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Title |
Development of Thickness Measurement Method From Concrete Slab Using Ground Penetrating Radar
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Authors |
이태민(Taemin Lee) ; 강민주(Minju Kang) ; 최민서(Minseo Choi) ; 정선응(Sun-Eung Jung) ; 최하진(Hajin Choi) |
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DOI |
https://doi.org/10.11112/jksmi.2022.26.3.39 |
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Keywords |
지표투과레이더; 전자기파; 상대유전율; 소음저감구조 Ground penetrating radar; Electromagnetic wave; Di-electric permittivity; Noise reduction structure |
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Abstract |
In this paper, we proposed a thickness measurement method of concrete slab using GPR, and the verification of the suggested algorithm was carried out through real-scale experiment. The thickness measurement algorithm developed in this study is to set the relative dielectric constant based on the unique shape of parabola, and time series data can be converted to thickness information. GPR scanning were conducted in four types of slab structure for noise reduction, including finishing mortar, autoclaved lightweight concrete, and noise damping layer. The thickness obtained by GPR was compared with Boring data, and the average error was 1.95 mm. In order to investigate the effect of finishing materials on the slab, additional three types of finishing materials were placed, and the following average error was 1.70 mm. In addition, sampling interval from device, the effect of radius on the shape of parabola, and Boring error were comprehensively discussed. Based on the experimental verification, GPR scanning and the suggested algorithm have a great potential that they can be applied to the thickness measurement of finishing mortar from concrete slab with high accuracy.
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