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Evaluation for Long Term Drying Shrinkage and Resistance to Freezing and Thawing of Hybrid Fiber Reinforced Concrete

하이브리드 섬유보강 콘크리트의 장기 건조수축 및 내동해성 평가

Kim, Yo-Seb;Bae, Su-Ho;Lee, Hyun-Jin
김요셉;배수호;이현진

  • Received : 2018.10.31
  • Accepted : 2018.12.24
  • Published : 2019.03.01

Abstract

Many researches have been performed on hybrid fiber reinforced concrete for years, which is to improve some of the weak material properties of concrete. Researches on characteristics of hybrid fiber reinforced concrete using amorphous steel fiber and organic fiber, however, yet remain to be done. Therefore, the purpose of this research is to estimate the compressive strength, long term drying shrinkage, and resistance to freezing and thawing of hybrid fiber reinforced concrete(HFRC) using amorphous steel fiber and polyamide fiber as one of organic fibers. For this purpose, HFRCs containing amorphous steel fiber and polyamide fiber were made according to their total volume fraction of 1.0% for target compressive strength of 40 and 60 MPa, respectively, and then the compressive strength, length change, and resistance to freezing and thawing of these were evaluated. As a result, the long term length change ratio of HFRC used in this study decreased by more than 30%, 25% than plain concrete at 365 and 730 days, respectively, and the durability factor of HFRC was very excellent as more than 90%.

Keywords

Hybrid Fiber Reinforced Concrete;Amorphous Steel Fiber;Polyamide Fiber;Long Term Drying Shrinkage;Resistance to Freezing and Thawing

Acknowledgement

Supported by : 안동대학교