Number of laminae on the mechanical behavior of glued laminated timber (glulam) of Toona ciliata produced with vegetable polyurethane adhesive

Detalhes bibliográficos
Autor(a) principal: Faria, Douglas Lamounier
Data de Publicação: 2019
Outros Autores: Cruz, Thiago Moreira, Mesquita Júnior, Laércio, Duarte, Paulo Junio, Mendes, Lourival Marin, Guimarães Júnior, José Benedito
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/40710
Resumo: The glued laminated timber (glulam) is a composite material obtained from the bonding of wood laminae arranged with parallel fibers put together. The purpose of this paper was to evaluate the influence of the number of laminae on the mechanical behavior of glulam of Toona ciliata produced with vegetable-based polyurethane adhesive. The glulam beams were produced with lamellae in the dimensions of 6.0 x 1.5 x 120.0 cm, with 3 beams being made per treatment, which were structurally composed by 5, 7 and 9 laminae. The polyurethane adhesive based on castor oil was used, applying a grammage of 350 g m-². For the technological characterization of the wood the moisture in the dry base, bulk density, chemical characterization, compressive strength parallel to the fibers, shear and modulus of elasticity (MOE) and rupture (MOR) in the static bending test. While the properties of modulus of elasticity (MOE), modulus of rupture (MOR), shear strength, delamination and visualization of the glue line through photomicrographs of the laminated wood samples were determined for glulam beams. The results showed that the beams with 5 laminae presented values ​​similar to solid wood. The increase in the number of laminae provided lower values ​​for stiffness and strength of the beams. The photomicrographs showed the quality of the bonding and the satisfactory values ​​for shear strength and delamination, indicating the viability of the species under study for situations with high moisture content.
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spelling Number of laminae on the mechanical behavior of glued laminated timber (glulam) of Toona ciliata produced with vegetable polyurethane adhesiveNúmero de lâminas no comportamento mecânico de madeira laminada colada (MLC) de Toona ciliata produzidas com adesivo poliuretano vegetalGlued laminated timberBond resistanceFlexural strengthResistência de ligaçãoResistência à flexãoMadeira laminada coladaThe glued laminated timber (glulam) is a composite material obtained from the bonding of wood laminae arranged with parallel fibers put together. The purpose of this paper was to evaluate the influence of the number of laminae on the mechanical behavior of glulam of Toona ciliata produced with vegetable-based polyurethane adhesive. The glulam beams were produced with lamellae in the dimensions of 6.0 x 1.5 x 120.0 cm, with 3 beams being made per treatment, which were structurally composed by 5, 7 and 9 laminae. The polyurethane adhesive based on castor oil was used, applying a grammage of 350 g m-². For the technological characterization of the wood the moisture in the dry base, bulk density, chemical characterization, compressive strength parallel to the fibers, shear and modulus of elasticity (MOE) and rupture (MOR) in the static bending test. While the properties of modulus of elasticity (MOE), modulus of rupture (MOR), shear strength, delamination and visualization of the glue line through photomicrographs of the laminated wood samples were determined for glulam beams. The results showed that the beams with 5 laminae presented values ​​similar to solid wood. The increase in the number of laminae provided lower values ​​for stiffness and strength of the beams. The photomicrographs showed the quality of the bonding and the satisfactory values ​​for shear strength and delamination, indicating the viability of the species under study for situations with high moisture content.A madeira laminada colada (MLC) é um material compósito obtido a partir da colagem de lâminas de madeira dispostas com as fibras paralelas entre si. O objetivo deste trabalho foi avaliar a influência do número de lâminas no comportamento mecânico de MLC de Toona ciliata produzidas com adesivo poliuretano de base vegetal. As vigas de MLC foram produzidas com lamelas nas dimensões de 6,0 x 1,5 x 120,0 cm, sendo confeccionadas 3 vigas por tratamento, os quais foram estruturalmente compostos por 5, 7 e 9 lâminas. Foi utilizado o adesivo poliuretano à base de óleo de mamona, sendo aplicada gramatura de 350 g m-². Para a caracterização tecnológica da madeira determinou-se a umidade na base seca, densidade aparente, caracterização química, resistência a compressão paralela às fibras, cisalhamento e os módulos de elasticidade (MOE) e ruptura (MOR) no ensaio de flexão estática. Enquanto para as vigas de MLC foram determinadas as propriedades de módulo de elasticidade (MOE), módulo de ruptura (MOR), resistência ao cisalhamento, delaminação e visualização da linha de cola por meio de fotomicrografias das amostras de madeira laminada colada. Os resultados mostraram que as vigas com 5 lâminas apresentaram valores semelhantes a madeira sólida. O aumento do número de lâminas, proporcionou menores valores para rigidez e resistência das vigas. As fotomicrografias comprovaram a qualidade da colagem e os valores satisfatórios para resistência ao cisalhamento e à delaminação, indicando a viabilidade da espécie em estudo para situações com alto teor de umidade.Universidade Federal de Lavras2020-05-08T12:58:15Z2020-05-08T12:58:15Z2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfFARIA, D. L. et al. Number of laminae on the mechanical behavior of glued laminated timber (glulam) of Toona ciliata produced with vegetable polyurethane adhesive. Ciência e Agrotecnologia, Lavras, v. 43, 2019. DOI: https://doi.org/10.1590/1413-7054201943014819.http://repositorio.ufla.br/jspui/handle/1/40710Ciência e Agrotecnologiareponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessFaria, Douglas LamounierCruz, Thiago MoreiraMesquita Júnior, LaércioDuarte, Paulo JunioMendes, Lourival MarinGuimarães Júnior, José Beneditoeng2020-05-08T12:58:16Zoai:localhost:1/40710Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2020-05-08T12:58:16Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Number of laminae on the mechanical behavior of glued laminated timber (glulam) of Toona ciliata produced with vegetable polyurethane adhesive
