Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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A Study on the Mechanical Properties of Fiber Reinforced Concrete by Kenaf Dosages

양마의 혼입량에 따른 섬유보강 콘크리트의 역학적 특성에 관한 연구

  • Kwon, Yeong-Ho (Depart. of Archtecture and Fire service Administration, Dong Yang University) ;
  • Jun, Woo-Chul (Doosan ENC, Rexcon QC team)
  • 권영호 (동양대학교 건축소방행정학과) ;
  • 전우철 (두산건설 렉스콘 품질관리팀)
  • Received : 2014.02.17
  • Accepted : 2014.03.19
  • Published : 2014.03.30
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Abstract

The purpose of this study is to establish experimentally the mechanical properties of fiber reinforced concrete using kenaf dosages and propose the usable method of kenaf fiber in the concrete industry as natural fiber materials. Kenaf fiber help make the concrete strength including tensile and flexural stronger, more resistant to plastic and drying shrinkage, less amount of carbon dioxide because of having a rough surface and excellent tensile strength of fiber and improving the concrete's corrosion resistance. It is to select the kenaf dosages of 4 cases (0, 0.3, 0.6 and $0.9kg/m^3$ and perform various tests including slump, air content, plastic and drying shrinkage, flexural and tensile strength for fiber reinforced concrete. The results of this study are as follows : In case of increasing kenaf fiber dosages, show the slump decrease and air content increase, also take effect results for increasing concrete strength including flexural and tensile, decreasing plastic and drying shrinkage. therefore, considered test results and cost, the optimum dosages of kenaf fiber is proposed about $0.6kg/m^3$ and need to study on the site application considering concrete quality and another compared tests.

본 연구에서는 천연섬유인 양마를 섬유보강 콘크리트에 사용하기 위한 방안으로, 양마의 혼입량에 따른 콘크리트의 역학적 특성을 실험적으로 확인하였다. 양마는 표면이 거칠고 섬유의 인장력 및 부식저항성이 우수하기 때문에, 섬유보강재로 적용할 경우에 콘크리트의 인장강도 및 부착력 증대에 의한 균열저감 효과, 그리고 이산화탄소를 저감하는 친환경 재료로 기대된다. 이러한 연구를 위하여 기본배합 조건에 양마의 혼입량 4종류(0, 0.3, 0.6 및 $0.9kg/m^3$)를 대상으로 슬럼프, 공기량, 소성수축 균열 및 압축강도, 할열인장강도, 휨강도, 그리고 건조수축량 등에 대한 성능시험을 실시하였다. 실험결과, 양마의 혼입량이 증가할수록 슬럼프 저하 및 공기량 증대현상이 나타났지만, 차이는 크지 않았다. 특히, 할열인장강도 및 휨강도 증진에 매우 효과적이며, 소성수축균열 및 건조수축량 저감에도 큰 효과가 있는 것으로 나타났다. 따라서 콘크리트의 역학적 성능, 경제성 등을 고려하여 양마의 혼입량은 $0.6kg/m^3$로 사용하는 것이 가장 적합한 것으로 나타났으며, 향후 사용성 및 비교시험을 통한 현장적용성의 검토가 필요할 것으로 사료된다.

Keywords

References

  1. Elsaid, A., Dawood, M., Dawood, R., and Seracino, R., (2011). Mechanical properties of kenaf fiber reinforced concrete, Construction and Building Material, 25(4), 1991-2001. https://doi.org/10.1016/j.conbuildmat.2010.11.052
  2. Han, C.G., Han, M.C., and Shin, H.S., (2007). Effect of the Nylon and Cellulose Fiber Contents on the Mechanical Properties of the Concrete, Journal of the Korea Institute of Building Construction, 7(3), 83-90. https://doi.org/10.5345/JKIC.2007.7.3.083
  3. Han, C.G., Kim, B.G., Lee, K.C., and Kim, K.L., (2006). Influence of Orgarnic Fiber Kinds on Engineering Properties of Concrete, Proceedings of the Korea Institute of Building Construction, 6(1), 27-30.
  4. Mohanty, A.K., Misra, M., and Drzal, L.T., (2005). Natural fibers, bio polymers, and bio composites, CRC press, Taylor and Francis group.
  5. Suh, J.M., (2007). Processing and properties of Jute/PLA and Kenaf/PLA bio composites, Ph.D Thesis, Kumoh National Institute of Technology, Korea.
  6. Won, J.P., and Park, C.G., (2000). Effects of Specialty Cellu-lose Fibers on Imorovement of Flexural Performance and Control of Cracking of Concrete, Journal of the Korea Concrete Institute, 12(2), 89-98.
  7. Won, J.P., Park, C.G., and Ahn, T.S., (1998). Experimental Study for Plastic Shrinkage Cracking of Cellulose Fiber Reinforced Concrete, Proceedings of the Korea Concrete Institute, 10(2), 319-323.
  8. Yoon, K.W., Kim, D.Y., Jun, I.G., Lee, J.H., and Park, Y.G., (2010). Research for Performance Evaluation of Crack Reduction in Fiber Reinforced Concrete with Using Jutes, Proceedings of the Korea Institute of Building Construction, 10(1), 53-55.
  9. Yoon, K.W., Kim, D.Y., Jun, I.G., Lee, J.H., and Park, Y.G., (2011). Evaluation of the Basic Properties of Concrete with Types of Cellulose Fibers, Journal of the Korea Institute of Building Construction, 11(5), 419-425. https://doi.org/10.5345/JKIBC.2011.11.5.419