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https://hdl.handle.net/1822/88472
Título: | Preliminary results on natural aging of GFRP-reinforced masonry components exposed to outdoor environmental conditions |
Autor(es): | Ramirez, Rafael Ghiassi, Bahman Oliveira, Daniel V. Lourenço, Paulo B. |
Palavras-chave: | Natural aging Durability GFRP-reinforced masonry Bond degradation Single-lap shear test |
Data: | 2022 |
Editora: | Trans Tech Publications |
Revista: | Key Engineering Materials |
Resumo(s): | Fiber-reinforced polymers (FRP) have been widely used for strengthening and repair of masonry structures since the 1990s. Although the short-term performance of such systems has been extensively studied, their durability and long-term behavior are still scarcely known. Therefore, a better understanding of the corresponding degradation mechanisms and durability issues is of major interest, especially in cases of externally bonded systems where the materials are prone to undergo a more severe decay. Different accelerated aging tests have been developed in order to simulate weathering conditions in a shorter time: water immersion, freeze-thaw, hygrothermal cycles, salt crystallization, UV radiation, etc. Nonetheless, accelerated aging data cannot be used to make reliable service life estimations without a clear correlation with real environmental processes. In this study, we present the preliminary results (3/12 years) of a real exposure experimental campaign devoted to analyzing the natural aging of masonry components reinforced with externally bonded glass fibers (GFRP). The aging conditions consist of: (a) direct outdoor exposure, i.e. outdoor hygrothermal variation + sun and rain; (b) indirect outdoor exposure, i.e. outdoor hygrothermal variation + sheltered from sun and rain; (c) laboratory conditions as control group. The specimens consist of solid extruded fired-clay bricks strengthened with unidirectional GFRP sheets following the wet lay-up procedure. The aging effects on bond performance are studied by means of single-lap shear tests. Finally, the effect of brick surface treatment and the application of an external render on bond durability is investigated. |
Tipo: | Artigo em ata de conferência |
URI: | https://hdl.handle.net/1822/88472 |
ISBN: | 9783036400495 |
DOI: | 10.4028/p-tyg4l7 |
ISSN: | 1013-9826 |
e-ISSN: | 1662-9795 |
Versão da editora: | https://www.scientific.net/KEM.916.11 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | ISISE - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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2022_ARI_Preliminary results on natural aging of GFRP-reinforced masonry.pdf Acesso restrito! | 1,62 MB | Adobe PDF | Ver/Abrir |