Número de lâminas no comportamento mecânico de madeira laminada colada (MLC) de Toona ciliata produzidas com adesivo poliuretano vegetal
title Number of laminae on the mechanical behavior of glued laminated timber (glulam) of Toona ciliata produced with vegetable polyurethane adhesive
spellingShingle Number of laminae on the mechanical behavior of glued laminated timber (glulam) of Toona ciliata produced with vegetable polyurethane adhesive
Faria, Douglas Lamounier
Glued laminated timber
Bond resistance
Flexural strength
Resistência de ligação
Resistência à flexão
Madeira laminada colada
title_short Number of laminae on the mechanical behavior of glued laminated timber (glulam) of Toona ciliata produced with vegetable polyurethane adhesive
title_full Number of laminae on the mechanical behavior of glued laminated timber (glulam) of Toona ciliata produced with vegetable polyurethane adhesive
title_fullStr Number of laminae on the mechanical behavior of glued laminated timber (glulam) of Toona ciliata produced with vegetable polyurethane adhesive
title_full_unstemmed Number of laminae on the mechanical behavior of glued laminated timber (glulam) of Toona ciliata produced with vegetable polyurethane adhesive
title_sort Number of laminae on the mechanical behavior of glued laminated timber (glulam) of Toona ciliata produced with vegetable polyurethane adhesive
author Faria, Douglas Lamounier
author_facet Faria, Douglas Lamounier
Cruz, Thiago Moreira
Mesquita Júnior, Laércio
Duarte, Paulo Junio
Mendes, Lourival Marin
Guimarães Júnior, José Benedito
author_role author
author2 Cruz, Thiago Moreira
Mesquita Júnior, Laércio
Duarte, Paulo Junio
Mendes, Lourival Marin
Guimarães Júnior, José Benedito
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Faria, Douglas Lamounier
Cruz, Thiago Moreira
Mesquita Júnior, Laércio
Duarte, Paulo Junio
Mendes, Lourival Marin
Guimarães Júnior, José Benedito
dc.subject.por.fl_str_mv Glued laminated timber
Bond resistance
Flexural strength
Resistência de ligação
Resistência à flexão
Madeira laminada colada
topic Glued laminated timber
Bond resistance
Flexural strength
Resistência de ligação
Resistência à flexão
Madeira laminada colada
description The glued laminated timber (glulam) is a composite material obtained from the bonding of wood laminae arranged with parallel fibers put together. The purpose of this paper was to evaluate the influence of the number of laminae on the mechanical behavior of glulam of Toona ciliata produced with vegetable-based polyurethane adhesive. The glulam beams were produced with lamellae in the dimensions of 6.0 x 1.5 x 120.0 cm, with 3 beams being made per treatment, which were structurally composed by 5, 7 and 9 laminae. The polyurethane adhesive based on castor oil was used, applying a grammage of 350 g m-². For the technological characterization of the wood the moisture in the dry base, bulk density, chemical characterization, compressive strength parallel to the fibers, shear and modulus of elasticity (MOE) and rupture (MOR) in the static bending test. While the properties of modulus of elasticity (MOE), modulus of rupture (MOR), shear strength, delamination and visualization of the glue line through photomicrographs of the laminated wood samples were determined for glulam beams. The results showed that the beams with 5 laminae presented values ​​similar to solid wood. The increase in the number of laminae provided lower values ​​for stiffness and strength of the beams. The photomicrographs showed the quality of the bonding and the satisfactory values ​​for shear strength and delamination, indicating the viability of the species under study for situations with high moisture content.
publishDate 2019
dc.date.none.fl_str_mv 2019
2020-05-08T12:58:15Z
2020-05-08T12:58:15Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv FARIA, D. L. et al. Number of laminae on the mechanical behavior of glued laminated timber (glulam) of Toona ciliata produced with vegetable polyurethane adhesive. Ciência e Agrotecnologia, Lavras, v. 43, 2019. DOI: https://doi.org/10.1590/1413-7054201943014819.
http://repositorio.ufla.br/jspui/handle/1/40710
identifier_str_mv FARIA, D. L. et al. Number of laminae on the mechanical behavior of glued laminated timber (glulam) of Toona ciliata produced with vegetable polyurethane adhesive. Ciência e Agrotecnologia, Lavras, v. 43, 2019. DOI: https://doi.org/10.1590/1413-7054201943014819.
url http://repositorio.ufla.br/jspui/handle/1/40710
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Lavras
publisher.none.fl_str_mv Universidade Federal de Lavras
dc.source.none.fl_str_mv Ciência e Agrotecnologia
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
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