한국건설순환자원학회논문집 (Journal of the Korean Recycled Construction Resources Institute)

한국건설순환자원학회 (Korean Recycled Construction Resources Institute)
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분말형 견운모를 혼입한 모르타르의 내화성능 연구

Investigation on Fire Resistance of Mortar Made of Powder Type Sericite

  • 박지연 (부경대학교 건축공학과) ;
  • 김소이 (부경대학교 건축공학과) ;
  • 김성하 (부경대학교 건축공학과) ;
  • 이재용 (부경대학교 건축.소방공학부) ;
  • 정철우 (부경대학교 건축.소방공학부)
  • Park, Ji-Yeon (Department of Architectural Engineering, Pukyong National University) ;
  • Kim, So-I (Department of Architectural Engineering, Pukyong National University) ;
  • Kim, Seong-Ha (Department of Architectural Engineering, Pukyong National University) ;
  • Lee, Jae-Yong (Division of Architectural and Fire Protection Engineering, Pukyong National University) ;
  • Chung, Chul-Woo (Division of Architectural and Fire Protection Engineering, Pukyong National University)
  • 투고 : 2020.12.10
  • 심사 : 2020.12.30
  • 발행 : 2021.03.30
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초록

분말형 견운모는 폐기물 재활용 차원에서 화학, 광물 분야에서 활발하게 연구가 이루어지고 있고, 비교적 저렴하게 구할 수 있는 재료이며, 일반 운모와 마찬가지로 낮은 열전도율을 가지고 있다. 따라서 본 연구에서는 분말형 견운모를 활용하여 모르타르의 열전도율을 개선하고, 이를 통해 시멘트 복합체용 내화재료로서와 활용가능성을 확인하고자 하였다. 분말형 견운모를 혼입한 시멘트 모르타르를 제작하고, 이의 열전도율 및 고온 노출 전후의 압축강도를 비교 평가하여 내화성능을 규명하고자 하였다. 실험 결과에 따르면, 분말형 견운모를 혼입하는 경우 압축강도가 감소하는 것으로 나타났으며, 혼입량 증가에 따른 압축강도의 감소는 미미하였다. 분말형 견운모를 혼입하면, 열전도율이 감소하며, 600℃, 900℃, 1,200℃에 소성된 모르타르 시험체의 잔존강도가 플레인 모르타르에 비해 높게 나타났다. 실험 결과를 종합적으로 평가해 볼 때, 분말형 견운모는 시멘트 복합체용 내화 재료로서의 활용가능성이 존재한다고 결론지을 수 있다.

Powder type sericite has been actively researched in the area of chemistry and mineralogy in terms of waste recycling. It is a material that can be obtained relatively inexpensively with a low thermal conductivity like general mica, so in order to improve the thermal conductivity of the mortar, powder type sericite was used in this work. Compressive strengths of mortar before and after high temperature exposure were compared and evaluated to determine the fire resistance of mortar with powder type sericite. According to the experimental results, it was found that the compressive strength decreased when powder type sericite was replaced with cement, but the decrease in compressive strength with the increasing amount of powder type sericite was insignificant. When powder type sericite was incorporated, the thermal conductivity decreased, and the residual strengths of the mortar specimens which were heat treated at 600℃, 900℃, and 1,200℃ were higher than that of plain mortar. From the comprehensive evaluation of the experimental results, it can be concluded that the powder type sericite has the potential to be used as a refractory material for cement composites.

키워드

참고문헌

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