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Steel Probing in Concrete Using Steel Corrosion Surface Measurement Method Modeling

철근부식 표면측정법 모델링을 통한 콘크리트 내 철근 탐사

  • Rhim, Hong-Chul (Dept. of Architectural Engineering, Yonsei University) ;
  • Ma, Hyang-Hwa (Industrial Plant Overseas Business Team, Samsung Engineering) ;
  • Lee, Suk-Yong (Dept. of Architectural Engineering, Yonsei University) ;
  • Lee, Kun-Woo (Dept. of Architecture, Kyungbok College) ;
  • Oh, Jin-Won (Dept. of Architectural Engineering, Yonsei University)
  • 임홍철 (연세대학교 건축공학과) ;
  • 마향화 (삼성엔지니어링 산업해외사업팀) ;
  • 이석용 (연세대학교 건축공학과) ;
  • 이근우 (경복대학 건축과) ;
  • 오진원 (연세대학교 건축공학과)
  • Published : 2009.04.30

Abstract

Using non-invasive surface measurement method, the corrosion state of steel embedded inside concrete can be measured by placing four electrodes on the surface of concrete. Modeling of such measurements can provide valuable information as how interfacial impedance between corroded steel and surrounding concrete results in measured impedance on the concrete surface. In this paper, the modeling of surface measurement technique is used for the determination of the sensitivity of the measurements with respect to steel bar size embedded inside concrete and cover thickness. Modeling results indicated that steel bar sizes varied from D10 to D35 could be identified. Concrete cover thickness changes from 0.02 m to 0.1 m was also distinguished using the modeling scheme. The results confirm this modeling technique is capable of determining steel bar sizes and cover thickness, as well as simulating corrosion responses.

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