Effects of Concrete Delamination and Cracking on Electrical Resistivity Measurement Results
Conference: Publication Date: 27 August 2018Testing Method:
Electrical resistivity is one of the nondestructive evaluation techniques commonly used in the assessment of concrete’s corrosive environment and to it anticipated reinforcement’s corrosion rate. Electrical resistivity measurements are commonly done using a four-electrode Wenner probe. The assumption of the measurement is that the material tested is in general homogenous, with respect to its electrical conductivity. The effect of anomalies, like presence of cracks and delamination, or significant variations in the concrete’s electrical conductivity, on the measured electrical resistivity is less understood. The results of the analysis of the effect of delamination and cracking on electrical resistivity (ER) measurements in concrete are presented. The analysis was done through a numerical simulation of a Wenner probe ER testing by the COMSOL Multiphysics® finite element software. The numerical solution was validated through a comparison of results with an analytical solution. A parametric study was conducted on a model of a concrete deck with and without delamination and cracks, where the thickness, depth, orientation and moisture condition of a delamination was varied. Models for sixty cases were generated, and the corresponding electrical resistivity, for the assumption of the Wenner probe setup, evaluated. The results show that an increase in the delamination thickness and moisture content has a significant impact on the measured ER. The effect of the delamination decreases with an increase of the depth of delamination, while the orientation angle of delamination has a significant effect on the measured ER.
- Li, C. Q., Zheng, J. J., Lawanwisut, W., & Melchers, R. E. (2007). Concrete delamination caused by steel reinforcement corrosion. Journal of Materials in Civil Engineering, 19(7), 591-600.
- Shokouhi, P., Wöstmann, J., Schneider, G., Milmann, B., Taffe, A., & Wiggenhauser, H. (2011). Nondestructive detection of delamination in concrete slabs: Multiple-method investigation. Transportation Research Record: Journal of the Transportation Research Board, (2251), 103-113.
- Ferracuti, B., Savoia, M.A.Z.Z.O.T.T.I., & Mazzotti, C. (2007). Interface law for FRP–concrete delamination. Composite structures, 80(4), 523-531.
- Lataste, J. F., Sirieix, C., Breysse, D., & Frappa, M. (2003). Electrical resistivity measurement applied to cracking assessment on reinforced concrete structures in civil engineering. NDT & E International, 36(6), 383-394.
- Turon, A., Camanho, P. P., Costa, J., & Dávila, C. G. (2006). A damage model for the simulation of delamination in advanced composites under variable-mode loading. Mechanics of Materials, 38(11), 1072-1089.
- Sengul, O., & Gjørv, O. E. (2008). Electrical resistivity measurements for quality control during concrete construction. ACI Materials Journal, 105(6), 541-547.
- Broomfield, J. P. (2002). Corrosion of steel in concrete: understanding, investigation and repair. CRC Press.
- Chen, Z. J. (2004). Effect of reinforcement corrosion on the serviceability of reinforced concrete structures. Master's thesis, Department of Civil Engineering, University of Dundee, UK.
- Bazant, Z. P. (1979). Physical model for steel corrosion in concrete sea structures-theory. ASCE J Struct Div, 105(6), 1137-1153.
- Gucunski, N., Kee, S., La, H., Basily, B., & Maher, A. (2015). Delamination and concrete quality assessment of concrete bridge decks using a fully autonomous RABIT platform. Structural Monitoring and Maintenance, 2(1), 19-34.
- Oh, T., Popovics, J. S., Ham, S., & Shin, S. W. (2012). Improved interpretation of vibration responses from concrete delamination defects using air-coupled impact resonance tests. Journal of Engineering Mechanics, 139(3), 315-324.
- Warhus, J. P., Mast, J. E., & Nelson, S. D. (1995, May). Imaging radar for bridge deck inspection. In Nondestructive Evaluation of Aging Bridges and Highways (Vol. 2456, pp. 296-306). International Society for Optics and Photonics.
- Nazarian, S., Baker, M., & Crain, K. (1997). Assessing quality of concrete with wave propagation techniques. Materials Journal, 94(4), 296-305.
- Elkey, W., & Sellevold, E. J. (1995). Electrical resistivity of concrete.
- Samouëlian, A., Cousin, I., Tabbagh, A., Bruand, A., & Richard, G. (2005). Electrical resistivity survey in soil science: a review. Soil and Tillage research, 83(2), 173-193.
- Vogelsang, D. (2012). Environmental geophysics: A practical guide. Springer Science & Business Media.
- Yu-Ling, W., Yan-Wen, W., Chang-Xin, N., & Lu, D. (2012, December). 2D Modelling and Simulation of DC Resistivity Using Comsol. In Instrumentation, Measurement, Computer, Communication and Control (IMCCC), 2012 Second International Conference on (pp. 1602-1605). IEEE.
- COMSOL Multiphysics User’s Guide.
- Homepage of COMSOL Multiphysics software (2018). Available on: http: //www. comsol.com.
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