콘크리트학회논문집 (Journal of the Korea Concrete Institute)

  • 제19권2호
  • /
  • Pages.233-239
  • /
  • 2007
  • /
  • 1229-5515(pISSN)
  • /
  • 2234-2842(eISSN)
한국콘크리트학회 (Korea Concrete Institute)
권호 표지
DOI QR코드

DOI QR Code

재생 PET 섬유의 형상 및 길이가 시멘트 복합 재료의 소성 수축 균열에 미치는 영향

Effect of Recycled PET Fiber Geometry and Length on the Plastic Shrinkage Cracking of Cement Based Composites

  • 원종필 (건국대학교 사회환경시스템공학과) ;
  • 박찬기 (건국대학교 사회환경시스템공학과) ;
  • 김황희 (건국대학교 사회환경시스템공학과) ;
  • 이상우 (건국대학교 사회환경시스템공학과)
  • Won, Jong-Pil (Dept. of Civil & Environmental System Engineering, Konkuk University) ;
  • Park, Chan-Gi (Dept. of Civil & Environmental System Engineering, Konkuk University) ;
  • Kim, Hwang-Hee (Dept. of Civil & Environmental System Engineering, Konkuk University) ;
  • Lee, Sang-Woo (Dept. of Civil & Environmental System Engineering, Konkuk University)
  • 발행 : 2007.04.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

본 연구의 주요 목적은 시멘트 복합 재료의 소성 수축 균열 제어에 폐 PET병으로부터 만들어진 재생 PET 섬유의 효과를 평가하는 것이다. PET은 플라스틱 재료라 알려진 재료로 음료수 병 등에 다양하게 적용되어 왔다. 그렇지만 폐 PET 병은 사용 후에 환경적 측면에서 큰 문제점으로 부각되고 있다. 따라서 폐 PET 병을 재활용하는 방법에 대한 연구는 환경 및 경제적 측면에서 중요하게 되었다. 폐 PET 병을 재활용하는 방법 중 시멘트 복합 재료의 보강 섬유로 사용하는 방법은 효과적인 방법 중에 하나이다. 본 연구에서는 시멘트 복합 재료의 소성 수축 균열에 재생 PET 섬유의 형상 및 길이의 효과를 얇은 슬래브 실험을 통해서 조사하였다. 실험 계획은 섬유의 형상, 길이 및 혼입률의 영향을 이해하기 위하여 수행하였다. 재생 PET섬유의 형상은 straight, crimped및 embossed type의 3가지 형상을 포함하며, 각 3가지 섬유형상 마다 3가지 수준의 섬유 혼입률 및 2가지 종류의 섬유 길이에 대해서 조사하였다. 실험 결과 재생 PET섬유는 시멘트 복합 재료의 소성 수축 균열에 효과적이었다. 섬유의 길이의 관점에서 길이가 긴 섬유는 섬유의 형상이 동일할 때 섬유체적비가 적을 때 효과적이며, 섬유체적비가 증가하면 길이가 짧은 섬유가 더욱더 효과적이었다. 또한 embossed type의 섬유는 적은 섬유 혼입률에서 다른 형상의 섬유보다 소성 수축 균열 제어 효과가 우수하였으며, 높은 섬유 혼입률에서는 straight type의 섬유가 다른 형상의 섬유보다 시멘트 복합 재료의 소성 수축 균열 제어에 가장 효과적이었다.

The main objective of this study was to evaluate the effect of recycled PET fiber made from waste PET bottle on the control of plastic shrinkage cracking of cement based composites. PET is blown as a plastic material and used in a variety products such as a beverage bottle. However, waste PET bottles are thrown after the usage, raising huge problems in terms of the environment. Thus, the research on the method to recycle the PET bottles indicates important aspects in environment and economy. The method to recycle waste PET bottles as a reinforcing fiber for cement based composites is one of effective methods in terms of the recycle of waste PET bottles. In this research, the effect of recycled PET fiber geometry and length on the control of plastic shrinkage was examined through thin slab tests. A test program was carried out to understand the influence of fiber geometry, length and fiber volume fraction. Three type of recycled PET fibers including straight, twist crimped and embossed type. Three volume fraction and two fiber length were investigated for each of the three fiber geometry. Test results indicated that recycled PET fibers are effective in controlling plastic shrinkage cracking in cement based composites. In respect to effect of length of fiber, longer fiber was observed to have efficient cracking controlling with low volume fraction in same fiber geometry while shorter fiber controled plastic shrinkage cracking efficiently as addition rate increase. Also, embossed type fibers were more effective in controlling plastic shrinkage cracking than other geometry fiber at low volume fraction. But, for high volume fraction, straight type fibers were most effective in plastic shrinkage cracking controlling in cement based composites.

