KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지

Mechanical and Early Shrinkage Crack of Hydrophilic PVA Fiber Reinforced Concrete with Fiber Volume Fraction and Fiber Length

섬유 혼입률 및 길이 변화에 따른 친수성 PVA 섬유보강 콘크리트의 역학적 성능 및 초기 수축 균열 특성

Won, Jong-Pil;Hwang, Kum-Sik;Park, Chan-Gi
원종필;황금식;박찬기

  • Published : 2005.01.31

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Abstract

This research investigated the fresh concrete properties, mechanical properties and early shrinkage crack of hydrophilic polyvinyl alcohol(PVA) fiber reinforced concrete with fiber volume fraction and fiber length. The effects of differing fiber volume fraction(0.05%, 0.07%, 0.1%, 0.15%) and fiber length(4 mm, 6 mm, 8 mm, 12 mm) were studied. Test was conducted with slump, air content, compressive strength, flexural performance, and plastic shrinkage crack of PVA fiber reinforced concrete. Test results indicated that PVA fiber reinforcement showed an ability to reduce the total crack area, maximum crack width. Also, the mechanical properties test showed that the addition of PVA fiber improved mechanical performance. Specially, optimum PVA fiber reinforced concrete were obtained using 4mm or 6mm fiber length and 0.07% fiber volume fraction.

본 연구는 섬유 혼입률 및 길이변화에 따른 친수성 폴리비닐알코올(PVA) 섬유보강 콘크리트의 굳지 않은 콘크리트 특성, 초기균열 특성 및 역학적 특성을 평가하였다. PVA 섬유의 길이(4 mm, 6 mm, 8 mm, 12 mm) 및 혼입률(0.05%, 0.07%, 0.1%, 0.15%) 변화에 따른 특성을 연구하였다. 실험은 슬럼프, 공기량, 압축강도, 휨성능 및 소성수축균열시험을 실시하였다.실험결과 PVA 섬유의 혼입은 콘크리트의 균열 폭 및 균열면적을 감소시키고, 또한 역학적 특성을 증가시키는 효과를 보여주었다. 특히, PVA 섬유의 길이 4 mm, 6 mm의 혼입률 0.07%에서 최적의 PVA 섬유보강 콘크리트를 획득할 수 있었다.

Keywords

References

  1. 김윤용(2003), 습식스프레이공법으로 타설된 고인성 섬유보강 모르타르(ECC)의 역학적 특성과 보수 성능, 한국콘크리트학회 논문집, Vol. 15, No. 3, pp. 462-469
  2. 원종필, 박찬기, 안태송, 폴리프로필렌섬유보강 콘크리트의 수축 균열 및 내구특성, 대한토목학회 논문집, pp. 783-790, 1999. 9
  3. 한만엽(1994) PPF섬유의 첨가가 콘크리트 공극구조에 미치는 영향, 대한토목학회논문집, 5(14), pp. 1081-1089
  4. Balaguru, P.(1994) Contribution of fibers to crack reduction of cement composites during the initial and final setting period, ACI Materials journal, May-Jun, pp. 280-288
  5. Bentur, A., mindess, S.(1992) Fibre reinforced cementitious composites, Elsevier Applied Science
  6. Betterman, L.R, Ouyang, C., Shah, S.P.(1995) Fiber matrix interaction in microfiber reinforced mortar, Elsevier Science Inc
  7. Christos A. Shaeles, Kenneth C. Hover(1988) Influence of mix proportions and construction operations on plastic shrinkage cracking in thin slabs, ACI Materials Journal, November-december, pp. 495-504
  8. Hikasa, J., Genba, T.(1986) Replacement for asbestos in reinforced cement products 'Kuralon' PVAfibres, properties, structure. Paper presented at the International Man-Made Fibres Congress, Austrian Chemical Institute, Austria, September
  9. JCI-SF4, Method of tests for flexural strength and flexural toughness of fiber reinforced concrete
  10. Kejin Wang, S. P. Shah, and Pariya Phuaksuk(2001) Plastic shrinkage cracking in concrete materials influence of fly ash and fibers, ACI Materials Journal, November-December, 2001
  11. Kuraray co., LTD.Asbestos Replacement, Kuraray co., LTD
  12. Nelson, P.K, Li, C.Y., Kamada, C.(2002) Fracture toughness of microfiber reinforced cement composites, Journal of Materials in Civil Engineering, September-October, pp. 384-391
  13. Soroushian, P., Mirza, .F, and Alhozaimy, A.(1995) Plastic shrinkage cracking of polypropylene fiber reinforced concrete, ACI Materials journal, Vol. 92, No.5, pp. 553-560