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A preliminary study of watertightness and salt water resistance of spray-applied membrane

뿜어붙임멤브레인의 방수성능 및 염수저항성의 기초평가

  • Choi, Soon-Wook (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Kang, Tae-Ho (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Chang, Soo-Ho (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Cheol-Ho (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Kim, Jintae (SILKROAD T&D) ;
  • Choi, Myung-Sik (SILKROAD T&D)
  • 최순욱 (한국건설기술연구원 지반연구소) ;
  • 강태호 (한국건설기술연구원 지반연구소) ;
  • 장수호 (한국건설기술연구원 지반연구소) ;
  • 이철호 (한국건설기술연구원 지반연구소) ;
  • 김진태 (실크로드티앤디 연구개발팀) ;
  • 최명식 (실크로드티앤디)
  • Received : 2017.03.17
  • Accepted : 2017.03.29
  • Published : 2017.03.31

Abstract

The leakage of tunnel causes the long-term durability of the structures such as concrete lining to deteriorate. The cause of durability degradation can be various substances contained in groundwater such as chloride, sulphate, water, and gas. In this study, a series of test were carried out to determine the watertightness performance and the resistance to salt water of the spray-applied membrane used as non-structural rock support or as a waterproof material for tunnels. As a result, it was found that the penetration of water could occur in a specimen, and the reason was that the internal pores generated by the mixing of the liquid polymer and the powder material and the internal pores were connected by the water pressure. The tensile strength of the test specimens immersed in distilled water and saline water was found to be reduced to less than half of the tensile strength in normal condition. In addition, The elongation was measured to be higher in distilled water than in salt water. However, this result will require further investigation.

Acknowledgement

Grant : 지반함몰 발생 및 피해저감을 위한 지반 안정성 평가 및 굴착.보강 기술개발

Supported by : 국토교통과학기술진흥원

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