Visualized tracing of rebar corrosion evolution in concrete with x-ray micro-computed tomography method

被引：50

作者：

Dong, Biqin ^{[1
]}

Shi, Guiyun ^{[1
]}

Dong, Peng ^{[1
]}

Ding, Weijian ^{[1
]}

Teng, Xiaojuan ^{[1
]}

Qin, Shaofeng ^{[1
]}

Liu, Yuqing ^{[1
]}

Xing, Feng ^{[1
]}

Hong, Shuxian ^{[1
]}

机构：

[1] Shenzhen Univ, Dept Civil Engn, Guangdong Prov Key Lab Durabil Marine Civil Engn, Key Lab Durabil Civil Engn Shenzhen, Shenzhen 518060, Peoples R China

来源：

CEMENT & CONCRETE COMPOSITES | 2018年 / 92卷

基金：

中国国家自然科学基金;

关键词：

Corrosion morphology; Rebar; Chloride ion; X-ray micro-computed tomography; Corrosion model; INDUCED REINFORCEMENT CORROSION; INDUCED COVER CRACKING; CARBON-STEEL; PITTING CORROSION; MICROSTRUCTURE; PERFORMANCE; RESISTANCE; BEHAVIOR;

D O I：

10.1016/j.cemconcomp.2018.06.003

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

A X-ray micro-computed tomography (XCT) imaging method is proposed to measure and analysis the corrosion behavior of rebar in a marine environment. The experimental results reveal that the time-dependent corrosion morphology of rebar in the three-dimensional configuration can be clearly visualized and certain corrosion parameters can be determined. Based on the characteristics analysis of XCT image, the time point of the initial rust and corrosion-induced crack are estimated. Moreover, the whole corrosion process can be divided into three phases as corrosion initiation (chloride penetration), free expansion and cracking, which agrees with the frequently used corrosion model.

引用

页码：102 / 109

页数：8

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