DOI QR코드

DOI QR Code

Evalution for Mechanical Property and Durability of Miner's Shotcrete

광산용 숏크리트의 역학적 특성 및 내구성 평가

  • Received : 2014.05.21
  • Accepted : 2015.02.12
  • Published : 2015.02.28

Abstract

Mostly mine support(Rock bolt and Support) which is currently general for reinforcements of a large scale tunnel is applied, Some executing a reinforcement to Poor ground by cast-in-place shotcrete. However On domestic mine conditions that couldn't having every time after mine tunnel excavation, it couldn't ensure the field batch plant which is a fixed in an issue of economies and site security, constructing it by supply gets from shotcrete materials combined in neighborhood ready mixed concrete manufacturing plants. carried shotcrete in ready mixed concrete manufacturing plants as migration length and time are falling off in quality. But, it is difficult for construction quality control By quality control arbitrariness absence at on-scene. In the present study, carry out Laboratory Test by kinds and percentages of accelerating agent for evalution of Mechanical Property and Durability of Shotcrete.

대규모 갱도의 보강을 위해 현재 일반적인 광산 지보재(록볼트 및 강지보재)가 대부분 적용되고 있으며, 일부에서는 현장타설 숏크리트로 연약지반 보강을 실시하고 있다. 그러나 광산 갱도 굴착 후 매번 숏크리트를 타설할 수는 없는 국내 광산 여건상 경제성 및 부지확보의 문제로 고정적인 현장 배치플랜트를 확보하지 못하고, 인근 레미콘 제조 공장에서 배합된 숏크리트 재료를 공급받아 시공하고 있다. 그러나 레미콘 제조 공장에서 운반되는 숏크리트는 이동 거리 및 시간에 따라 품질이 저하되고, 광산 시공 현장에 상주하는 전문 품질관리자의 부재로 시공 품질 관리에 어려움이 많은 실정이다. 따라서 본 논문에서는 혼화재료의 종류와 혼입률을 변수로 선정하여 숏크리트의 역학적 특성과 단기 내구성 평가를 위한 실내실험을 실시하였다.

Keywords

References

  1. Kim DongMin, Ma SangJoon, Choi JaeSeok, "An Investigation on the Quality of High-Performance Shotcrete using Field Test", Korean society of Civil Engineers symposium, pp. 5639-5642, 2005.
  2. Kim DongHyun, Ryu JongHyu,, Lee SangPil. "Development of High Performance Shotcrete for PCL Method", Korean society of Civil Engineers symposium, pp. 3665-3670, 2004.
  3. Park HaeGeun, Won JongPil, Lee MyeongSub "Performance of Wet-Mixed Shotcrete with Powder Types Cement Mineral Accelerator", Korean society of Civil Engineers symposium, pp. 65-63, 2004.
  4. Chung MinChul, "Studies on the Properties of High Performance and High Strength Cement Mortar Using Meta Kaolin and Silica Fume", Journal of Korea Ceramic Societies Vol.33 No.5, pp. 519-523, 1996.
  5. Franzen, T., Grrshol, K.F. & Tomisawa, "Sprayed Concrete for final lining", Tunneling and Underground Space Technology Vol.16 pp 295-309, 2001. https://doi.org/10.1016/S0886-7798(01)00052-9
  6. Garshol, K. F., "How to Use Modern Wet Shotcrete Technology for Single Shell Permanent Tunnel Linings, proc. of the 8th Int, Conf. on Shotcrete for Underground Support VIII, pp.46-56, 1999.
  7. ASTM C 642-06 "Standard Test Method for Density, Absorption, and Voids in Hardened Concrete"