, Boulder, CO 80309 USA

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2016年 / 125卷

基金：

美国国家科学基金会;

关键词：

Chloride; Moisture; Transport process; Partially saturated concrete; Durability; CEMENTITIOUS MATERIALS; NONSATURATED CONCRETE; SATURATED CONCRETE; PORE PRESSURE; DIFFUSION; TEMPERATURE;

D O I：

10.1016/j.conbuildmat.2016.08.124

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents results of an experimental investigation on the effect of moisture transport on chloride penetration in partially saturated concrete. The paper includes the development of an experimental setup, analysis of experimental data, and formulation of the governing equations to characterize the moisture-chloride interaction in non-saturated concrete. The experimental setup consisted of two sets of fully and partially saturated concrete specimens that were exposed to chloride solutions. Humidity sensors were embedded in the concrete specimens to measure the internal relative humidity and the variation of humidity profiles over time. The governing equation that describes the chloride transport in saturated concrete was modified to account for the chloride movement induced by the moisture transport. The comparison of the chloride profiles obtained from the partially and fully saturated concrete specimens confirmed the coupling effect between the moisture transport and chloride penetration in concrete. The measured chloride and humidity profiles were analyzed to determine the coupling parameter in the governing equation. The analysis of the experimental data indicated that the coupling term in the governing equation is concentration dependent which means that the governing equation is nonlinear. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：1189 / 1195

页数：7

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