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골재크기 및 섬유혼입률에 따른 강섬유 보강 콘크리트의 휨 성능

Effects of Aggregate Size and Fiber Volume Fraction on Flexural Properties of Steel Fiber Reinforced Concrete (SFRC)

  • 투고 : 2014.06.17
  • 심사 : 2015.01.26
  • 발행 : 2015.02.28

초록

This paper describes the effect of aggregate size and fiber volume fraction on flexural properties of steel fiber reinforced concrete(SFRC) with specified compressive strength of 60 MPa. Maximum aggregate size used was 8 and 20mm, and steel fiber volume fraction was 0, 0.5, 1, 1.5, 2% in volume basis, in this study. Flexural properties studied include first-crack strength, flexural strength and toughness index of hardened SFRC. For this purposes, three prisms ($100{\times}100{\times}400mm$) form each mixture were made and tested under four points bending on the span length 300 mm. Test results indicated that flexural strength and toughness of SFRC were improved with increasing the volume fraction. Especially, specimens with aggregate size of 8mm were reported higher improvement in flexural toughness index than those with 20mm. This phenomenon are remarkable that fiber dispersion is improved with smaller aggregate size. Also the optimum volume fraction of SFRC was presented for that with 1.5% volume fraction. Based on test results and available literatures, flexural strength prediction model was established from compressive strength, volume fraction and aspect ratio of steel fiber. The model existed a good correlation between measured data.

