Three Dimensional Electrical Imaging of Moisture Ingress in Mortar

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Title: Three Dimensional Electrical Imaging of Moisture Ingress in Mortar

Author(s): Danny Smyl, Milad Hallaji, Aku Seppänen and Mohammad Pour-Ghaz

Publication: Special Publication

Volume: 312

Issue:

Appears on pages(s): 1-22

Keywords: Durability, Electrical Methods, Moisture Transport, Non-Destructive Testing, imaging

Date: 10/1/2016

Abstract:
The durability performance of cement-based materials is directly related to the rate of moisture ingress in them. Moisture ingress in cement-based materials can be assessed using electricallybased methods. Traditionally, the electrically-based assessment of the moisture transport in cement-based materials has relied on two or four-point measurements, enabling onedimensional (1D) moisture flow monitoring. However, moisture ingress in cement-based materials is most often three-dimensional (3D). The objective of this paper is to investigate the feasibility of 3D electrical imaging of moisture ingress in mortar using Electrical Impedance Tomography (EIT). The EIT reconstructions are compared with the results of unsaturated moisture transport simulations using 3D Finite Element Method. The results of this study support the feasibility of EIT for 3D imaging of moisture flow in cement-based materials.