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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Format: | Article |
Language: | English |
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Elsevier
2019-11-01
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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 |
first_indexed | 2024-12-20T10:18:52Z |
format | Article |
id | doaj.art-96d5abb7a5404782905ac42b57b8e5f1 |
institution | Directory Open Access Journal |
issn | 0264-1275 |
language | English |
last_indexed | 2024-12-20T10:18:52Z |
publishDate | 2019-11-01 |
publisher | Elsevier |
record_format | Article |
series | Materials & Design |
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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