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- W1985252585 abstract "Assessing internal damage levels in concrete roadways is an excellent opportunity for the application of nondestructive evaluation techniques, such as ground penetrating radar (GPR). Concrete roadways, particularly those on bridges, are high- performance structural elements that are subjected to severe environmental and mechanical stresses. These stresses cause corrosion of reinforcing bars, the promotion of internal cracking, eventually large-scale spalling, and the formation of deep potholes. This damage usually initiates internally and does not appear on the surface until it is at an advanced state. The use of asphalt overlays further exacerbates this problem. One of the most important, yet difficult to identify, defects is a delamination, which can be due to expansion associated with reinforcing bar corrosion. The GPR reflections from a delamination can be relatively weak, whereas the reflection from a reinforcing bar can be fairly strong. This paper presents the results of a laboratory and field study that focused on GPR methods of detecting delaminations in concrete roadways. The measurement technique used 0.5 to 6.0 GHz air-coupled waves to probe the roadways. Delaminations as small as 0.5 mm were stimulated and detected in the laboratory. Field measurements are suggestive that this technique can be effective for field use." @default.
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- W1985252585 date "2000-04-27" @default.
- W1985252585 modified "2023-10-18" @default.
- W1985252585 title "<title>Damage detection in roadways with ground penetrating radar</title>" @default.
- W1985252585 doi "https://doi.org/10.1117/12.383542" @default.
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