Chloride-induced corrosion modelling of cracked reinforced SHCC

被引：25
|
作者：
Paul, Suvash C. [1 ,2 ]
van Zijl, Gideon P. A. G. [2 ]
机构：
[1] Nanyang Technol Univ, Singapore Ctr Printing 3D, Sch Mech & Aerosp Engn, Singapore, Singapore
[2] Univ Stellenbosch, Dept Civil Engn, ZA-7600 Stellenbosch, South Africa
来源：
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING | 2016年 / 16卷 / 04期
关键词：
Chloride; Cracks; Corrosion modelling; Pitting depth; Strain hardening cement-based composite (SHCC); CONTAMINATED CONCRETE; STEEL; WIDTH;
D O I：
10.1016/j.acme.2016.04.016
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Corrosion of steel bars in concrete is usually a slow electrochemical process which may need a long time before damage becomes visible in the reinforced concrete (RC). However, cracks provide quick access to chloride, oxygen and water into concrete and accelerate the corrosion process. Corrosion modelling is essential for structural design for a particular life span, or to inform decisions on repair of RC structures to reach or extend their service life. This paper reports experimental research results of accelerated chloride exposure of cracked reinforced strain hardening cement-based composite (R/SHCC) specimens for a period of one year. Based on these novel results, a corrosion model is proposed which incorporates crack width, crack spacing, free chloride content and cover depth. The model is shown to capture the corrosion results of cracked R/SHCC reported in this paper. (C) 2016 Politechnika Wroclawska. Published by Elsevier Sp. z o.o. All rights reserved.
引用
收藏
页码：734 / 742
页数：9
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