A study of the bonding of wood from Eucalyptus grandis W. Hill ex Maiden using resorcinol-formaldehyde adhesive
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/14492 |
Resumo: | This work aims to evaluate the strength of joints bonded with thermosetting resorcinol-formaldehyde adhesive, as obtained from three radial and three longitudinal positions relative to the log in wood of Eucalyptus grandis W. Hill ex Maiden (Myrtaceae) at age 18 years, and also to correlate it with basic density. The adhesive spread rate was 250 g/m2 using double lines and adding hardener at a rate of one part of hardener to five parts of adhesive. Moisture content in the wood sheets at the time of bonding was 12%. Bonded joints were prepared according to standard ASTM D 2339-98. Basic density values showed an increasing tendency in the pith-to-bark direction while no significant variation was noted in the base-to-top direction. Higher mean values of shear strength and smaller percentages of wood failure were obtained from joints originated in positions close to the bark and to the log base. Overall, the bonding behavior of resorcinol-formaldehyde adhesive in Eucalyptus grandis was found to vary considerably in different positions relative to the log. |
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A study of the bonding of wood from Eucalyptus grandis W. Hill ex Maiden using resorcinol-formaldehyde adhesiveEstudo da colagem da madeira de Eucalyptus grandis W. Hill ex Maiden com adesivo resorcinol-formaldeídoEucalyptBonded jointsThermosettingEucaliptoJuntas coladasTermoendurecedorThis work aims to evaluate the strength of joints bonded with thermosetting resorcinol-formaldehyde adhesive, as obtained from three radial and three longitudinal positions relative to the log in wood of Eucalyptus grandis W. Hill ex Maiden (Myrtaceae) at age 18 years, and also to correlate it with basic density. The adhesive spread rate was 250 g/m2 using double lines and adding hardener at a rate of one part of hardener to five parts of adhesive. Moisture content in the wood sheets at the time of bonding was 12%. Bonded joints were prepared according to standard ASTM D 2339-98. Basic density values showed an increasing tendency in the pith-to-bark direction while no significant variation was noted in the base-to-top direction. Higher mean values of shear strength and smaller percentages of wood failure were obtained from joints originated in positions close to the bark and to the log base. Overall, the bonding behavior of resorcinol-formaldehyde adhesive in Eucalyptus grandis was found to vary considerably in different positions relative to the log.Neste trabalho, objetivou-se avaliar a resistência de juntas coladas com adesivo termo endurecedor resorcinol-formaldeído provenientes de três posições radiais e três posições longitudinais da tora da madeira de Eucalyptus grandis W. Hill ex Maiden(Myrtaceae), com idade de 18 anos, relacionando-a com a densidade básica. A gramatura utilizada foi de 250 g/m2, em face dupla,com adição de endurecedor, na proporção de uma parte para cinco partes de adesivo. A umidade das lâminas, no momento da colagem, era de 12%. As juntas coladas foram preparadas de acordo com a norma ASTM D 2339-98. Os valores da densidade básica mostraram uma tendência de aumento no sentido medula-casca e no sentido longitudinal não houve variação significativa. Os valores médios mais elevados de resistência ao cisalhamento e as menores percentagem de falha na madeira foram obtidos em juntas provenientes das posições próximas à casca e à base da tora. O comportamento da qualidade da colagem com adesivo resorcinol-formaldeído na madeira de Eucalyptus grandis se mostrou bastante variável nas diferentes posições.Universidade Federal de Lavras (UFLA)2015-05-132017-08-01T20:15:06Z2017-08-01T20:15:06Z2017-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfALBINO, V. C. do S.; MORI, F. A.; MENDES, L. M. A study of the bonding of wood from Eucalyptus grandis W. Hill ex Maiden using resorcinol-formaldehyde adhesive. CERNE, Lavras, v. 16, n. 4, p. 443-449, out./dez. 2010.http://repositorio.ufla.br/jspui/handle/1/144922317-63420104-7760reponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAengAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessAlbino, Vanessa Cristina do SacramentoMori, Fábio AkiraMendes, Lourival Marin2021-02-03T01:24:40Zoai:localhost:1/14492Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2021-02-03T01:24:40Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
