Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
권호 표지
DOI QR코드

DOI QR Code

Experimental Study on Flexural Capacity of Precast Steel Mesh Reinforced Mortar Panel

프리캐스트 스틸메쉬 보강 모르타르 패널의 휨 성능에 대한 실험적 연구

  • 이나현 (연세대학교 토목공학과) ;
  • 김장호 (연세대학교 사회환경시스템공학부) ;
  • 이상원 (연세대학교 토목공학과) ;
  • 김태균 (연세대학교 토목공학과)
  • Received : 2012.09.19
  • Accepted : 2013.03.11
  • Published : 2013.05.30
Download PDF
⟨ Previous Next ⟩

Abstract

Recently, researches related to precast modular construction have been actively conducted for nuclear power plant, LNG gas tank, and small-medium PCCV as well as bridges and buildings. In this study, the precast panel cast with steel mesh reinforced mortar (SRM) which is similar reinforced ferrocement was developed for efficient precast construction, construction time reduction, and easy transportation. Mortar mixture with high strength and flowability was obtained from various case studies using silica fume and GGBS. Also, $1,200{\times}600{\times}150mm$ SRM and reinforced concrete (RC) panels were manufactured with reinforcing ratio of 2% and 4%. To verify structural performance of the SRM specimen, the basic material tests, free shrinkage test, and 3-point flexural test with a line loading were carried out. From the test results, it was determined that SRM specimens showed outstanding flexural capacity and ductility. However, the 4% reinforced SRM specimens must consider shear reinforcing to be used as a precast modular member.

최근, 프리캐스트를 통한 모듈화에 대한 관심으로 인해 교량 및 빌딩 뿐만 아니라, 원전구조물, LNG 가스탱크, 중소형 강합성 구조물 등 특수구조물에도 프리캐스트 모듈화에 대한 연구가 활발하게 이뤄지고 있다. 본 연구에서는 프리캐스트 제작의 시공 및 작업성, 원활한 자재의 조달할 수 있는 방법으로 페로시멘트 (ferrocement)를 바탕으로 한 스틸메쉬로 보강된 모르타르 프리캐스트 패널을 제작하였다. 모르타르는 고강도 및 고유동성을 지니도록 실리카퓸과 고로슬래그의 배합율에 대한 변수연구를 통해 최적의 배합을 선정하였으며, $1,200{\times}600{\times}150mm$의 패널을 제작하여 스틸메쉬로 보강한 모르타르 시편과 일반 철근콘크리트 시편을 보강비 2%와 4%로 각각 제작하였다. 제작된 스틸메쉬로 보강한 모르타르의 프리캐스트 모듈화의 적용 가능성을 판단하기 위하여 기본적인 재료물성실험과 자유건조수축실험을 수행하였으며, 선하중으로 하중을 재하하여 3점 휨 시험으로 스틸메쉬로 보강한 모르타르의 구조성능을 검토하였다. 실험결과를 통해, 스틸메쉬로 보강된 모르타르 프리캐스트 패널은 높은 휨성능 및 연성효과가 있으나, 4%로 보강된 스틸메쉬 모르타르 프리캐스트 패널은 전단보강에 대한 고려가 필요하다고 판단되며, 이에 대한 조치가 이루어진다면 프리캐스트 모듈화 부재로 적용이 가능하다고 판단된다.

