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Imaging of two-dimensional unsaturated moisture flows in uncracked and cracked cement-based materials using electrical capacitance tomography
Abstract The development of visualizing tools to monitor unsaturated moisture flow in cement-based materials is of great importance, as most degradation processes in cement-based materials are connected to and take place in the presence moisture. This paper investigates the ability of electrical capacitance tomography (ECT) to image two-dimensional (2D) unsaturated moisture flow in cement-based materials. In ECT, the electrical permittivity distribution within an object is reconstructed based on measured capacitances between electrodes attached on the object’s surface. In a series of experiments, mortar specimens with and without discrete cracks were imaged with ECT during a 2D moisture ingress. The results show that ECT is able to monitor the evolution of the moisture flow, and to approximate the shape and position of the moisture front. These findings indicate that ECT is a viable method for monitoring and visualizing 2D unsaturated moisture flow in cement-based materials in the presence and absence of discrete cracks.
Imaging of two-dimensional unsaturated moisture flows in uncracked and cracked cement-based materials using electrical capacitance tomography
Abstract The development of visualizing tools to monitor unsaturated moisture flow in cement-based materials is of great importance, as most degradation processes in cement-based materials are connected to and take place in the presence moisture. This paper investigates the ability of electrical capacitance tomography (ECT) to image two-dimensional (2D) unsaturated moisture flow in cement-based materials. In ECT, the electrical permittivity distribution within an object is reconstructed based on measured capacitances between electrodes attached on the object’s surface. In a series of experiments, mortar specimens with and without discrete cracks were imaged with ECT during a 2D moisture ingress. The results show that ECT is able to monitor the evolution of the moisture flow, and to approximate the shape and position of the moisture front. These findings indicate that ECT is a viable method for monitoring and visualizing 2D unsaturated moisture flow in cement-based materials in the presence and absence of discrete cracks.
Imaging of two-dimensional unsaturated moisture flows in uncracked and cracked cement-based materials using electrical capacitance tomography
Voss, Antti (author) / Hänninen, Niko (author) / Pour-Ghaz, Mohammad (author) / Vauhkonen, Marko (author) / Seppänen, Aku (author)
Materials and Structures ; 51 ; 1-10
2018-05-09
10 pages
Article (Journal)
Electronic Resource
English
Cement-based materials , Electrical capacitance tomography (ECT) , Electrical permittivity , Imaging , Moisture flow Engineering , Structural Mechanics , Materials Science, general , Theoretical and Applied Mechanics , Operating Procedures, Materials Treatment , Civil Engineering , Building Materials
Electrical capacitance tomography to monitor unsaturated moisture ingress in cement-based materials
| Online Contents | 2016
Electrical capacitance tomography to monitor unsaturated moisture ingress in cement-based materials
| British Library Online Contents | 2016
Electrical capacitance tomography to monitor unsaturated moisture ingress in cement-based materials
| British Library Online Contents | 2016
Electrical capacitance tomography to monitor unsaturated moisture ingress in cement-based materials
| British Library Online Contents | 2016