Durability of CFRP-concrete bond in EBR and NSM systems under natural ageing for a period of three years
| Autor: | Dushimimana, Aloys, Correia, Luís, Cruz, Ricardo, Pereira, João Miguel, Sena-Cruz, José |
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| Přispěvatelé: | Universidade do Minho |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Epoxy adhesive
Cidades e comunidades sustentáveis EBR bond Reinforced concrete strengthening with CFRP tensile strength Engenharia e Tecnologia::Engenharia dos Materiais natural outdoor ageing Engenharia e Tecnologia::Engenharia Civil Ação climática CFRP-concrete bond durability NSM Produção e consumo sustentáveis CFRP laminate |
| Popis: | This work aims at assessing the durability of the CFRP-concrete bond exposed to different outdoor ageing environments for a period of three years. Carbon Fibre Reinforced Polymer (CFRP) composites have been shown to possess desirable properties for strengthening of reinforced concrete (RC) structures. The application of CFRP composites is mainly through Externally Bonded Reinforcement (EBR) or Near Surface-Mounted (NSM) techniques. The main objective of the present work was to provide insights on durability of bond between concrete and CFRP strips installed according to EBR and NSM techniques under the effects of ageing induced by outdoor conditions for a period of three years. Specimens were placed in four different outdoor environments (E3-E6) with ageing mainly induced by freeze-thaw attacks, carbonation, airborne chlorides, and elevated temperatures. Besides, the study included a reference environment (E1: ≈20 C / 55% RH) and another environment (E2: ≈20 C / water immersion). The bond test results for the specimens collected from the aforementioned outdoor environments showed a low degradation of the CFRP-concrete bond after three years. This work was carried out in scope of the project FRPLongDur POCI-01-0145-FEDER-016900 (FCT PTDC/ECM-EST/1282/2014) and Durable-FRP (PTDC/ECI-EGC/4609/2020) funded by national funds through the Foundation for Science and Technology (FCT) and co-financed by the European Fund of the Regional Development (FEDER) through the Operational Program for Competitiveness and Internationalization (POCI) and the Lisbon Regional Operational Program. This work was partly financed by FCT / MCTES through national funds (PIDDAC) under the R&D Unit Institute for Sustainability and Innovation in Structural Engineering (ISISE), under reference UIDB/04029/2020. This work is financed by national funds through FCT under grant agreement [DFA/BD/08403/2021] attributed to the first author. |
| Databáze: | OpenAIRE |
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