Transactions on Transport Sciences 2008, 1(4):203-210 | DOI: 10.5507/tots.2008.026

NDT of Reinforcement Corrosion Using Ultrasonic Spectroscopy

M. Kořenská*,1, M. Matysík1, K. Pospíšil2
1 Department of Physics, Faculty of Civil Engineering, Brno University of Technology, Brno, Czech Republic
2 CDV - Transport Research Centre, Brno, Czech Republic

Corrosion of built-in steel reinforcement ranks among the most serious mechanisms of bridge structure degradation. There are many reasons for the corrosion to occur: failures occurring during the bridge construction, consequences of traffic load, or, simple, ageing of the structures. Visual inspection of a bridge provides general information on the bridge condition. However, it cannot provide any information on the internal structure and integrity of the reinforced concrete or pre-loaded elements of the bridge in question. This is why non-destructive diagnostic methods are acquiring growing importance, helping researchers to properly evaluate the condition of a bridge and decide upon the most convenient methods for maintenance, repair or refurbishment of the bridge in question or its parts and schedule them accordingly.
In this domain, methods employing the non-linear acoustic spectroscopy (NEWS - Nonlinear Elastic Wave Spectroscopy) achieved rush advancement recently. They are based on the fact that a non-linearity, which is due to the presence of a defect, makes an extraordinary indicator of the structure damage. These new, non-destructive methods appear to be promising for application to a wide range of materials featuring relatively heavy non-homogeneities, and for a large span of sites, from micro-chip to bridge structures. The present paper deals with an experimental study of the application of non-linear ultrasonic spectroscopy methods to the detection of steel reinforcement corrosion and its consequences for reinforced concrete specimens subjected to corrosion induced degradation cycles.

Keywords: Reinforced concrete, reinforcement corrosion, nonlinear ultrasonic spectroscopy, nonlinear effects

Published: December 1, 2008  Show citation

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Kořenská, M., Matysík, M., & Pospíšil, K. (2008). NDT of Reinforcement Corrosion Using Ultrasonic Spectroscopy. Transactions on Transport Sciences, 1(4), 203-210. doi: 10.5507/tots.2008.026
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