Research on the Bonding Performance of the CFRP-Concrete Interface Based on Colloid Thermosensitivity
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 5
Abstract
The bonding performance of carbon fiber–reinforced polymer (CFRP)–concrete interface is an important research area, with adhesives serving as mediators for the transfer of interface stresses. However, there is significant variation in the mechanical properties of adhesives available in the market, and currently there is limited research on the patterns of how adhesive mechanical properties affect interfaces. First, dynamic thermomechanical analysis was used to investigate the glass transition temperature of the adhesive, . Following this, tensile tests were conducted to assess the mechanical properties of the adhesive at various temperatures. Finally, the effects of the adhesive on the interface bonding properties of CFRP-concrete were studied by single shear tests at different ambient temperatures. The test results indicated that when the ambient temperature is lower than the glass transition temperature (), as the temperature increases, although the mechanical properties of the adhesive decreased, the effective bonded length of interface increased significantly, leading to a gradual increase in interface load-bearing capacity. Furthermore, the interface constitutive model was modified by finite-element model inversion. The modified parameters and exhibited a linear increase relationship with the elastic modulus of the adhesive, and the modified parameter showed a negative exponential power function relationship with the elastic modulus of the adhesive.
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Data Availability Statement
All data that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant No. 51878238).
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Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 5 • May 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Aug 12, 2023
Accepted: Nov 6, 2023
Published online: Feb 26, 2024
Published in print: May 1, 2024
Discussion open until: Jul 26, 2024
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