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Evaluation of Anti-Corrosion Performance of FRP Hybrid Bar with Notch in GGBFS Concrete

GGBFS 콘크리트에 매립된 Notch를 가진 FRP Hybrid Bar의 부식저항성 평가

  • Received : 2016.02.25
  • Accepted : 2016.03.09
  • Published : 2016.07.01

Abstract

Concrete structure is a construction material with durability and cost-benefit, however the corrosion in embedded steel causes a critical problem in structural safety. This paper presents an evaluation of chloride resistance and pull-off performance with various corrosion level. For the work, OPC(Ordinary Portland Cement) concrete and GGBFS(Ground Granulated Blast Furnace Slag) concrete are prepared with normal steel. Artificially notch induced FRP Hybrid Bar is also prepared and embedded in OPC concrete and accelerated corrosion test is performed. Through the test, FRP Hybrid Bar with notch is evaluated to have insignificant effect on pull-off capacity when corroded steel shows only 21% level of pull-off capacity. Furthermore GGBFS concrete with normal steel shows over 70% level of pull-off capacity due to reduced corrosion currency.

Keywords

Durability;Corrosion;Pull-off test;GGBFS;FRP hybrid bar

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Acknowledgement

Grant : FRP Hybrid Bar를 활용한 해양항만구조물 수명향상기술 개발

Supported by : 한국건설기술연구원