키워드

참고문헌

  1. Naaman, A E., New Fiber Technology, Concrete International, USA, Vol.20, No.7, 1998, pp,57-62
  2. Wang, K., Surendra, P, Shah, and Pariya Puaksuk, 'Plastic Shrinkage Cracking in Concrete Materials Influence of Fly Ash and Fibers', ACI Materials Journal, Vol.98, No.49, 2001, pp.458-464
  3. Balaguru, P. N. and Shah, S, P., Fiber Reinforced Cement Composites, McGraw-Hill Intemaltional Editions, 1992, pp.1-22
  4. Bentur, A. and Mindess, S., Fibre Reinforced Cementitious Composites, Elsevier Applied Science, London, 1990, pp.1-11
  5. Balaguru, P., 'Contribution of Fibers to Crack Reduction of Cement Composites the Initial and Final Setting Period', ACI Materials Journal, Vol.91, M27, 1994, pp.280-288
  6. S. Mindess, J. and Francis, D, Darwin, Concree, 2nd edition, Pentis Hall, NJ, USA, 2003, pp.1-8
  7. Qi, C., Weiss, W. J., and Olek, J., 'Characterization of PIastic Shrinkage Cracking in Fiber Reinforced Concrete Using Semi-Automate Image Analysis', Concrete Science and Engineering, Vol.36, No.260, 2003, pp.386-395
  8. Najm, H. and Balaguru, P., 'Effect of Large-Diameter Polymeric Fibers on Shrinkage Cracking of Cement Composites', ACI Materials Journal, Vol.99, No.4, 2002. pp.345-351
  9. Naaman, A. E., Xia, Z., Hikasa, J.I., and Saito, T., 'Control of Plastic Shrinkage Cracking of Concrete with PYA Fibers', Proceedings of International Symposium on Infrastructure Regeneration and Rehabilitation, University of Sheffield, UK, June 28-July 2, 1999, pp.371-385
  10. Grzybowshi, M. and Shah, S.P., 'Shrinkage Cracking of Fiber Reinforced Concrete', ACI Materials Journal, Vol.87, M16, 1991, pp,138-148
  11. Banthia, N, and Yan, C., 'Shrinkage Cracking in Polyolefin Fiber Reinforced Concrete', ACI Materials Journal, Vol.97, No.4, 2000, pp.432-437
  12. Banthia, N., Yan, C., and Mindess, S., 'Restrained Shrinkage Cracking in Fiber Reinforced Concrete: A Novel Test Technique', Cement and Concrete Research, Vol.26, No.1, 1996, pp,9-15 https://doi.org/10.1016/0008-8846(95)00186-7
  13. Choi, Y. W., Moon, D. J., Chung, J. S., and Chod, S. K., 'Effects of Waste PET Bottles Aggregate on the Properties of Concrete', Cement and Concrete Research, No.35, 1985, pp.776-781 https://doi.org/10.1016/j.cemconres.2004.05.014
  14. Kraai, Paul P., 'A Proposed Test to Determine the Cracking Potential due to Drying Shrinkage of Cracking', Concrete Construction, Vol.30, No.9, 1985, pp.775-778,
  15. Carlson, R. and Reading, T. J., 'Model of Studying Shrinkage Cracking in Concrete Building Walls', ACI Structural Journal, Vol.85, No.4, 1988, pp.395-404
  16. 원종필, 박찬기, '폴리프로필렌 섬유 보강 콘크리트의 소성수축균열 및 내구 특성', 대한토목학회논문집, 15권 5호, 1990, pp.783-790
  17. Banthia, N. and Gupta, R., 'Influence of Polypropylene Fiber Geometry on Plastic Shrinkage Cracking in Concrete', Cement and Concrete Research, No.36, pp.1263-1267

피인용 문헌

  1. Fire Resistance Performance of Recycling PET Fiber Reinforced High Strength Concrete Circular Column vol.16, pp.6, 2016, https://doi.org/10.5345/JKIBC.2016.16.6.513