키워드

과제정보

연구 과제 주관 기관 : 국토교통과학기술진흥원

참고문헌

  1. ACI committee 544, "State-of-the-Art Report on Fiber Reinforced Concrete (ACI 544.1R-96)", American Concrete Institute, 1996
  2. Parviz Soroushian and Ziad Bayasi, "Fiber-Type Effects on the Performance of Steel Fiber Reinforced Concrete", ACI Material Journal, V. 88, No. 2, 1991, p.p.129-134
  3. P. Balaguru, Ramesh Narahari, and Mahendra Patel, "Flexural Toughness of Steel Fiber Reinforced Concrete", ACI Material Journal, V. 89, No. 6, 1991, p.p.54-546
  4. P.S. Song and S. Hwang "Mechanical Properties of High-Strength Steel Fiber Reinforced Concrete", Construction and Building Materials, Vo. 18, 2004, p.p.669- 673 https://doi.org/10.1016/j.conbuildmat.2004.04.027
  5. Semsi Yazici, Gozde Inan, and Volkan Tabak, "Effect of Aspect Ratio and Volume Fraction of Steel Fiber on the Mechanical Properties of SFRC" Construction and Building Materials, Vol. 21, 2007, p.p.1250-1253 https://doi.org/10.1016/j.conbuildmat.2006.05.025
  6. 김혜란, 장석준, 윤현도, "섬유 혼입률에 따른 강섬유보강 고강도 콘크리트의 작업성 및 역학적 특성", 대한건축학회 춘계학술발표대회논문집, Vol. 33, No.1, p.p.453-454
  7. Vellor S. Gopalaratnam "On the Characteriztion of Flexrual Toughness in Fiber Reinforce Conrete", Cement&Concrete Composites, 1995, p.p.239-254
  8. ACI 318-11, Building Code Requirements for Structural Concrete and Commentary, ACI Committee 318, Aemerican Concrete Institute, 2011
  9. 박완신, 윤현도, 김선웅, 장석준, 엄남용, "강섬유 보강 콘크리트 커플링 보의 변형률 특성", 대한건축학회 춘계학술발표대회논문집, Vol. 34, No. 1, p.p.315-316
  10. ASTM C1018, "Standard Test Method for Flexural Toughness and First-Crack Strength of Fiber-Reinforced Concrete (Using Beam with Third-Point Loading)", American Society for Testing Materials(ASTM), 1997
  11. Jhonston. C. D., "Definition and measurement of flexural toughness parameters for fiber reinforced concrete", Cement, Concrete and Aggregates, Vol. 4, 1982, p.p.53-60 https://doi.org/10.1520/CCA10228J
  12. N. Banthia and J. F. Trottier, "Test Methods for Fexural Toughness Characterization of Fiber Reinforced Concrete: Some Concerns and a Proposition", ACI Materials Journal, Vol. 92, No. 1, 1995, p.p.48-57
  13. ASTM C1609, "Standard Test Method for Flexural Performance of Fiber-Reinforced Concrete (Using Beam With Third-Point Loading)", ASTM, 2012
  14. KF S 2502, "굵은골재 및 잔골재의 체가름 시험방법", 한국표준협회, 2014
  15. ASTM C39, "Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens", ASTM, 2014
  16. 심재일, 양근혁, "경량 콘크리트의 유동성 및 역학적특성에 대한 굵은골재 최대크기의 영향", 대한건축학회논문집 구조계, Vol. 28, No. 5, 2012, p.p.61-68
  17. Faisal F. Wafa and Samir A. Ashour, "Mechanical Properties of High-Strength Fiber Reinforced Concrete" ACI Materials Journal, Vol. 89, No. 5, 1992, p.p.449-455
  18. 구봉근, 정경섭, 김태봉, "강섬유의 보강이 고강도 콘크리트의 강도 특성에 미치는 영향", 콘크리트학회논문집, Vol. 4, No. 2, 1992, p.p.93-101
  19. 이현호, 이화진, "강섬유 계수 및 혼입률을 고려한 SFRC의 강도 및 변형 특성", 한국콘크리트학회 논문집, Vol. 16, No. 6, 2004, p.p.759-766
  20. Oguz Akin Duzgun, Rustem Gul, and Abdulkadir Cuneyt Aydin, "Effects of steel fibers on mechanical properties of natural lightweight aggregate concrete" Material Letters, Vol. 59, 2005, p.p.3357-3363 https://doi.org/10.1016/j.matlet.2005.05.071
  21. 윤의식, 박승범, "고강도 강섬유보강 콘크리트의 역학적 특성 및 장기변형 특성에 관한 실험적 연구", 대한토목학회논문집, Vol. 26 No. 2(A), 2006, p.p.401-409
  22. Jon Thomas and Ananth Ramaswamy, "Mechanical Properties of Steel Fiber-Reinforced Concrete", Journal of Materials in Civil Engineering, Vol. 19, No. 5, 2007, p.p.385 -392 https://doi.org/10.1061/(ASCE)0899-1561(2007)19:5(385)
  23. 김윤일, 이양근, 김명성, "강섬유 혼입율이 강섬유보강 고강도 콘크리트의 작업성과 강도특성에 미치는 영향", 한국건축시공학회논문집, Vol. 8, No. 3, 2008, p.p.75-83
  24. Fuat Koksal, Fatuh Altun, Iihami Yigit, Yusa Sahin, "Combined Effect of Silica Fume and Steel Fiber on the Mechanical Properties of High Strength Concretes" Construction and Building Materials, Vol. 22, 2008, p.p.1874 -1880 https://doi.org/10.1016/j.conbuildmat.2007.04.017
  25. 오영훈, "갈고리형 감섬유를 혼입한 보통 및 고강도 콘크리트의 휨강도 평가", 한국콘크리트학회논문집, Vol. 20, No. 4, 2008, p.p.531-539 https://doi.org/10.4334/JKCI.2008.20.4.531
  26. Jing-Pil Won, Byung-Tak Hong, Tei-Joon Choi, Su-Jin Lee, and Joo-Won Kang, "Flexrual Behavior of Amorphous Micro-Steel Fiber-Reinforced Cement Composites" Composite Structure, Vol. 94, 2012, p.p.1443-1449 https://doi.org/10.1016/j.compstruct.2011.11.031
  27. 류두열, 민경환, 이진영, 윤영수, "층 구조를 갖는 강섬유 보강 고강도 콘크리트 보의 충격저항성능 향상", 한국콘크리트학회 논문집, Vol. 24, No. 4, 2012, p.p.369-379