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Fire Resistance Performance of High Strength Concrete with Fiber Types

섬유 종류에 따른 고강도 콘크리트의 내화성능에 관한 실험적 연구

  • Kim, Jeong-Jin (Research & Development Institute, LOTTE Engineering & Construction)
  • Received : 2014.01.06
  • Accepted : 2014.04.02
  • Published : 2014.06.20

Abstract

In this study, the fire resistance of high strength concrete with organic fibers and polymer powder (PW) was investigated. Two types of the specimens of ${\phi}100{\times}200mm$ and $300{\times}300{\times}600mm$ sizes were prepared. As a result of the test, it was found that the fiber-to-PW mixing ratio of 1:1 achieved the highest fluidity. Further, it was found that the mixing ratios of PP 0.05% + PW 0.05%, PNY 0.05% + PW 0.05% was sufficient to protect the high strength concrete from spalling. For the mock-up specimens of $300{\times}300{\times}600mm$ size, if the required amounts of fibers were added in the concrete. the concrete spalling was resisted. Likewise, in the case of the polymix (PM) together with PW, all the tested specimens were satisfactory for fire resistance performance.

본 연구에서는 고강도 콘크리트의 폭렬특성 분석 및 폭렬방지공법 개발을 위하여 유기 섬유와 PW을 혼입한 고강도 콘크리트로 ${\varphi}100{\times}200mm$ 시험체와 $300{\times}300{\times}600mm$의 모의부재를 제작하여 내화성능 시험을 실시하였다. 실험결과, 섬유 종류 및 PW혼입률 변화에 따른 특성으로, 섬유와 PW의 혼합비가 1:1일 때 유동성이 가장 우수한 것으로 나타났으며, 내화시험을 실시한 결과 PP 0.05%+PW 0.05% 및 PNY 0.05%+PW 0.05% 이상의 경우에서 고강도 콘크리트의 폭렬방지가 가능한 것으로 확인되었다. 또한, $300{\times}300{\times}600mm$의 모의부재는 적정량의 섬유를 혼입한 경우 모든 시험체에서 폭렬이 방지되는 것으로 나타났다. 한편, PW을 혼합한 폴리믹스의 경우도 내화성능면에서 모두 만족하는 것으로 나타났다.

Keywords

References

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Cited by

  1. Research trends and design guidelines for fire resistance of structural concrete in South Korea vol.69, pp.7, 2017, https://doi.org/10.1680/jmacr.15.00361