Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/60726
Título: | Influence of surface preparation method on the bond behavior of externally bonded CFRP reinforcements in concrete |
Autor(es): | Soares, Sérgio Sena-Cruz, José Cruz, José Ricardo Fernandes, Pedro |
Palavras-chave: | EBR CFRP laminates concrete surface preparation roughness characterization bond behavior analytical predictions |
Data: | 29-Jan-2019 |
Editora: | Multidisciplinary Digital Publishing Institute |
Revista: | Materials |
Resumo(s): | In last decades significant investigation has been carried out in order to predict the bond strength of externally bonded reinforcement (EBR) systems with carbon fiber reinforced polymer (CFRP) materials in concrete and, as consequence of that, many analytical expressions can be found in the literature, including in standards. However, these expressions do not account for the influence of several parameters on bond behavior such as the type of surface preparation which is a mandatory and critical task in the strengthening application. The present work gives contributions to reduce this lack of knowledge. For this purpose, an experimental program composed of single-lap shear tests was carried out, the main parameters studied being: (i) the type of concrete surface preparation (i.e., grinding and sandblasting) and (ii) the bond length. Prior to the application of the EBR CFRP system, the roughness level provided by the different methods of surface preparation was characterized by a laser sensor. Test results revealed that sandblasting concrete surface preparation yielded higher values, in terms of maximum shear force and fracture energy. Finally, existing expressions in standards were upgraded in order to account for the concrete surface roughness level in the estimation of the bond strength. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/60726 |
DOI: | 10.3390/ma12030414 |
ISSN: | 1996-1944 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | ISISE - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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materials-12-00414-v2.pdf | 4,81 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons