콘크리트학회논문집 (Journal of the Korea Concrete Institute)

  • 제12권3호
  • /
  • Pages.115-123
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  • 2000
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  • 1229-5515(pISSN)
  • /
  • 2234-2842(eISSN)
한국콘크리트학회 (Korea Concrete Institute)
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비파괴 시험을 위한 콘크리트의 전자기적 특성의 측정

Measurement of Electromagnetic Properties of Concrete for Nondestructive Testing

  • 임홍철 (연세대학교 건축공학과) ;
  • 정성훈 (미국 University of Illinois at U규뭄-Champaign 토목공학과)
  • 발행 : 2000.06.01
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초록

Characterizing the electromagnetic properties of concrete is essential to the enhancement of accuracy and reliability in nondestructive testing of concrete structures using electromagnetic techniques. To establish a data base for the properties of concrete, a measurement technique has been developed and a set of data has been obtained for the frequency range of 1~6 GHz. As moisture content is one of major contributing factors to determine permittivity of dielectric material, moisture content is varied during the measurement. An application of a measurement system which consists of open-ended coaxial probe and automatic network analyzer to concrete and mortar specimens is studied. For this, calibration techniques, size of specimens, and number of measurements necessary to obtain reliable data are investigated. From the measured data, it is shown that moisture content plays an important role to determine the permittivity of specimens. As the moisture content increases. The permittivity of specimens show tendency to approach the permittivity of water.

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참고문헌

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