TIMBER BEAM REPAIR BASED ON POLYMER-CEMENTITIOUS BLENDS

Detalhes bibliográficos
Autor(a) principal: Christoforo,André L.
Data de Publicação: 2017
Outros Autores: Panzera,Tulio H., Araujo,Victor A. de, Fiorelli,Juliano, Lahr,Francisco A. R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Engenharia Agrícola
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200366
Resumo: ABSTRACT This study aims to manufacture and apply polymer-cementitious blends based on a combination of epoxy polymer and Ordinary Portland Cement (OPC) for timber beam repair. The material was used to repair timber beams of “Maçaranduba” (Manilkara sp.) and “Cedro doce” (Cedrella spp) wood species. A full factorial design was conducted to investigate the effect of cement particle content (0wt%, 30wt%, 40wt% and 50wt %), type of cement (ASTM-II and ASTM-III), and pigment addition (0wt% and 0.2wt%) on the physical and mechanical properties of the blend. The cement content factor affected all properties investigated. The highest elastic modulus was achieved by the blends produced with 50wt% of cement and 0.2wt% of pigment inclusion. This condition was used to repair the timber beams evaluated under four-point bending test. The insertion of the blends in timber beams achieved superior load levels to the unreinforced woods in both species, inferior load levels to the reference condition (without defects) in “Cedro doce”, and superior to the reference condition in “Maçaranduba”. These results were justified by the low density of “Cedro doce”, providing a better blend-wood interface adhesion.
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spelling TIMBER BEAM REPAIR BASED ON POLYMER-CEMENTITIOUS BLENDSWoodbendingbeamscomposite sectionconnectorsABSTRACT This study aims to manufacture and apply polymer-cementitious blends based on a combination of epoxy polymer and Ordinary Portland Cement (OPC) for timber beam repair. The material was used to repair timber beams of “Maçaranduba” (Manilkara sp.) and “Cedro doce” (Cedrella spp) wood species. A full factorial design was conducted to investigate the effect of cement particle content (0wt%, 30wt%, 40wt% and 50wt %), type of cement (ASTM-II and ASTM-III), and pigment addition (0wt% and 0.2wt%) on the physical and mechanical properties of the blend. The cement content factor affected all properties investigated. The highest elastic modulus was achieved by the blends produced with 50wt% of cement and 0.2wt% of pigment inclusion. This condition was used to repair the timber beams evaluated under four-point bending test. The insertion of the blends in timber beams achieved superior load levels to the unreinforced woods in both species, inferior load levels to the reference condition (without defects) in “Cedro doce”, and superior to the reference condition in “Maçaranduba”. These results were justified by the low density of “Cedro doce”, providing a better blend-wood interface adhesion.Associação Brasileira de Engenharia Agrícola2017-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200366Engenharia Agrícola v.37 n.2 2017reponame:Engenharia Agrícolainstname:Associação Brasileira de Engenharia Agrícola (SBEA)instacron:SBEA10.1590/1809-4430-eng.agric.v37n2p366-375/2017info:eu-repo/semantics/openAccessChristoforo,André L.Panzera,Tulio H.Araujo,Victor A. deFiorelli,JulianoLahr,Francisco A. R.eng2017-04-03T00:00:00Zoai:scielo:S0100-69162017000200366Revistahttp://www.engenhariaagricola.org.br/ORGhttps://old.scielo.br/oai/scielo-oai.phprevistasbea@sbea.org.br||sbea@sbea.org.br1809-44300100-6916opendoar:2017-04-03T00:00Engenharia Agrícola - Associação Brasileira de Engenharia Agrícola (SBEA)false
dc.title.none.fl_str_mv TIMBER BEAM REPAIR BASED ON POLYMER-CEMENTITIOUS BLENDS
title TIMBER BEAM REPAIR BASED ON POLYMER-CEMENTITIOUS BLENDS
spellingShingle TIMBER BEAM REPAIR BASED ON POLYMER-CEMENTITIOUS BLENDS
Christoforo,André L.
Wood
bending
beams
composite section
connectors
title_short TIMBER BEAM REPAIR BASED ON POLYMER-CEMENTITIOUS BLENDS
title_full TIMBER BEAM REPAIR BASED ON POLYMER-CEMENTITIOUS BLENDS
title_fullStr TIMBER BEAM REPAIR BASED ON POLYMER-CEMENTITIOUS BLENDS
title_full_unstemmed TIMBER BEAM REPAIR BASED ON POLYMER-CEMENTITIOUS BLENDS
title_sort TIMBER BEAM REPAIR BASED ON POLYMER-CEMENTITIOUS BLENDS
author Christoforo,André L.
author_facet Christoforo,André L.
Panzera,Tulio H.
Araujo,Victor A. de
Fiorelli,Juliano
Lahr,Francisco A. R.
author_role author
author2 Panzera,Tulio H.
Araujo,Victor A. de
Fiorelli,Juliano
Lahr,Francisco A. R.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Christoforo,André L.
Panzera,Tulio H.
Araujo,Victor A. de
Fiorelli,Juliano
Lahr,Francisco A. R.
dc.subject.por.fl_str_mv Wood
bending
beams
composite section
connectors
topic Wood
bending
beams
composite section
connectors
description ABSTRACT This study aims to manufacture and apply polymer-cementitious blends based on a combination of epoxy polymer and Ordinary Portland Cement (OPC) for timber beam repair. The material was used to repair timber beams of “Maçaranduba” (Manilkara sp.) and “Cedro doce” (Cedrella spp) wood species. A full factorial design was conducted to investigate the effect of cement particle content (0wt%, 30wt%, 40wt% and 50wt %), type of cement (ASTM-II and ASTM-III), and pigment addition (0wt% and 0.2wt%) on the physical and mechanical properties of the blend. The cement content factor affected all properties investigated. The highest elastic modulus was achieved by the blends produced with 50wt% of cement and 0.2wt% of pigment inclusion. This condition was used to repair the timber beams evaluated under four-point bending test. The insertion of the blends in timber beams achieved superior load levels to the unreinforced woods in both species, inferior load levels to the reference condition (without defects) in “Cedro doce”, and superior to the reference condition in “Maçaranduba”. These results were justified by the low density of “Cedro doce”, providing a better blend-wood interface adhesion.
publishDate 2017
dc.date.none.fl_str_mv 2017-04-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200366
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200366
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1809-4430-eng.agric.v37n2p366-375/2017
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Brasileira de Engenharia Agrícola
publisher.none.fl_str_mv Associação Brasileira de Engenharia Agrícola
dc.source.none.fl_str_mv Engenharia Agrícola v.37 n.2 2017
reponame:Engenharia Agrícola
instname:Associação Brasileira de Engenharia Agrícola (SBEA)
instacron:SBEA
instname_str Associação Brasileira de Engenharia Agrícola (SBEA)
instacron_str SBEA
institution SBEA
reponame_str Engenharia Agrícola
collection Engenharia Agrícola
repository.name.fl_str_mv Engenharia Agrícola - Associação Brasileira de Engenharia Agrícola (SBEA)
repository.mail.fl_str_mv revistasbea@sbea.org.br||sbea@sbea.org.br
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