Quantitative electrical imaging of three-dimensional moisture flow in cement-based materials

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • Danny Smyl
  • Milad Hallaji
  • Aku Seppänen
  • Mohammad Pour-Ghaz

Research units

  • North Carolina State University
  • WSP USA
  • University of Eastern Finland

Abstract

The presence of moisture significantly affects the mechanical, hydraulic, chemical, electrical, and thermal properties of cement-based and other porous materials, and therefore, methods for detecting and quantifying the moisture ingress in these materials are needed. Recent research studies have shown that the ingress of moisture in porous materials can be qualitatively imaged, with Electrical Impedance Tomography (EIT) an imaging modality which uses electrical measurements from object's surface to reconstruct the electrical conductivity distribution inside the object. The aim of this study is to investigate whether EIT could image the three-dimensional volumetric moisture content within cement based materials quantitatively. For this aim, we apply the so-called absolute imaging scheme to the EIT image reconstruction, and use an experimentally developed model for converting the electrical conductivity distribution to volumetric moisture content. The results of the experimental studies support the feasibility of EIT for quantitative imaging of three-dimensional moisture flows in cement-based materials. (C) 2016 Elsevier Ltd. All rights reserved.

Details

Original languageEnglish
Pages (from-to)1348-1358
Number of pages11
JournalInternational Journal of Heat and Mass Transfer
Volume103
Publication statusPublished - Dec 2016
MoE publication typeA1 Journal article-refereed

    Research areas

  • Electrical Impedance Tomography (EIT), Imaging, Non-destructive testing, Unsaturated moisture flow, X-ray imaging, Cement-based materials, AC-IMPEDANCE TECHNIQUES, CURRENT COMPUTED-TOMOGRAPHY, NEUTRON-RADIOGRAPHY, POROUS-MEDIA, TIKHONOV REGULARIZATION, RESISTIVITY TOMOGRAPHY, HYDRAULIC CONDUCTIVITY, WATER PENETRATION, UNSATURATED SOILS, PRIOR INFORMATION

ID: 15877572