Non-destructive evaluation of cracks in massive concrete using normal dc resistivity logging |
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| Affiliation: | 1. Laboratoire I2M, Université de Bordeaux, Avenue des facultés, Bât.18, 33405 Talence Cedex, France;2. Département Génie Civil, Université de Sherbrooke, Sherbrooke, QC, Canada J1K 2R1;1. UNIDEMI, Departamento de Engenharia Mecânica e Industrial, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal;2. Institute of Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;1. School of Mechanical, Electronic and Industrial Engineering, University of Electronic Science and Technology of China, No.2006, Xiyuan Road, Hi-Tech Industrial Development Zone, Chengdu, Sichuan 611731, PR China;2. Shanghai Spaceflight Precision Machinery Research Institute, Shanghai, PR China;1. MTA-PTE High Intensity THz Research Group, Ifjúság útja 6, 7624 Pécs, Hungary;2. University of Pécs, Institute of Physics, Ifjúság útja 6, 7624 Pécs, Hungary;3. Budapest University of Technology, Economics Department of Construction Materials and Engineering Geology, M?egyetem rkp. 3, H-1111 Budapest, Hungary;4. Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), P.O. Box 1385, Heraklion, Crete 71110, Greece |
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| Abstract: | Discontinuities are one of the most harmful damage to the durability of concrete structures. Currents approaches are limited to assessments of surface damages, even if non-destructive methods appear to be effective for the detection and the location of cracks. That is why, these methods might be unsuitable for investigation of massive concrete body as dams and locks. Present works aim at the presentation of new results with electrical resistivity to study damages within concrete structures. In this article, the electrical resistivity focused on the study of cracks and discontinuities (concrete joints, interfaces…) in massive concrete structures by measurements done in preexisting boreholes. The used array is the normal dc resistivity logging. The study presents numerical and experimental results. First, modeling allows correcting experimental data. Then, development shows the sensitivity relatively to the discontinuity characteristics (aperture and the resistivity contrast between the discontinuity and the concrete). The tests on a real structure are carried out to define the methodology for on-site measurement. Results support the modeling. |
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| Keywords: | Normal resistivity Borehole logging Concrete Cracks |
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