Can Electrical Resistance Tomography be used for imaging unsaturated moisture flow in cement-based materials with discrete cracks?

被引：67

作者：

Smyl, Danny ^{[1
]}

Rashetnia, Reza ^{[1
]}

Seppanen, Aku ^{[2
]}

Pour-Ghaz, Mohammad ^{[1
]}

机构：

[1] North Carolina State Univ, Dept Civil Construct & Environm Engn, Campus Box 7908,431C Mann Hall, Raleigh, NC 27695 USA

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

来源：

CEMENT AND CONCRETE RESEARCH | 2017年 / 91卷

基金：

芬兰科学院;

关键词：

Crack detection; Finite element analysis; Image analysis; Mortar; Transport properties; IMPEDANCE TOMOGRAPHY; TRANSPORT-PROPERTIES; COVER-ZONE; TIKHONOV REGULARIZATION; HYDRAULIC CONDUCTIVITY; WATER-ABSORPTION; CONCRETE; MODEL; PERMEABILITY; INGRESS;

D O I：

10.1016/j.cemconres.2016.10.009

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Previously, it has been shown that Electrical Resistance Tomography (ERT) can be used for monitoring moisture flow in undamaged cement-based materials. In this work, we investigate whether ERT could be used for imaging three-dimensional (3D) unsaturated moisture flow in cement-based materials that contain discrete cracks. Novel computational methods based on the so-called absolute imaging framework are developed and used in ERT image reconstructions, aiming at a better tolerance of the reconstructed images with respect to the complexity of the conductivity distribution in cracked material. ERT is first tested using specimens with physically simulated cracks of known geometries, and corroborated with numerical simulations of unsaturated moisture flow. Next, specimens with loading-induced cracks are imaged; here, ERT reconstructions are evaluated qualitatively based on visual observations and known properties of unsaturated moisture flow. Results indicate that ERT is a viable method of visualizing 3D unsaturated moisture flow in cement-based materials with discrete cracks. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：61 / 72

页数：12