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International Journal of Concrete Structures and Materials
Fig. 10 | International Journal of Concrete Structures and Materials

Fig. 10

From: Evaluation of the Depth of Deteriorations in Concrete Bridge Decks with Asphalt Overlays Using Air-Coupled GPR: A Case Study from a Pilot Bridge on Korean Expressway

Fig. 10

Condition map based on the relative permittivity of concrete measured by air-coupled GPR system on the pilot bridge: red lines indicates the relative permittivity values of 6 and 12. For a comparison, various types of damages on the surface in Fig. 5 are shown in the figure ( : core, : surface-breaking cracks, : efflorescence, : patching and : pothole).

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