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http://dx.doi.org/10.12652/Ksce.2020.40.3.0285

A Consideration on the Electromagnetic Properties of Road Pavement Using Ground Penetrating Radar (GPR)  

Rhee, Jiyoung (Korea Expressway Corporation Research Institute)
Shim, Jaewon (Korea Expressway Corporation Research Institute)
Lee, Sangrae (Korea Expressway Corporation Research Institute)
Lee, Kang-Hyun (Korea Expressway Corporation Research Institute)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.40, no.3, 2020 , pp. 285-294 More about this Journal
Abstract
This study investigated the use of Ground Penetrating Radar (GPR) over a two-decade period on public roads, focusing on the electromagnetic characteristics of the pavement dielectrics and attenuation. From the results, a typical range of characteristic value, influencing factors, and a correction method were suggested. The typical dielectrics of asphalt pavements were 4-7, as measured by an air-coupled 1 GHz GPR antenna. The dielectrics of concrete pavements were very large in the early age, but were drastically reduced with ageing. Ten years on, collection was in the range of 6-12. The dielectrics were proportional to the relative humidity (R.H.) of the atmosphere. The effects were reduced to one eighth with an overlay. Attenuation generally increased with thickness of the road layer, and also increased where there was damage. The GPR results could also vary depending on the weather conditions as well as on the characteristics of the GPR equipment, even at the same frequency. Therefore, GPR surveys should be performed on road surfaces without debris on a single, fine day. The reliability of the GPR analysis could be improved by cores and equipment calibration with other non-destructive test surveys.
Keywords
GPR; Road pavement; Electro-magnetic characteristics; Dielectric constant; Attenuation;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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