Visualized investigation of defect in cementitious materials with electrical resistance tomography

被引：21

作者：

Ren, Hongwei ^{[1
]}

Tian, Kaige ^{[2
,3
]}

Hong, Shuxian ^{[2
]}

Dong, Biqin ^{[2
]}

Xing, Feng ^{[2
]}

Qin, Lei ^{[4
]}

机构：

[1] Univ Jinan, Sch Elect Engn, Jinan 250022, Shandong, Peoples R China

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

[3] China Earthquake Adm, Inst Engn Mech, Harbin 150080, Heilongjiang, Peoples R China

[4] Univ Jinan, Sch Civil Engn & Architecture, Jinan 250022, Shandong, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 196卷

基金：

中国国家自然科学基金;

关键词：

Electrical resistance tomography; Cement mortar; Defect; Visual; Imaging evaluation; REINFORCEMENT CORROSION; CARBONATION BEHAVIOR; EARLY HYDRATION; DAMAGE;

D O I：

10.1016/j.conbuildmat.2018.11.129

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Electrical resistance tomography (ERT) method is proposed to visually investigated of the defect in cementitious materials. Specimens with one precast defect are made with different water-cement (w/c) ratio and detected using the embedded electrodes. The experimental images are assessed with a similarity evaluation method based on color histogram. In addition, the electrical resistivity and moisture content of the specimens are measured simultaneously to explore its effects on the quality of the imaging results. The results show that the moisture content is the main factor influencing the resistivity of the specimens in the early hydration reaction while the w/c ratio becomes the main factor effecting the resistivity after the early hydration reaction. For the multi-defect detecting, the influence of electrical soft field effect cannot be neglected. The experiment results imply that ERT technique has potential in defect detection and in-situ monitoring in cement mortar. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：428 / 436

页数：9

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