Journal of the Korea Institute of Building Construction (한국건축시공학회지)

The Korean Institute of Building Construction (한국건축시공학회)
권호 표지
DOI QR코드

DOI QR Code

Post-Thermal Exposure Bond Strength Properties of CFRP and GFRP in Concrete

콘크리트 고온 가열 이후 CFRP와 GFRP의 부착강도 특성

  • Kim, Ju-Sung (Department of Architectural Engineering, Mokwon University) ;
  • Jeong, Su-Mi (Department of Architectural Engineering, Mokwon University) ;
  • Kim, Young-Jin (Research Center, Korea Concrete Institute) ;
  • Park, Sun-Gyu (Department of Architectural Engineering, Mokwon University)
  • Received : 2023.07.04
  • Accepted : 2023.08.14
  • Published : 2023.10.20
⟨ Previous Next ⟩

Abstract

The surge in FRP(Fiber Reinforced Plastic) research signifies the industry's pursuit to counteract the longstanding issue of rebar corrosion. Notably, Carbon Fiber Reinforced Plastic(CFRP) emerges as a commendable alternative, given its superior resistance to both corrosion and chemical interactions, thus positing itself as a potential replacement for traditional steel rebars. However, the layered composition of fibers and resin in CFRP flags a notable susceptibility to elevated temperatures. Despite its promise, comprehensive studies elucidating the full spectrum of CFRP properties remain ongoing. In this investigative study, we meticulously assessed the bond strength of CFRP post-exposure to high thermal conditions. Our findings underscored a parity in bond strength amongst silica sand-coated CFRP, rib-type CFRP, and Glass Fiber Reinforced Plastic(GFRP).

철근 부식을 해결하기 위해 FRP에 관한 연구가 증가하고 있다. CFRP는 경량화로 시공성이 용이하며, 내식성 및 내화학성이 뛰어나 이형철근 대체제로 지목되고 있다. 하지만 CFRP는 섬유와 레진을 압착하여 만들어져 열에 취약한 단점이 존재한다. 이러한 CFRP에 관한 연구는 미비한 실정이며, 본 연구에서는 고온 가열 이후 CFRP와 GFRP의 부착강도에 관한 연구를 실시하였다. 그 결과 규사코팅 CFRP와 리브형 CFRP, GFRP 모두 비슷한 부착강도 발현을 보였다.

Keywords

Acknowledgement

This work is supported by the Korea Agency for Infrastructure Technology Advancement(KAIA) grant funded by the Ministry of Land, Infrastructure and Transport(RS-2021-KA163381).

References

  1. Kim CS, Seo DW, Shin SW, Ahn JM, Han BS. Effect of concrete strength on concrete beams reinforced with FRP bar. Celebrating the 60th anniversary of the founding of the Architectural Institute of Korea 2005 Oct 24-25; Seoul, Korea. Seoul (Korea): Architectural Institute of korea; 2005. p. 24-5.
  2. Kim TY, Park JS, Lee JY, Kim KH. Effect of compressive strength of concrete on the bond strength of glass fiber reinforcement plastic bars. Journal of the Architectural Institute of Korea. 2005 Dec;21(12):69-76.
  3. Lee YH, Choi JH, Kim HC, Kim DH, La SJ. Experimental study on bond strength of CFRP rebar in concrete. Journal of the Architectural Institute of Korea. 2008 Nov;24(11):53-60.
  4. Kim HH, Jang SM, Noh SY. Crack behavior of reinforced concrete tension member under steel corrosion. Journal of the Architectural. 2007 Oct;23(9):99-106.
  5. Okelo R, Yuan RL. Bond strength of fiber reinforced polymer rebars in normal strength concrete. Journal of composites for construction. 2005 Jun;9(3):203-13. https://doi.org/10.1061/(ASCE)1090-0268(2005)9:3(203)
  6. Nanni A, De luca A, Zadeh HJ. Reinforced concrete with FRP bars - Mechanics and design. FL: CRS Press; 2014. p. 35-63.
  7. Benmokrane B, Wang P, Ton-That TM, Rahman H, Robert JF. Durability of glass fiber reinforced polymer reinforcing bars in concrete environment. Journal of composites for Construction. 2002 Jul;6(3):143-55. https://doi.org/10.1061/(ASCE)1090-0268(2002)6:3(143)
  8. Baena M, Torres L, Turon A, Barris C. Experimental study of bond behaviour between concrete and FRP bars using a pull-out test. Composites Part B: Engineering. 2009 Dec;40(8):784-97. https://doi.org/10.1016/j.compositesb.2009.07.003
  9. Kim MK, Shin IG, Kim SJ, Park DK, Seo JK. Torsional strength of CFRP material for application of ship shaft system. Journal of the Society of Naval Architects of Korea. 2021 Dec;58(6):431-9. https://doi.org/10.3744/SNAK.2021.58.6.431
  10. Oh HS, Moon DY. A degradation characteristic of FRP rebars attacked by combined environmental factors. Journal of the Korea Institute for Structural Maintenance and Inspection. 2012 May;16(3):1-10. https://doi.org/10.11112/jksmi.2012.16.3.001
  11. Katz A, Berman N Bank LC. Effect of high temperature on the bond strength of FRP rebar. Journal of Composites for Construction. 1999 May;3(2):73-81. https://doi.org/10.1061/(ASCE)1090-0268(1999)3:2(73)
  12. Nigro E, Bilotta A, Cefarelli G, Manfrdi G, Cosenza E. Performance under fire situations of concrete members reinforced with FRP rods: Bond models and design nomograms. Journal of Composites for Construction. 2012 Dec;16(4):395-406. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000279
  13. Kim SS, Lee JB, Kim IK, Song JJ. A study on the highest exposure temperatures of exposed reinforced concrete structures at fire. Journal of the Korea Institute for Structural Maintenance and Inspection. 2013 Mar;17(2):94-100. https://doi.org/10.11112/jksmi.2013.17.2.094
  14. CSA S806-12. Design and Construction of Building Structures with Fibere-Reinforced Polymers. Mississauga (Canada): Canadian Standards Association. 2017. 111 p.
  15. KS F 2403. Standard test method for making and curing concrete specimens. Seoul (Korea): Korean Agency for Technology and Standards; 2014. 14 p.