An Experimental study on early strength of shotcrete

As there are increasing number of tunneling works these days, shotcrete is used as primary supports in order to secure the stability of tunnels. The quality of shotcrete has a direct influence on tunnels, because it is a primary support which secures the stability of completed tunnels as well as the stability of tunnels under excavation. Especially in case that ordinary shotcrete is used under weak rock conditions or at water gushing sections, more shotcrete is needed and rebound ratio increases. As a result, it is hard to keep economic feasibility. In addition to it, in subway construction, there are cases of separated excavation and it may have a bad influence on construction period or quality. Therefore, in this study, we are going to evaluate the early strength of powder type accelerator.

keywords: 연약지반, 조기강도, 분말급결제, Weak rock, early strength, powder accelerator

Reference

1. 박해균(2002), “고품질 숏크리트 개발을 위한 새로운 급결제 적용”, 한국터널공학회 논문집, 제 4권 1호, pp. 45 ～55.

2. 김용하(2003), “분말형 시멘트 광물계 급결제를 사용한 습식 숏크리트 시공사례 연구”, 한국터널공학회 학술발표회 논문집, pp. 43～49.

3. 류종현(2005), “강섬유 보강 숏크리트의 품질기준 검토”, 한국터널공학회 학술발표회 논문집, pp. 142～174.

4. 건설교통부(2009), “터널표준시방서”, (사)대한터널협회.

5. KCI-SC 102(1999), “숏크리트용 급결제 품질규격“, 콘크리트 표준시방서, 한국콘크리트학회.

6. 김진철(2004), “숏크리트용 급결제를 첨가한 시멘트 모르타르의 응결 및 강도특성”, 한국콘크리트학회 논문집, 제5권 1호, pp. 70～78

7. 안상기(1993), “숏크리트의 리바운드 감소에 대한 재료개발 연구시험”, 한국콘크리트 학회지, 제5권 1호, pp. 54～61.

8. EFNARC(1996), European Specification for Sprayed Concrete

9. 한국도로공사(2001) “강섬유보강 숏크리트의 성능향상 및 품질기준 정립(Ⅱ)”, 한국도로공사

10.

10. KS L 5103(1996), “길모아 침에 의한 시멘트의 응결시간 시험방법“, 한국표준협회

11.

11. JSCE D 102(1986), “吹府けコソクリート用急結劑品質規格“, JSCE, pp. 146～149.

12.

12. ASTM C 1141(1995), “Standard Specification for Admixture for Shotcrete”, ASTM

13.

13. ASTM C 1398(1998), “Standard Test Method For Laboratory Determination of Time Setting Hydraulic Cement Mortars Containing Additives for Shotcrete by the use Gillmore Needles”, ASTM

14.

14. ACI(1997), “Fiber Reinforced Concrete”, ACI Committee 506

바로가기메뉴

Article Contents

Vol.12 No.4

An Experimental study on early strength of shotcrete

Abstract

Reference

(사)한국터널지하공간학회