KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지

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

시멘트광물계 분말형 급결제를 사용한 습식 숏크리트의 성능 평가

Park, Hae-Geun;Lee, Myeong-Sub;Won, Jong-Pil;Kim, Jae-Kwon
박해균;이명섭;원종필;김재권

  • Published : 2004.01.31

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Abstract

The use of Shotcrete (Sprayed concrete) for the support of underground excavations was pioneered by the civil engineering industry. Permanent shotcrete tunnel linings such as Single-shell, NMT (Norwegian Method of Tunnelling) have been constructed in many countries for reducing construction time and lowing construction costs instead of conventional in-situ concrete linings. Among essential technologies for successful application of Permanent Shotcrete Linings, high performance shotcrete having high strength, high durability, better pumpability has to be developed in advance. This paper presents the test results of wet-mixed Steel Fiber Reinforced Shotcrete(SFRS) with powder types cement mineral accelerator. From the results, wet-mix SFRS with powdered accelerator exhibited good early strength improvement and less rebound ratio compared to the conventional liquid accelerator.

시공기간의 단축과 시공비용 절감을 위한 Single-shell, NMT(Norwegian Method of Tunnelling)과 같은 영구 숏크리트 라이닝이 일반 콘크리트 라이닝을 대신하여 국내외에서 많이 시공되고 있다. 이러한 영구 숏크리트의 성공적인 적용을 위해서 고강도, 고내구성등 보다 나은 압송능력을 가지는 고성능 숏크리트(high performance shotcrete)의 개발이 필요하다. 본 논문은 분말형 시멘트 광물계 급결제를 사용한 강섬유보강 습식 숏크리트의 적용성을 평가한 시험결과들을 제시하였다. 시험 결과 분말형 시멘트 광물계 급결제를 사용한 강섬유보강 습식 숏크리트가 일반 액상형 급결제와 비교했을 때 우수한 성능을 보였다.

Keywords

References

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