Multi NDE Technology Condition Assessment of Concrete Bridge Decks by RABITTM Platform

Robotics Assisted Bridge Inspection Tool (RABITTM) overcomes one of the main causes of limited use of nondestructive evaluation (NDE) technologies in bridge deck assessment, the speed of data collection and analysis. The robotic platform integrates four NDE technologies and high resolution imaging to characterize three most common deterioration types in concrete bridge decks: rebar corrosion, delamination, and concrete degradation, and to image features commonly recorded through visual inspection. The four NDE technologies include electrical resistivity (ER) for the assessment of concrete corrosive environment, impact echo (IE) for delamination detection, ground-penetrating radar (GPR) for concrete cover measurement, rebar mapping and qualitative condition assessment, and ultrasonic surface waves (USW) for concrete quality evaluation. The implementation of the four NDE technologies is designed to enhance the overall interpretation through their complementary use and results interpretation. Unlike traditional NDE systems, the RABITTM utilizes NDE sensor arrays that enable the system to collect data at significantly higher speeds and with significantly higher spatial resolution. The most of the NDE data are analyzed and presented in real or near real time. This is done in a van that is serving as a command centre from which all the RABIT’s operations are monitored and to which all the data being collected by RABITTM are transmitted wirelessly for storage, analysis and presentation. The data visualization platform facilitates an intuitive presentation of the main deterioration and defects: corrosion, delamination, concrete degradation and deck surface features. Finally, and unlike the current practice of separate presentation of results from individual NDE technologies, the visualization platform integrates survey results from the NDE surveys and high resolution imaging.

References
1. Barnes, L. and Trottier, J.-F. "Ground penetrating radar for network level concrete deck repair management", Journal of Transportation Engineering, ASCE, 126(3), 257-262, 2000. 2. Brown, R. D. "Mechanisms of corrosion of steel in concrete in relation to design, inspection, and repair of offshore and coastal structures", ACI SP-65: Performance of Concrete in Marine Environments, 169-204, 1980. 3. Federal Highway Administration (FHWA) National Bridge Inventory (NBI). FHWA Bridge Programs Count, Area, Length of Bridges by Highway System. http://www.fhwa.dot.gov/bridge/fc.cfm Accessed May 8, 2012. 4. Gucunski, N., Imani A., Romero, F., Nazarian, S., Yuan, D., Wiggenhauser, H., Shokouhi, P., Kutrubes, D. Nondestructive Testing to Identify Concrete Bridge Deck Deterioration. SHRP2 R06-A Report, 2011. 5. Gucunski, N., Romero, F., Imani, A. and Fetrat, F.A. "Nondestructive evaluation-based assessment of deterioration progression in concrete bridge decks", Proceedings of 92nd Annual Transportation Board Meeting, Washington, D.C., January 13-17, on CD, 2013. 6. Gucunski, N., Maher, A., Ghasemi, H. and Ibrahim, F. "Segmentation and condition rating of concrete bridge decks using NDE for more objective inspection and rehabilitation planning", Proceedings of 6th Intl. Conference on Bridge Maintenance, Safety and Management-IABMAS 2012. Stresa, Lake Maggiore, Italy, July 8-12, on CD, 2012. 7. Nazarian, S., Baker, M.R. and Crain, K. Development and Testing of a Seismic Pavement Analyzer. Report SHRP-H-375, Strategic Highway Research Program, NRC, Washington, D.C., 1993 8. Sansalone, M. J. "Detecting delaminations in concrete bridge decks with and without asphalt overlays using an automated impact-echo field system", NDT in Civil Engineering, Proceedings of Intl. Conference of British Institute of Non-Destructive Testing, Liverpool, U.K., April 14-16, 807-820, 1993.
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