Effect of elevated service temperature on bond between FRP EBR systems and concrete |
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| Authors: | Marianovella Leone Stijn Matthys Maria Antonietta Aiello |
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| Affiliation: | 1. Department of Engineering for Innovation, University of Salento, Via per Arnesano, 73100 Lecce, Italy;2. Magnel Laboratory for Concrete Research, Department of Structural Engineering, Ghent University, Technologiepark-Zwijnaarde 904, B-9052 Gent, Belgium;1. Isfahan University of Technology (IUT), Isfahan, Iran;2. Swiss Federal Laboratories for Materials Science and Technology (Empa), Überlandstrasse 129, Dübendorf, 8600, Switzerland;3. University of Tehran, Tehran, Iran;1. Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast Univ., Nanjing, China;2. Department of Civil and Architectural Engineering, City Univ. of Hong Kong, Hong Kong, China;1. Civil, Arch. and Envir. Engr., Missouri University of Science and Technology, 1304 Pine Street, 201 Pine Building, Rolla, MO 65409, USA;2. Department of Civil Engineering, College of Engineering, Al-Nahrain University, Al-Jadriya, Baghdad 10072, Iraq;3. Civil, Arch. and Envir. Engr., Missouri University of Science and Technology, 305 McNutt Hall, 1400 N. Bishop Ave., Rolla, MO 65409, USA;4. Mechanical and Aerospace Engr., Missouri University of Science and Technology, 188 Toomey Hall, Rolla, MO 65409, USA;1. ISISE, University of Minho, Department of Civil Engineering, Guimarães, Portugal;2. INEGI, University of Porto, Faculty of Engineering, Porto, Portugal;3. CITAB, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal |
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| Abstract: | The method to increase the ultimate capacity of reinforced concrete elements, by means of Fiber Reinforced Polymers bonded on their substrate with thermosetting resins, represents a technique useable worldwide. The bonding materials used, generally epoxy resins, are sensitive to a temperature increase. In fact, the curing process of epoxies leads to low glass transition temperature (Tg) values, that may cause a relevant decay of the mechanical properties of the adhesive, even under service thermal conditions. The reduction can influence the bond performance, compromising the effectiveness of the reinforcing technique. In this work the interface behaviour FRP–concrete at elevated service temperatures is analyzed. The experimental results show a relevant influence of the temperature on bond performance, in terms of type of failure of the interface, effective bond length and bond strength. |
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