Evaluation of Durability Performance of Wet- Mixed Shotcrete with Powder Types Cement Mineral Accelerator

시멘트 광물계 급결제를 사용한 습식 숏크리트의 내구성 평가

  • 원종필 (건국대학교 사회환경시스템공학과) ;
  • 성상경 (건국대학교 사회환경시스템공학과) ;
  • 박찬기 (건국대학교 사회환경시스템공학과) ;
  • 조용진 (건국대학교 사회환경시스템공학과) ;
  • 최석원 (건국대학교 사회환경시스템공학과) ;
  • 박해균 (삼성물산(주)건설부문 토목사업본부 토목기술팀)
  • Published : 2004.11.01

Abstract

Recently, construction works of scale are getting larger with economic growth. Shotcreting is one of major processes in tunnels construction. Accelerator is used in tunnel and underground structures to ensure early strength of shotcrete. Silicate based accelerator and aluminate based accelerator is getting widely in the field. But these accelerators have many problems due to decesase of long-term strength and low quality of the hardened shotcrete. in order to solve these problems, recently developed powder types cement mineral accelerator. In this study, we tested chloride permeability, freezing and thawing and accelerated carbonation of shotcrete. As a result of the test, wet-mixed shotcrete with powder types cement mineral accelerator exhibited durability improvement compared to the conventional shotcrete accelerator.

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