Influence of curing, post-curing and testing temperatures on mechanical properties of a structural adhesive
| Autor: | Younes Jahani, Marta Baena, Cristina Barris, Ricardo Perera, Lluís Torres |
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| Přispěvatelé: | Agencia Estatal de Investigación |
| Rok vydání: | 2022 |
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| Zdroj: | Construction and Building Materials, 2022, vol. 324, art.núm.126698 Articles publicats (D-EMCI) Jahani, Younes Baena Muñoz, Marta Barris Peña, Cristina Perera, Ricardo Torres Llinàs, Lluís 2022 Influence of curing, post-curing and testing temperatures on mechanical properties of a structural adhesive Construction and Building Materials 324 art.núm.126698 DUGiDocs – Universitat de Girona Universidad de Alicante (UA) |
| Popis: | Structural cold-curing adhesives are widely used to strengthen Reinforced Concrete (RC) structures with Fibre Reinforced Polymers (FRPs). The performance of these adhesives, and therefore the performance of the strengthening system, may be affected by temperature, as ambient-cured structural adhesives usually have low glass transition temperature (Tg). This paper presents a comprehensive experimental investigation on the influence of temperature on mechanical properties and Tg of a structural epoxy adhesive. The experimental program was divided in four groups of specimens. In Group 1, the effect of curing and post-curing temperature on Tg of the epoxy adhesive was investigated. In Groups 2-4, the effects of testing temperature, curing temperature and post-curing temperature, respectively, on adhesive mechanical properties were studied. Experimental results confirm that curing and post-curing temperature affected Tg differently depending whether the applied temperature was below or beyond the epoxy Tg. Similar behavior was observed in the mechanical properties of the epoxy, as they showed improvements when curing process (curing and post-curing) temperature was below Tg and they were negatively affected when curing process temperature was beyond Tg. Besides, tensile and compressive mechanical properties were negatively affected by testing temperatures beyond 20 ◦C This research was supported by the Spanish Ministry of Economy and Competitiveness (MINECO/AEI/FEDER, UE) under projects BIA2017- 84975-C2-2-P and BIA2017-84975-C2-1-P and the Generalitat de Catalunya (grant number 2019FI_B 00054] Open Access funding provided thanks to the CRUE-CSIC agreement with Elsevier |
| Databáze: | OpenAIRE |
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