한국구조물진단유지관리공학회 논문집 (Journal of the Korea institute for structural maintenance and inspection)

  • 제17권1호
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  • Pages.76-84
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  • 2013
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  • 2234-6937(pISSN)
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  • 2287-6979(eISSN)
한국구조물진단유지관리공학회 (Korea Institute for Structural Maintenance Inspection)
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숏크리트 모르타르의 성능에 대한 급결제 종류 및 고로슬래그 미분말 대체율의 영향

Effect of Types of Accelerators and Replacement Levels of GGBFS on the Performance of Shotcrete Mortars

  • 이승태 (군산대학교 토목공학과) ;
  • 김성수 (대진대학교 건설시스템공학과) ;
  • 김동규 (한국건설기술연구원 Geo 인프라연구실) ;
  • 박광필 (한국건설기술연구원 Geo 인프라연구실)
  • 투고 : 2012.07.06
  • 심사 : 2012.11.26
  • 발행 : 2013.01.30
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초록

본 연구에서는 alkali-free 및 aluminate 급결제를 사용한 OPC 및 GGBFS 숏크리트 모르타르의 응결특성, 강도특성, 전기저항성 및 염소이온 침투저항성을 실험적으로 고찰하였다. 실험결과에 따르면, alkali-free 급결제를 첨가한 GGBFS 모르타르는 응결시간 및 압축강도가 GGBFS 대체율에 관계없이 OPC 모르타르와 유사하게 나타났으나, aluminate 급결제를 첨가한 모르타르의 경우, GGBFS 대체율이 증가할수록 응결시간 및 압축강도가 크게 나타나는 경향을 보였다. 한편, 숏크리트 모르타르의 전기저항성 및 염소이온 침투저항성은 GGBFS를 50% 이상 대체한 모르타르가 우수한 경향을 나타내므로써, 적절한 대체율의 GGBFS를 사용한 모르타르가 숏크리트용 재료로써 우수한 성능을 나타낼 것으로 판단된다.

In this study, some engineering properties of OPC and GGBFS shotcrete mortars with alkali-free or aluminate accelerator were experimentally examined. As a result, GGBFS mortars with alkali-free accelerator were significantly similar to OPC mortars with same accelerator with respect to both setting time and compressive strength. Comparatively, GGBFS mortars with aluminate accelerator showed a good performance with an increased replacement of GGBFS. Furthermore, when replaced with GGBFS over 50%, the mortars exhibited superior performances of electrical resistivity and chloride ions penetration resistance. Accordingly, it is suggested that GGBFS has a beneficial effect as shotcreting materials in the condition of proper replacement levels.

키워드

참고문헌

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피인용 문헌

  1. 고로슬래그 분말 및 석회석 분말이 시멘트 광물계 급결제를 사용한 숏크리트 결합재 물성에 미치는 영향 vol.24, pp.2, 2013, https://doi.org/10.11112/jksmi.2020.24.2.86