한국건축시공학회지 (Journal of the Korea Institute of Building Construction)

  • 제16권5호
  • /
  • Pages.389-395
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  • 2016
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  • 1598-2033(pISSN)
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  • 2233-5706(eISSN)
한국건축시공학회 (The Korean Institute of Building Construction)
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압전소자를 이용한 시멘트계 재료의 응결 특성 평가

Setting Characteristic Assessment of Cementitious Materials using Piezoelectric Sensor

  • Lee, Chang Joon (Department of Architectural Engineering, Chungbuk National University) ;
  • Lee, Jun Cheol (School of Architecture and Civil Engineering, Kyungpook National University) ;
  • Shin, Sung Woo (Department of Safety and Engnieering, Pukyung National University) ;
  • Kim, Wha Jung (School of Architecture and Civil Engineering, Kyungpook National University)
  • 투고 : 2016.04.12
  • 심사 : 2016.07.20
  • 발행 : 2016.10.20
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초록

본 연구에서는 압전소자의 EMI 신호변화를 이용하여 시멘트계 재료의 응결특성을 평가하였다. 시멘트 페이스트에 매립된 PZT센서의 수화시간에 따른 EMI 신호변화를 비카트침 시험과 간이단열시험을 통한 수화온도곡선과 비교하였다. 실험결과, 시멘트 페이스트가 수화함에 따라 PZT센서의 EMI 공진피크와 공진주파수의 변화가 나타났으며, 이러한 변화시점은 비카트침 시험과 간이단열시험을 통한 수화온도곡선으로부터 획득한 응결시간과 부합하는 것으로 나타났다.

The evolution of electro-mechanical impedance (EMI) of the piezoelectricity (PZT) sensor was investigated to determine the setting times of cementitious materials in this study. The PZT sensor coated with non-conductive acrylic resin was embedded in cement paste before casting and the EMI signatures were continuously measured. Vicat needle test and semi-adiabatic calorimetry test were also conducted to justify the validity of EMI senssing technique in setting monitoring of cementitious materials. The results show that significant changes in EMI resonant peak magnitude and frequency during setting process were observed, and that the setting times determined by EMI sensing technique were relevant to the setting times measured by Vicat needle test and semi-adiabatic calorimetry test.

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참고문헌

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