Electrical resistance tomography to monitor unsaturated moisture flow in cementitious materials

被引：86

作者：

Hallaji, Milad ^{[1
]}

Seppanen, Aku ^{[2
]}

Pour-Ghaz, Mohammad ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Civil Construct & Environm Engn, Raleigh, NC 27695 USA

[2] Univ Eastern Finland, Dept Appl Phys, Kuopio, Finland

来源：

CEMENT AND CONCRETE RESEARCH | 2015年 / 69卷

基金：

美国国家科学基金会; 芬兰科学院;

关键词：

Concrete; Electrical Resistance Tomography (ERT); Image Analysis; Transport Properties; COVER-ZONE CONCRETE; NEUTRON-RADIOGRAPHY; WATER PENETRATION; RESISTIVITY TOMOGRAPHY; IMPEDANCE TOMOGRAPHY; CRACKS; ABSORPTION; STRAIN; DAMAGE; QUANTIFICATION;

D O I：

10.1016/j.cemconres.2014.11.007

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Traditionally the electrically-based assessment of the moisture flow in cement-based materials relies on two- or four-point measurements. In this paper, imaging of moisture distribution with electrical resistance tomography (ERT) is considered. Especially, the aim is to study whether ERT could give information on unsaturated moisture flows in cases where the flow is non-uniform. In the experiment, the specimens are monitored with ERT during the water ingress. The ERT reconstructions are compared with neutron radiographs, which provide high resolution information on the 2D distribution of the moisture. The results indicate that ERT is able to detect the moisture movement and to show approximately the shape and position of the water front even if the flow is nonuniform. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：10 / 18

页数：9

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