Bridge Deck Assessment using Ground Penetrating Radar (GPR)


GPR data were acquired across two bridge decks: one with a hot bituminous wearing surface and a second with a bare concrete slab. The acquired GPR data were interpreted, and two plan view maps were generated: one depicts the magnitude of the reflections from the uppermost mat of rebar; the second depicts the arrival time of these reflections. Core control and chloride ion concentration data show that the magnitude and arrival-time of the reflection from the upper mat of rebar is indicative of the extensiveness of bridge deck deterioration. These interpretations were also consistent with visual observations, including evidence of ponded water on the bridge deck surface. Based on the integrated analyses of available control it is estimated that 37% of the asphalt-overlaid bridge deck is deteriorated and that 54% of the concrete bridge deck is deteriorated.

Meeting Name

22nd Symposium on the Application of Geophysics to Engineering and Environmental Problems (2009: Mar. 29-Apr. 2, Fort Worth, TX)


Geosciences and Geological and Petroleum Engineering

Keywords and Phrases

Arrival Time; Chloride Ion Concentration; Ground Penetrating Radar (GPR); Integrated Analysis; Plan-view Maps; Visual Observations; Wearing Surface; Chlorine Compounds; Concrete Slabs; Geophysics; Ground Penetrating Radar Systems; Bridge Decks

International Standard Book Number (ISBN)


International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version


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© 2009 Society of Exploration Geophysicists, All rights reserved.

Publication Date

01 Mar 2009

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