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Open AccessFeature PaperArticle

Nondestructive Evaluation of Concrete Bridge Decks with Automated Acoustic Scanning System and Ground Penetrating Radar

Department of Civil Engineering, University of Nebraska-Lincoln, 1110 S 67th St., Omaha, NE 68182, USA
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Sensors 2018, 18(6), 1955; https://doi.org/10.3390/s18061955
Received: 1 May 2018 / Revised: 9 June 2018 / Accepted: 12 June 2018 / Published: 16 June 2018
Delamanintions and reinforcement corrosion are two common problems in concrete bridge decks. No single nondestructive testing method (NDT) is able to provide comprehensive characterization of these defects. In this work, two NDT methods, acoustic scanning and Ground Penetrating Radar (GPR), were used to image a straight concrete bridge deck and a curved intersection ramp bridge. An acoustic scanning system has been developed for rapid delamination mapping. The system consists of metal-ball excitation sources, air-coupled sensors, and a GPS positioning system. The acoustic scanning results are presented as a two-dimensional image that is based on the energy map in the frequency range of 0.5–5 kHz. The GPR scanning results are expressed as the GPR signal attenuation map to characterize concrete deterioration and reinforcement corrosion. Signal processing algorithms for both methods are discussed. Delamination maps from the acoustic scanning are compared with deterioration maps from the GPR scanning on both bridges. The results demonstrate that combining the acoustic and GPR scanning results will provide a complementary and comprehensive evaluation of concrete bridge decks. View Full-Text
Keywords: nondestructive evaluation; concrete bridge deck; acoustic scanning; GPR; delamination; deterioration nondestructive evaluation; concrete bridge deck; acoustic scanning; GPR; delamination; deterioration
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MDPI and ACS Style

Sun, H.; Pashoutani, S.; Zhu, J. Nondestructive Evaluation of Concrete Bridge Decks with Automated Acoustic Scanning System and Ground Penetrating Radar. Sensors 2018, 18, 1955.

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