Pull-off testing as an interfacial bond strength assessment of CFRP-concrete interface exposed to a marine environment
Source abstract
Abstract
Abstract The long-term performance of the bond between carbon fibre reinforced polymer composite (CFRP) fabrics and concrete substrate is crucial to estimations of the reliability of externally strengthened concrete structures. This paper presents the experimental results and analysis of 162 pull-off tests using nine concrete slabs under various environmental conditions, i.e., wet/dry cyclic exposure and full-immersion exposure of 3.5% salt-water at a temperature of 60 °C. The main objective of this study was to assess the effects on the bond performance of CFRP-strengthened concrete slabs during 12 months of exposure in a marine environment. Five types of failure modes were observed in the tested samples. The test results confirmed that 12 months of exposure in a marine environment had a low effect on the epoxy performance between CFRP and concrete. The results also indicated the marginal increase of pull-off strength values after 12 months of environmental exposure.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Structural Behavior of Reinforced Concrete · Innovative concrete reinforcement materials · Concrete Corrosion and Durability
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (20)
Show source-provided references
1. Fazli · 2016 · 63
2. Bond behavior between fiber-reinforced polymer laminates and concrete
3. Dai J, Ueda T. Local bond stress slip relations for FRP sheets-concrete interfaces. in: Proceedings of fiber-reinforced polymer reinforcement for concrete structures (FRPRCS-6). Singapore, July. p. 8-10; 2003.10.1142/9789812704863_0011 ↗
4. Issues related to composite plating and environmental exposure effects on composite-concrete interface in external strengthening10.1016/S0263-8223(98)00031-2 ↗
5. ACI 440.2R-08. Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures. 2008.
6. Maerz N, Galecki G, Nanni A. Experimental nondestructive testing of FRP materials, installation, and performance, Dallas county bridge, Missouri, USA. In: Proceedings of the 16th world conference on nondestructive testing (WCNDT). Canada, August; 2004.
7. Investigation of durability and surface preparation associated defect criticality of composites bonded to concrete10.1016/j.compositesa.2008.03.003 ↗
8. Myers J, Ekenel M. Effect of environmental conditions on bond strength between CFRP laminate and concrete substrate. In: ACI SP-230, In: Proceedings of the 7th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures. p. 1571–1592; 2005.
9. Behavior of FRP-confined concrete after high temperature exposure10.1016/j.conbuildmat.2010.06.103 ↗
10. BS 1881 part 207. British standards institution, recommendations for the assessment of concrete strength by near-to-surface tests. 1992.
11. ASTM D7522. Standard test method for pull-off strength for frp bonded to concrete substrate. 2009.
12. ASTM D4541-09. Standard test method for pull-off strength of coating using portable adhesion testers. West Conshohocken, PA,, 2009.
13. Comparative durability evaluation of ambient temperature cured externally bonded CFRP and GFRP composite systems for repair of bridges10.1016/j.compositesa.2009.01.011 ↗
14. Water degrading effects on the bond behavior in FRP-strengthened masonry10.1016/j.compositesb.2013.04.074 ↗
15. Environmental Effects on Epoxy Adhesives Employed for Restoration of Historical Buildings10.1061/(ASCE)0899-1561(2006)18:5(715) ↗
16. Hygrothermal effects of epoxy resin. Part II: variations of glass transition temperature10.1016/S0032-3861(98)00791-5 ↗
17. Bond characterization between concrete substrate and repairing SFRC using pull-off testing10.1016/j.ijadhadh.2005.01.002 ↗
18. Backscattered electron imaging of cement pastes cured at elevated temperatures10.1016/0008-8846(95)00051-D ↗
19. Effect of hot temperature on pull-off strength of FRP bonded concrete10.1016/j.conbuildmat.2015.05.013 ↗
20. Experimental research on concrete strength prediction by Limpet pull-off test in China