Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bonding performance of Portuguese Maritime pine glued laminated timber
Highlights Evaluation of the bonding performance of Portuguese Maritime pine. Delamination and shear strength tests. Performance of different adhesives for structural applications. Influence of the amount of adhesive and clamping pressure on bonding performance.
Abstract The use of timber for construction purposes in Portugal has decreased during the last century. However, recent market requests aiming at sustainable constructions led to a rediscovery of timber structures. Glued laminated timber is one of the most used timber construction products and its production using Portuguese Maritime pine (Pinus pinaster Ait.) has been studied and validated concerning its economic and mechanical performance. This paper aims to present a state of the art of the research conducted so far on the use of Maritime Pine for glulam as well as new research conveying bonding with more recent adhesives. The ongoing study comprised an extended experimental campaign on gluing Maritime pine timber grown in Portugal, for glulam production. Eight different adhesives were considered, namely based on: i) Phenol-Resorcinol-Formaldehyde (PRF), ii) Melamine-Urea-Formaldehyde (MUF), iii) Emulsion-Polymer-Isocyanate (EPI) and iv) Single Component Polyurethane (1C-PUR). The amount of adhesive used and the clamping pressure were considered as main variables. Delamination specimens were tested according to Method A of EN 14080 and shear strength tests followed Annex D of the same standard. In terms of delamination it was observed an excellent performance of all PRF adhesives. MUF, EPI and 1C-PUR adhesives presented good bonding performance, however, it is important to emphasize the need to use primer (PR) in the case of 1C-PUR adhesive. The shear strength was not influenced significantly by the adhesive type but some differences were found on Wood Failure Percentage for EPI and 1C-PUR adhesives.
Bonding performance of Portuguese Maritime pine glued laminated timber
Highlights Evaluation of the bonding performance of Portuguese Maritime pine. Delamination and shear strength tests. Performance of different adhesives for structural applications. Influence of the amount of adhesive and clamping pressure on bonding performance.
Abstract The use of timber for construction purposes in Portugal has decreased during the last century. However, recent market requests aiming at sustainable constructions led to a rediscovery of timber structures. Glued laminated timber is one of the most used timber construction products and its production using Portuguese Maritime pine (Pinus pinaster Ait.) has been studied and validated concerning its economic and mechanical performance. This paper aims to present a state of the art of the research conducted so far on the use of Maritime Pine for glulam as well as new research conveying bonding with more recent adhesives. The ongoing study comprised an extended experimental campaign on gluing Maritime pine timber grown in Portugal, for glulam production. Eight different adhesives were considered, namely based on: i) Phenol-Resorcinol-Formaldehyde (PRF), ii) Melamine-Urea-Formaldehyde (MUF), iii) Emulsion-Polymer-Isocyanate (EPI) and iv) Single Component Polyurethane (1C-PUR). The amount of adhesive used and the clamping pressure were considered as main variables. Delamination specimens were tested according to Method A of EN 14080 and shear strength tests followed Annex D of the same standard. In terms of delamination it was observed an excellent performance of all PRF adhesives. MUF, EPI and 1C-PUR adhesives presented good bonding performance, however, it is important to emphasize the need to use primer (PR) in the case of 1C-PUR adhesive. The shear strength was not influenced significantly by the adhesive type but some differences were found on Wood Failure Percentage for EPI and 1C-PUR adhesives.
Bonding performance of Portuguese Maritime pine glued laminated timber
Martins, Carlos (Autor:in) / Dias, Alfredo M.P.G. (Autor:in) / Cruz, Helena (Autor:in)
Construction and Building Materials ; 223 ; 520-529
18.06.2019
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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Structural glued laminated timber
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