Three-dimensional electrical capacitance tomography – A tool for characterizing moisture transport properties of cement-based materials

Water often plays a major role in the degradation processes of cement-based materials and structures, and thus the durability of these structures strongly depends on their ability to impede transport of water. This paper reports the results of imaging three-dimensional (3D) unsaturated moisture flow...

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Main Authors: Antti Voss, Payam Hosseini, Mohammad Pour-Ghaz, Marko Vauhkonen, Aku Seppänen
Format: Article
Language:English
Published: Elsevier 2019-11-01
Series:Materials & Design
Online Access:http://www.sciencedirect.com/science/article/pii/S0264127519304058
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author Antti Voss
Payam Hosseini
Mohammad Pour-Ghaz
Marko Vauhkonen
Aku Seppänen
author_facet Antti Voss
Payam Hosseini
Mohammad Pour-Ghaz
Marko Vauhkonen
Aku Seppänen
author_sort Antti Voss
collection DOAJ
description Water often plays a major role in the degradation processes of cement-based materials and structures, and thus the durability of these structures strongly depends on their ability to impede transport of water. This paper reports the results of imaging three-dimensional (3D) unsaturated moisture flow in mortar specimens using electrical capacitance tomography (ECT) imaging, which is based on non-intrusive and contact-free capacitance surface measurements. In a series of experiments, three mortar specimens with differing moisture transport properties were imaged with ECT during a 3D ingress of water. For comparison, we also modeled the flow of moisture numerically, by Finite Element Method (FEM) approximation of the 3D equation of unsaturated moisture flow in porous media, commonly referred to as Richard's equation. The ECT reconstructions are in good agreement with the flow model for all specimens which supports the ability of ECT to image 3D water transport in cement-based materials. Keywords: Cement-based materials, Unsaturated moisture flow, Electrical capacitance tomography, Imaging, Numerical flow model, Transport properties
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spelling doaj.art-96d5abb7a5404782905ac42b57b8e5f12022-12-21T19:43:59ZengElsevierMaterials & Design0264-12752019-11-01181Three-dimensional electrical capacitance tomography – A tool for characterizing moisture transport properties of cement-based materialsAntti Voss0Payam Hosseini1Mohammad Pour-Ghaz2Marko Vauhkonen3Aku Seppänen4Department of Applied Physics, University of Eastern Finland, P.O.Box 1627, FI-70211 Kuopio, Finland; Corresponding author.Department of Civil, Construction and Environmental Engineering, North Carolina State University, Raleigh, NC, USADepartment of Civil, Construction and Environmental Engineering, North Carolina State University, Raleigh, NC, USADepartment of Applied Physics, University of Eastern Finland, P.O.Box 1627, FI-70211 Kuopio, FinlandDepartment of Applied Physics, University of Eastern Finland, P.O.Box 1627, FI-70211 Kuopio, FinlandWater often plays a major role in the degradation processes of cement-based materials and structures, and thus the durability of these structures strongly depends on their ability to impede transport of water. This paper reports the results of imaging three-dimensional (3D) unsaturated moisture flow in mortar specimens using electrical capacitance tomography (ECT) imaging, which is based on non-intrusive and contact-free capacitance surface measurements. In a series of experiments, three mortar specimens with differing moisture transport properties were imaged with ECT during a 3D ingress of water. For comparison, we also modeled the flow of moisture numerically, by Finite Element Method (FEM) approximation of the 3D equation of unsaturated moisture flow in porous media, commonly referred to as Richard's equation. The ECT reconstructions are in good agreement with the flow model for all specimens which supports the ability of ECT to image 3D water transport in cement-based materials. Keywords: Cement-based materials, Unsaturated moisture flow, Electrical capacitance tomography, Imaging, Numerical flow model, Transport propertieshttp://www.sciencedirect.com/science/article/pii/S0264127519304058
spellingShingle Antti Voss
Payam Hosseini
Mohammad Pour-Ghaz
Marko Vauhkonen
Aku Seppänen
Three-dimensional electrical capacitance tomography – A tool for characterizing moisture transport properties of cement-based materials
Materials & Design
title Three-dimensional electrical capacitance tomography – A tool for characterizing moisture transport properties of cement-based materials
title_full Three-dimensional electrical capacitance tomography – A tool for characterizing moisture transport properties of cement-based materials
title_fullStr Three-dimensional electrical capacitance tomography – A tool for characterizing moisture transport properties of cement-based materials
title_full_unstemmed Three-dimensional electrical capacitance tomography – A tool for characterizing moisture transport properties of cement-based materials
title_short Three-dimensional electrical capacitance tomography – A tool for characterizing moisture transport properties of cement-based materials
title_sort three dimensional electrical capacitance tomography a tool for characterizing moisture transport properties of cement based materials
url http://www.sciencedirect.com/science/article/pii/S0264127519304058
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