Electrical Resistance Tomography imaging of concrete

Kimmo Karhunen, Aku Seppänen, Anssi Lehikoinen, Paulo J. M. Monteiro, Jari P. Kaipio

Research output: Contribution to journalArticlepeer-review

145 Scopus citations

Abstract

We apply Electrical Resistance Tomography (ERT) for three dimensional imaging of concrete. In ERT, alternating currents are injected into the target using an array of electrodes attached to the target surface, and the resulting voltages are measured using the same electrodes. These boundary measurements are used for reconstructing the internal (3D) conductivity distribution of the target. In reinforced concrete, the metallic phases (reinforcing bars and fibers), cracks and air voids, moisture gradients, and the chloride distribution in the matrix carry contrast with respect to conductivity. While electrical measurements have been widely used to characterize the properties of concrete, only preliminary results of applying ERT to concrete imaging have been published so far. The aim of this paper is to carry out a feasibility evaluation with specifically cast samples. The results indicate that ERT may be a feasible modality for non-destructive evaluation of concrete. © 2009 Elsevier Ltd. All rights reserved.
Original languageEnglish (US)
Pages (from-to)137-145
Number of pages9
JournalCement and Concrete Research
Volume40
Issue number1
DOIs
StatePublished - Jan 2010
Externally publishedYes

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