한국건설순환자원학회논문집 (Journal of the Korean Recycled Construction Resources Institute)

한국건설순환자원학회 (Korean Recycled Construction Resources Institute)
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압전센서를 이용한 플라이애시 치환 시멘트 페이스트의 응결 시점 평가

Evaluation of Setting Time in Cement Paste with Fly Ash Replacement Using Piezoelectric Sensors

  • 이준철 (서원대학교 건축학과) ;
  • 고태용 (경북대학교 지능형건설자동화센터) ;
  • 이창용 (경북대학교 지능형건설자동화센터)
  • Jun-Cheol Lee (Department of Architecture, Seowon University) ;
  • Tae-Yong Go (Intelligent Construction Automation Center, Kyungpook National University) ;
  • Chang-Yong Yi (Intelligent Construction Automation Center, Kyungpook National University)
  • 투고 : 2024.05.08
  • 심사 : 2024.05.21
  • 발행 : 2024.06.30
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초록

본 연구에서는 전기역학적 임피던스(electro-mechanical impedance, EMI) 센싱기법을 통해 플라이애시를 치환한 시멘트 페이스트의 응결시점을 평가하였다. 시멘트 중량대비 10 %, 20 %, 30 %를 플라이애시로 치환하여 물-바인더비 40 %의 시멘트 페이스트를 제조하였다. 제조된 시멘트 페이스트에 압전 센서를 매립하여 압전 센서의 EMI 신호변화를 연속적으로 모니터링하였다. EMI 센싱기법의 유효성을 검증하기 위해 비카트침 시험과 간이단열 온도시험을 동시에 수행하였다. 실험결과, 시멘트 페이스트의 응결구간에서 압전센서의 EMI 공진피크와 공진주파수에서 주목할 만한 변화가 나타났다. EMI 센싱기법에서 측정된 응결시간은 비카트침 시험과 간이단열 온도시험에서 측정된 응결시간과 상관관계가 있음을 확인하였다.

This study investigated the setting characteristics of cement paste with varying proportions of fly ash replacement using the electro-mechanical impedance (EMI) sensing technique. Cement paste samples were prepared with a water-to-binder ratio of 40 %, substituting fly ash for 10 %, 20 %, and 30 % of the cement weight. Piezoelectric (PZT) sensors were embedded in the center of each cement paste sample to continuously monitor the EMI signals. Vicat needle test and semi-adiabatic calorimetry test were conducted to validate the reliability of the EMI sensing technique in monitoring the setting of cement paste. Experimental results revealed notable changes in the magnitude and resonant frequency of the EMI resonant peaks during the setting time. It was confirmed that the setting times measured through the EMI sensing technique were correlated with those determined by the Vicat needle test and semi-adiabatic calorimetry test.

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과제정보

이 논문은 2021학년도 경북대학교 국립대학육성사업 지원비에 의하여 연구되었음.

참고문헌

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