Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)

Korean Geotechnical Society (한국지반공학회)
권호 표지

An Investigation on the Quality of High-Strength Shotcrete and the Long Term Durability using Combined Deterioration Test

고강도 숏크리트의 품질평가와 복합열화시험을 통한 장기내구성 검토

  • Ma, Sang-Joon (Geotechnical Engineering Research Dept., Korea Institute of Construction Technology) ;
  • Kim, Dong-Min (Geotechnical Engineering Research Dept., Korea Institute of Construction Technology) ;
  • Choi, Jae-Seok (Weathering Test & Evaluation Center, Korea Institute of Construction Materials) ;
  • Ahn, Kyung-Chul (Geotechnical/Tunnel Engineering Dept., TESO Engineering Co., Ltd.) ;
  • Kim, Sun-Myung (Bau consultant Co., Ltd.) ;
  • Ko, Jin-Kon (Construction Office II, Korea National Oil Corporation)
  • 마상준 (한국건설기술연구원 지반연구부) ;
  • 김동민 (한국건설기술연구원 지반연구부) ;
  • 최재석 (한국건자재시험연구원 내후성시험평가센터) ;
  • 안경철 ((주) 태조엔지니어링 지반사업부) ;
  • 김선명 ((주)바우컨설턴트) ;
  • 고진곤 (한국석유공사 제2건설사무소)
  • Published : 2006.03.24
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, Field test was performed using high-quality additions and accelerators to obtain the improvement of the strength on domestic shotcrete and quality test based on EFNARC was performed. In addition, Deterioration test that combined the Freezing-thawing and Carbonation was also performed in order to investigate a long-term durability of high-strength shotcrete. As a result of field test, a promotion ratio of early strength is $90\sim97%$ in case of using alkali-free accelerators. And a compressive strength of shotcrete using Micro-silica fume was $45.2\sim55.8MPa$ and the flexible strength was $5.01\sim6.66MPa$, so a promotion ratio of strength was $37\sim79%$, $17\sim61%$ respectively. It was showed that increment effect of strength by the Micro-silica fume replacement of $7.5\sim10%$ for cement mass was remarkable. It was also realized that application of Micro-silica fume to shotcrete reduced deterioration and improved a long-term durability of shotcrete.

Keywords