KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지
DOI QR코드

DOI QR Code

Long-Term Degradation Mechanism of GFRP Dowel Bar for Jointed Concrete Pavement under Repeated Freezing-Thawing

동결융해 반복을 받는 콘크리트 포장용 GFRP 다웰바의 장기성능저하 메커니즘

  • 원종필 (건국대학교 사회환경시스템공학과) ;
  • 장창일 (건국대학교 대학원 사회환경시스템공학과) ;
  • 박찬기 (공주대학교 지역건설공학전공) ;
  • 이상우 (건국대학교 대학원 사회환경시스템공학과)
  • Received : 2007.08.07
  • Accepted : 2008.03.07
  • Published : 2008.05.31
Download PDF
⟨ Previous Next ⟩

Abstract

This study carried out the repeated freezing-thawing test in order to understand the long-term degradation mechanism of GFRP dowel bars. The mechanical property measured by shear test. In addition, analyzes repeated freezing-thawing degradation mechanism of GFRP dowel bars by observe the microstructure through Scanning Electron Microscope (SEM) and Gas Physisorption techniques. As the result of test, it was found that the mechanical property didn't decreased as the exposure time to water and repeated freezing-thawing environment. It shows clearly observed microstructure investigations.

GFRP 다웰바의 장기 내구성능 저하 메커니즘을 규명하기 위하여 실제 콘크리트 포장에서 발생할 수 있는 수분환경과 동결융해반복 환경하의 촉진 내구성능 평가를 실시하였으며 그에 따른 미세구조 분석을 통해 성능저하 열화 진행 메커니즘을 분석하였다. GFRP 다웰바의 내구특성 평가는 촉진환경에 노출 후 전단시험을 실시하여 분석하였으며 미세구조 분석을 위하여 SEM 사진과 가스흡착에 의한 공극측정을 실시하였다. 실험결과 수분환경 및 동결 융해반복 환경에 노출된 GFRP 다웰바는 내구특성 저하가 거의 나타나지 않았다. 이와 같은 결과는 미세구조분석에서 명확히 관찰 할 수 있었다.

Keywords

References

  1. 원종필, 조용진, 심종성, 심재원(2005) 유리섬유강화 합성 다웰바의 물리.역학적 특성, 대한토목학회 논문집, 대한토목학회, 제25권 5호, pp. 671-678
  2. Anonymous (1999) Nocorrosive Dowel Bars to Be Evaluated, Civil Engineering, Vol. 69, No. 9, pp. 26
  3. American Standard for Test and Materials, ASTM D 4475-02 (2000) Standard Test Method for Apparent Horizontal Shear Strength of Pultuded Reinforced Plastic Rods by the Shortbeam Method, Annual Book of ASTM Standard
  4. Benmokrane, B., Zhang, B., Laoubi, K., Tighiouart, B., and Lord, I. (2001) Mechanicla and Bond Properties of New Generation of Isorod CFRP Reinforceing Bars for Concrete Structures, Department of Civil Engineering, Faculty of Engineering, University of Sherbrooke, Sherbrooke, Qubec, Canada
  5. Bank, L.C. and Puterman, M. (1997) Microscopic study of surface degradation of glass fiber-reinforced polymer rods embedded in concrete castings subjected to environmental conditioning, High Temperature and Environmental Effects on Polymeric Composites: 2nd Volume, ASTM STP 1302, T. S. Gates and A.-H. Zureick, Eds., American Society for Testing and Materials, West Conshohocken, PA., pp. 191-205
  6. Chin, J.W., Aouadi K., and Nguyen, T. (1997) Effects of environmental exposure on fiber-reinforced plastic (FRP) materials used in construction, Journal of Composites and Technology Research, Vol. 19, No. 4, pp. 205-213 https://doi.org/10.1520/CTR10120J
  7. Curtis, D. and Rhaub, W. (2001) Evaluation of the Fiber dowel Corrosion Proof dowel bar System as a Load Transfer Device, MR 96-03, North Dakota Department of Transportation Materials and Research Division
  8. Dutta, P.K. and Hui, D. (1995) Low-temperature and freeze-thaw durability of thick composites, Composites Engineering, No. 27, pp. 371-380
  9. Highway Innovative Technology Evaluation Center (HITEC) (1998) HITEC Evaluation Plan for Fiber Reinforced Polymer Composite Dowel Bars and Stainless Dowel Bars
  10. Karbhari, V.M., Zhao L., Murphy K., and Kabalnova, L. (1998) Environmental Durability of Glass Fiber Reinforced Composites Short Term Effects, Proc. 1st Conference on Durability of FRP Composites for Construction (CDCC'98), Sherbrooke (Canada), pp. 513-524, August 5-7th
  11. Karbhari, V.M., Chin, H.W., Hunston, D., Benmokrane, B., Juska, T., Morgan, R., Lesko, J.J., Sorathia, U., and Reynaud, D. (2003) Durability gap anlaysis for fiber reinforced polyner composites in civil infrastructure, Journal of Composites for Construction, Vol. 7, No. 3, pp. 21-27, pp. 238-247
  12. Litherland, K.L., Oakley, D.R., and Protor, B.A. (1981) The use of accelerated aging procedures to prodict the long term strength of GRC composites, Cement and Composite Research, Vol. 11, pp. 455-466
  13. Lorenz, E.A. (1993) Accelerated Aging of Fiber Composite Bars and Dowels, Master Thesis, Iowa State University
  14. Machida, A. (1993) State-of-the-Art Report on Continous Fiber Reinfocing Materials, Japan Society of Civil Engineers(JSCE), Tokyo, Japan
  15. Nina MaLawhorn (2003) Alternative dowel bar material for concrete pavement joints, Wisconsin Department of Transportation, Transpotation Synthesis Report, Wisconsin Department of Transportation, Transpotation RD&T Program
  16. Saad A. Abo-Qudais and Imad L. Al-Qadi (2000) Dowel bars corrosion in concrete pavement, Canadian Journal of Civil Engineering, Vol. 27, pp. 1240-1247 https://doi.org/10.1139/cjce-27-6-1240
  17. Vijay, P.V. (1999) Aging and Design of Concrete Members Reinforced with GFRP Bars, Ph.D thesis, Department of Civil Engineering, West Virginia University, Morgantown, West Virginia, USA