3D simulation of localized steel corrosion in chloride contaminated reinforced concrete

被引：77

作者：

Cao, Chong ^{[1
,2
]}

机构：

[1] McGill Univ, Dept Civil Engn & Appl Mech, Montreal, PQ H3A 0C3, Canada

[2] Hong Kong Univ Sci & Technol, Hong Kong, Hong Kong, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2014年 / 72卷

关键词：

Chloride; Localized corrosion; Pitting factor; Macrocell; PITTING CORROSION; RELIABILITY; CRACK; PROPAGATION; BAR;

D O I：

10.1016/j.conbuildmat.2014.09.030

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Pitting corrosion of reinforcement often causes localized concrete cracking in chloride contaminated RC structures. This paper presents a 3-D computational model to examine the localized corrosion of steel rebar under chloride attack. Both circumferential and longitudinal macrocell corrosion have been integrated into the numerical model. Modeling results show that macrocell corrosion controls the localized/pitting corrosion process. Highly localized corrosion pattern may occur due to extremely large cathode/anode ratio. As corrosion front advances around reinforcement, macrocell corrosion may reduce drastically and pitting factor also decreases. Parametric study indicates that chloride diffusion significantly influences pitting factor while longitudinal cathode/anode ratio controls localized macrocell corrosion. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：434 / 443

页数：10

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