A study of the bonding of wood from Eucalyptus grandis W. Hill ex Maiden using resorcinol-formaldehyde adhesive Estudo da colagem da madeira de Eucalyptus grandis W. Hill ex Maiden com adesivo resorcinol-formaldeído |
title |
A study of the bonding of wood from Eucalyptus grandis W. Hill ex Maiden using resorcinol-formaldehyde adhesive |
spellingShingle |
A study of the bonding of wood from Eucalyptus grandis W. Hill ex Maiden using resorcinol-formaldehyde adhesive Albino, Vanessa Cristina do Sacramento Eucalypt Bonded joints Thermosetting Eucalipto Juntas coladas Termoendurecedor |
title_short |
A study of the bonding of wood from Eucalyptus grandis W. Hill ex Maiden using resorcinol-formaldehyde adhesive |
title_full |
A study of the bonding of wood from Eucalyptus grandis W. Hill ex Maiden using resorcinol-formaldehyde adhesive |
title_fullStr |
A study of the bonding of wood from Eucalyptus grandis W. Hill ex Maiden using resorcinol-formaldehyde adhesive |
title_full_unstemmed |
A study of the bonding of wood from Eucalyptus grandis W. Hill ex Maiden using resorcinol-formaldehyde adhesive |
title_sort |
A study of the bonding of wood from Eucalyptus grandis W. Hill ex Maiden using resorcinol-formaldehyde adhesive |
author |
Albino, Vanessa Cristina do Sacramento |
author_facet |
Albino, Vanessa Cristina do Sacramento Mori, Fábio Akira Mendes, Lourival Marin |
author_role |
author |
author2 |
Mori, Fábio Akira Mendes, Lourival Marin |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Albino, Vanessa Cristina do Sacramento Mori, Fábio Akira Mendes, Lourival Marin |
dc.subject.por.fl_str_mv |
Eucalypt Bonded joints Thermosetting Eucalipto Juntas coladas Termoendurecedor |
topic |
Eucalypt Bonded joints Thermosetting Eucalipto Juntas coladas Termoendurecedor |
description |
This work aims to evaluate the strength of joints bonded with thermosetting resorcinol-formaldehyde adhesive, as obtained from three radial and three longitudinal positions relative to the log in wood of Eucalyptus grandis W. Hill ex Maiden (Myrtaceae) at age 18 years, and also to correlate it with basic density. The adhesive spread rate was 250 g/m2 using double lines and adding hardener at a rate of one part of hardener to five parts of adhesive. Moisture content in the wood sheets at the time of bonding was 12%. Bonded joints were prepared according to standard ASTM D 2339-98. Basic density values showed an increasing tendency in the pith-to-bark direction while no significant variation was noted in the base-to-top direction. Higher mean values of shear strength and smaller percentages of wood failure were obtained from joints originated in positions close to the bark and to the log base. Overall, the bonding behavior of resorcinol-formaldehyde adhesive in Eucalyptus grandis was found to vary considerably in different positions relative to the log. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-05-13 2017-08-01T20:15:06Z 2017-08-01T20:15:06Z 2017-08-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
ALBINO, V. C. do S.; MORI, F. A.; MENDES, L. M. A study of the bonding of wood from Eucalyptus grandis W. Hill ex Maiden using resorcinol-formaldehyde adhesive. CERNE, Lavras, v. 16, n. 4, p. 443-449, out./dez. 2010. http://repositorio.ufla.br/jspui/handle/1/14492 |
identifier_str_mv |
ALBINO, V. C. do S.; MORI, F. A.; MENDES, L. M. A study of the bonding of wood from Eucalyptus grandis W. Hill ex Maiden using resorcinol-formaldehyde adhesive. CERNE, Lavras, v. 16, n. 4, p. 443-449, out./dez. 2010. |
url |
http://repositorio.ufla.br/jspui/handle/1/14492 |
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 (UFLA) |
publisher.none.fl_str_mv |
Universidade Federal de Lavras (UFLA) |
dc.source.none.fl_str_mv |
2317-6342 0104-7760 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 |
_version_ |
1784550062950449152 |