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Evaluation of Mechanical and Durability Performance of Mortar Shotcrete

모르타르 숏크리트의 역학성능 및 내구성능 평가

  • 박병선 (한국건설생활환경시험연구원 건설기술연구센터) ;
  • 장건영 (한국건설생활환경시험연구원 건설기술연구센터) ;
  • 최영철 (가천대학교 토목환경공학과)
  • Received : 2019.07.03
  • Accepted : 2019.08.29
  • Published : 2019.09.01

Abstract

In this study, the mechanical property and durability of improved bond performance mortar shotcrete was investigated. Mortar shotcrete was prepared by replacing coarse aggregate with 100% fine aggregate in the shotcrete mixture proportion proposed in the road construction standard specification. OPC, GGBFS and anhydrite were used as binders, and polymer powder was substituted for 1% and 2% of binder for improving bond property. From the experimental results, it was found that the compressive strength decreased with increasing polymer addition, but the bond strength increased. The addition of polymer to mortar shotcrete also reduced the drying shrinkage and improved the resistance to carbonation. Initial hydration heat of mortar shotcrete decreased with the addition of polymer, and it was judged that the initial compressive strength decreased.

Keywords

Shotcrete;Bond Strength;Mechanical property;Durability

Acknowledgement

Supported by : 국토교통부, 가천대학교

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