Keywords

References

  1. ACI Committee 549-1R, State-of-the-Art Report on Ferrocement, Manual of Concrete Practice, American Concrete Institute, Farmington Hills, Michigan. 1997, pp.1-30.
  2. ACI Committee 549-2R, Report on Thin Reinforced Cementitious Products, American Concrete Institute, Farmington Hills, Michigan. 2004, pp.1-28.
  3. Al-Rifai, W. N., "Ferrocement Wall: Penetration Testing", Proceedings of Eight International Symposium and Workshop on Ferrocement and Thin Reinforced cement Composites, Bangkok, Thailand, 2006, pp.177-185.
  4. David, G. H., Jonathan, M. W., Marc, O. E. and John, F. S., State-of-the-art report on precast concrete systems for rapid construction of bridges, US department of transportation Federal Highway Administration, Final technical report, Task 53, 2005, pp.1-85.
  5. Eswaranmoorthi, P. and Subramanian, K., "Impact resistance of fibrous ferrocement slabs", Proceedings of Eight International Symposium and Workshop on Ferrocement and Thin Reinforced cement Composites, Bangkok, Thailand, 2006, pp.133-140.
  6. Greepala, V. and Nimityongskul, P., "Structural integrity of ferrocement panels exposed to fire", Cement and Concrete Composites, vol. 30, No. 5, 2008, pp.419-430. https://doi.org/10.1016/j.cemconcomp.2007.08.007
  7. Ichinami, K., Okajima, S., Nishinomuya, G. and Takagi, H., "Design and construction of DUALPC wall-Sakaide LNG terminal, 180,000kl PC LNG tank", 3rd fib congress 2010, National report, Washington D.C., USA, pp.193-196.
  8. Kim, M. S., "Forcast of international construction market and strategies for diversification after the Dubai debacle", Construction Economy, Korea Research Institute For Human Settlements, vol. 61, 2009, pp.65-74. (in Korean)
  9. Kim, S. B., Kim, H. Y., Yi, N. H. and Kim, J. H. J., "Strength and crack resistance properties of fiber reinforced concrete mixed with recycled PET fiber", Journal of the Korea Institute for Structural Maintenance and Inspection, vol. 14, No. 1, 2010, pp.102-108. (in Korean)
  10. Kim, Y. B., "Ferrocement", Journal of the Korea Concrete Institute, Korea Concrete Institute, vol. 2, No. 1, 1990, pp.39-42. (in Korean)
  11. Kurosky, J., Hughes, B., Zalok, E., Halim, A. O. A. E. and Tolba, A., "On ameliorating the residual strength of reinforced concrete panels subjected to elevated temperature", Construction and Building Materials, vol. 27, No. 1, 2010, pp.623-629.
  12. Miguel, A. P. L. H., Physical and numerical experimentation of fiber reinforced concrete and ferrorcement elements, Dissertation doctor of philosophy, University of California Davis, 2001, pp.1-118.
  13. Naaman, A. E., Ferrocement and laminated cementitious composites, Ann Arbor, Michigan, 2000, pp.58-132.
  14. Neville, A. M., Properties of concrete, 4th ed. John Wiley & Sons, 1996, New York, pp.412-481.
  15. Nilson, H., Darwin, D. and Dolan, C. W., Design of Concrete Structures 14th ed., 2010, McGraw-Hill, New York, pp.49-52.
  16. Paul, B. K. and Pama, R. P., "Ferrocement", International Ferrocement Information Center, Asian Institute of Technology, Bangkok, 1978, pp.23-130.
  17. Salimuddin, R. S. and Mahyuddin, R., "Development of lightweight ferrocement sandwich panels for modular housing and industrialized building system", University Technology Malaysia, No. 73311, 2008, pp.20-93.
  18. Sohn, T. H., "A study on associations among number of bidders, contract award rate and profitability on international construction", Journal of the Korea Society of Civil Engineers, Korea Society of Civil Engineers, vol. 31, No. 2D, 2011, pp.247-253. (in Korean)
  19. Stanley, A., Ferrocement: Building with Cement, Sand, and Wire Mesh, Hill family, Minnesota, 2008, pp.15-90.
  20. Suh, K. S., Ferrocement mechanics, Cheong Moon Gak, Seoul, 2003, pp.3-85. (in Korean)
  21. Yang, K. H., Hwang, H. J., Kim, S. Y. and Song, J. G., "The Behavior of shrinkage strain and compressive strength of the cementless mortar using Hwangto binder according to mixing conditions", Journal of the Architectural Institute of Korea, Architectural Institute of Korea, vol. 22, No. 6, 2006, pp.87-94. (in Korean)