Effect of aging on bond of GFRP bars embedded in concrete |
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| Authors: | Mathieu Robert Brahim Benmokrane |
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| Affiliation: | 1. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;2. Department of Civil Engineering, Monash University, Clayton, VIC 3800, Australia;3. International Institute for Urban Systems Engineering, Southeast University, Nanjing 210096, China;4. Department of Mechanical and Aerospace Engineering, Monash University, Clayton, VIC 3800, Australia;5. Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia;1. Department of Architecture, Built Environment and Construction Engineering, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy;2. Fachgebiet Massivbau und Baukonstruktion, Technische Universität Kaiserslautern, Paul-Ehrlich-Straße, D-67663 Kaiserslautern, Germany;1. Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, Southeast University, Nanjing 210096, China;2. Guangxi Construction Engineering Group Corporation Limited, Nanning 530200, China |
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| Abstract: | This paper presents an experimental investigation of the durability of the bond between GFRP bars and concrete, specifically as it relates to degradation of the GFRP-bar surface and behavior of the bar–concrete interface. The GFRP bars were embedded in concrete and exposed to tap water at 23 °C, 40 °C, and 50 °C to accelerate potential degradation. The bond strengths before and after exposure were considered as a measure of the durability of the bond between the GFRP bars and concrete. In addition, Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM) were used to characterize how bar aging affected the bond between the GFRP bars and the concrete. The results showed that aging did not significantly affect the durability of the bar–concrete interface under the conditions used in this study. |
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