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Probing of Steel Bar Inside Mortar Specimens Using Electromagnetic Wave Method

  • 김우석 (연세대학교 대학원 건축공학과) ;
  • 박경현 (연세대학교 대학원 건축공학과 공학석사) ;
  • 임홍철 (연세대학교 건축공학과)
  • 발행 : 1999.10.01

초록

Ground Penetrating Radar (GPR) attached with 1 GHz center frequency antenna has been used to measure a dielectric constant of mortar, and to detect and locate a steel bar embedded inside laboratory size mortar specimens at various depth. Mortar specimens are made for the measurements with the dimensions of 100cm (width)$\times$100cm (length)$\times$14cm (depth). Each specimen has a 13mm diameter D13 steel bar at 2, 4, 6, 8, 10 and 12cm depth. In this paper, results of radar measurments are provided with a sample output, which successfully located the bar. It has been found that the reflected wave of the steel bar interacts with that of surface when the steel bar has the close distance to the surface.

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