Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Long-Term Behaviour of GFRP-Reinforced Masonry Components Under Outdoor Environmental Conditions: Results After 5-Year Exposure
https://orcid.org/http://orcid.org/0000-0002-1369-6209
https://orcid.org/http://orcid.org/0000-0003-4212-8961
https://orcid.org/http://orcid.org/0000-0002-8547-3805
https://orcid.org/http://orcid.org/0000-0001-8459-0199
Fiber-reinforced polymers (FRP) have found extensive application in the strengthening and repair of masonry since the 1990s. Despite significant research into the short-term performance of FRP-strengthened masonry, there is still a limited understanding of their long-term behaviour and durability. Therefore, it is still necessary to gain a deeper insight into the mechanisms causing degradation and durability challenges, particularly in situations where these materials are exposed to more severe decay, such as externally bonded systems. Various accelerated ageing tests have been devised to replicate environmental conditions in a shorter time frame. These tests include immersion in water, freeze-thaw cycles, exposure to hygrothermal variations, salt crystallization, and UV radiation, among others. However, the use of accelerated ageing data for reliable estimations of service life requires a clear correlation with actual environmental processes. This study presents preliminary findings from a real exposure experimental campaign spanning 5 years. The complete experimental program (12 years) aims to analyse the natural ageing of masonry components reinforced with externally bonded glass fibres (GFRP). The ageing conditions encompass three scenarios: (a) direct outdoor exposure, involving outdoor hygrothermal variations, sunlight, and rainfall; (b) indirect outdoor exposure, with outdoor hygrothermal variations but sheltered from sunlight and rain; (c) control group maintained in laboratory conditions. The specimens comprise solid extruded fired-clay bricks reinforced with unidirectional GFRP sheets externally bonded through the wet lay-up procedure. Ageing effects on bond performance are evaluated by means of single-lap shear tests. Additionally, the study investigates the impact of surface treatment and the addition of an external render on bond durability.
Long-Term Behaviour of GFRP-Reinforced Masonry Components Under Outdoor Environmental Conditions: Results After 5-Year Exposure
https://orcid.org/http://orcid.org/0000-0002-1369-6209
https://orcid.org/http://orcid.org/0000-0003-4212-8961
https://orcid.org/http://orcid.org/0000-0002-8547-3805
https://orcid.org/http://orcid.org/0000-0001-8459-0199
Fiber-reinforced polymers (FRP) have found extensive application in the strengthening and repair of masonry since the 1990s. Despite significant research into the short-term performance of FRP-strengthened masonry, there is still a limited understanding of their long-term behaviour and durability. Therefore, it is still necessary to gain a deeper insight into the mechanisms causing degradation and durability challenges, particularly in situations where these materials are exposed to more severe decay, such as externally bonded systems. Various accelerated ageing tests have been devised to replicate environmental conditions in a shorter time frame. These tests include immersion in water, freeze-thaw cycles, exposure to hygrothermal variations, salt crystallization, and UV radiation, among others. However, the use of accelerated ageing data for reliable estimations of service life requires a clear correlation with actual environmental processes. This study presents preliminary findings from a real exposure experimental campaign spanning 5 years. The complete experimental program (12 years) aims to analyse the natural ageing of masonry components reinforced with externally bonded glass fibres (GFRP). The ageing conditions encompass three scenarios: (a) direct outdoor exposure, involving outdoor hygrothermal variations, sunlight, and rainfall; (b) indirect outdoor exposure, with outdoor hygrothermal variations but sheltered from sunlight and rain; (c) control group maintained in laboratory conditions. The specimens comprise solid extruded fired-clay bricks reinforced with unidirectional GFRP sheets externally bonded through the wet lay-up procedure. Ageing effects on bond performance are evaluated by means of single-lap shear tests. Additionally, the study investigates the impact of surface treatment and the addition of an external render on bond durability.
Long-Term Behaviour of GFRP-Reinforced Masonry Components Under Outdoor Environmental Conditions: Results After 5-Year Exposure
https://orcid.org/http://orcid.org/0000-0002-1369-6209
https://orcid.org/http://orcid.org/0000-0003-4212-8961
https://orcid.org/http://orcid.org/0000-0002-8547-3805
https://orcid.org/http://orcid.org/0000-0001-8459-0199
Fiber-reinforced polymers (FRP) have found extensive application in the strengthening and repair of masonry since the 1990s. Despite significant research into the short-term performance of FRP-strengthened masonry, there is still a limited understanding of their long-term behaviour and durability. Therefore, it is still necessary to gain a deeper insight into the mechanisms causing degradation and durability challenges, particularly in situations where these materials are exposed to more severe decay, such as externally bonded systems. Various accelerated ageing tests have been devised to replicate environmental conditions in a shorter time frame. These tests include immersion in water, freeze-thaw cycles, exposure to hygrothermal variations, salt crystallization, and UV radiation, among others. However, the use of accelerated ageing data for reliable estimations of service life requires a clear correlation with actual environmental processes. This study presents preliminary findings from a real exposure experimental campaign spanning 5 years. The complete experimental program (12 years) aims to analyse the natural ageing of masonry components reinforced with externally bonded glass fibres (GFRP). The ageing conditions encompass three scenarios: (a) direct outdoor exposure, involving outdoor hygrothermal variations, sunlight, and rainfall; (b) indirect outdoor exposure, with outdoor hygrothermal variations but sheltered from sunlight and rain; (c) control group maintained in laboratory conditions. The specimens comprise solid extruded fired-clay bricks reinforced with unidirectional GFRP sheets externally bonded through the wet lay-up procedure. Ageing effects on bond performance are evaluated by means of single-lap shear tests. Additionally, the study investigates the impact of surface treatment and the addition of an external render on bond durability.
Long-Term Behaviour of GFRP-Reinforced Masonry Components Under Outdoor Environmental Conditions: Results After 5-Year Exposure
Lecture Notes in Civil Engineering
Milani, Gabriele (Herausgeber:in) / Ghiassi, Bahman (Herausgeber:in) / Ramirez, Rafael (Autor:in) / Ghiassi, Bahman (Autor:in) / Oliveira, Daniel (Autor:in) / Lourenço, Paulo B. (Autor:in)
International Brick and Block Masonry Conference ; 2024 ; Birmingham, United Kingdom
13.12.2024
12 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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