Concrete-to-concrete bond strength. Influence of the roughness of the substrate surface

Detalhes bibliográficos
Autor(a) principal: Júlio, Eduardo N. B. S.
Data de Publicação: 2004
Outros Autores: Branco, Fernando A. B., Silva, Vítor D.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/3982
https://doi.org/10.1016/j.conbuildmat.2004.04.023
Resumo: An experimental study was performed to evaluate the bond strength between two concrete layers, for different techniques for increasing the roughness of the substrate surface. In a total of 25 slant shear specimens and 25 pull-off specimens the substrate surface was prepared by wire-brushing; sand-blasting; chipping with a light jackhammer; or were left as-cast against steel formwork. Three months later, the new concrete was added. Pull-off tests were performed to evaluate the bond strength in tension. Slant shear tests were conducted to quantify the bond strength in shear. Analysis of results indicated that: the highest value of bond strength was achieved with sand-blasting; pull-off tests are adequate to estimate the bond strength in situ; and pre-wetting the substrate surface does not seem to influence the bond strength.
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spelling Concrete-to-concrete bond strength. Influence of the roughness of the substrate surfaceConcreteRoughnessStrengthAn experimental study was performed to evaluate the bond strength between two concrete layers, for different techniques for increasing the roughness of the substrate surface. In a total of 25 slant shear specimens and 25 pull-off specimens the substrate surface was prepared by wire-brushing; sand-blasting; chipping with a light jackhammer; or were left as-cast against steel formwork. Three months later, the new concrete was added. Pull-off tests were performed to evaluate the bond strength in tension. Slant shear tests were conducted to quantify the bond strength in shear. Analysis of results indicated that: the highest value of bond strength was achieved with sand-blasting; pull-off tests are adequate to estimate the bond strength in situ; and pre-wetting the substrate surface does not seem to influence the bond strength.http://www.sciencedirect.com/science/article/B6V2G-4CMYMDN-3/1/b64e1833c354a3d441d24c410cb979d32004info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/3982http://hdl.handle.net/10316/3982https://doi.org/10.1016/j.conbuildmat.2004.04.023engConstruction and Building Materials. 18:9 (2004) 675-681Júlio, Eduardo N. B. S.Branco, Fernando A. B.Silva, Vítor D.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-11-06T16:48:55Zoai:estudogeral.uc.pt:10316/3982Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:57:11.021311Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Concrete-to-concrete bond strength. Influence of the roughness of the substrate surface
title Concrete-to-concrete bond strength. Influence of the roughness of the substrate surface
spellingShingle Concrete-to-concrete bond strength. Influence of the roughness of the substrate surface
Júlio, Eduardo N. B. S.
Concrete
Roughness
Strength
title_short Concrete-to-concrete bond strength. Influence of the roughness of the substrate surface
title_full Concrete-to-concrete bond strength. Influence of the roughness of the substrate surface
title_fullStr Concrete-to-concrete bond strength. Influence of the roughness of the substrate surface
title_full_unstemmed Concrete-to-concrete bond strength. Influence of the roughness of the substrate surface
title_sort Concrete-to-concrete bond strength. Influence of the roughness of the substrate surface
author Júlio, Eduardo N. B. S.
author_facet Júlio, Eduardo N. B. S.
Branco, Fernando A. B.
Silva, Vítor D.
author_role author
author2 Branco, Fernando A. B.
Silva, Vítor D.
author2_role author
author
dc.contributor.author.fl_str_mv Júlio, Eduardo N. B. S.
Branco, Fernando A. B.
Silva, Vítor D.
dc.subject.por.fl_str_mv Concrete
Roughness
Strength
topic Concrete
Roughness
Strength
description An experimental study was performed to evaluate the bond strength between two concrete layers, for different techniques for increasing the roughness of the substrate surface. In a total of 25 slant shear specimens and 25 pull-off specimens the substrate surface was prepared by wire-brushing; sand-blasting; chipping with a light jackhammer; or were left as-cast against steel formwork. Three months later, the new concrete was added. Pull-off tests were performed to evaluate the bond strength in tension. Slant shear tests were conducted to quantify the bond strength in shear. Analysis of results indicated that: the highest value of bond strength was achieved with sand-blasting; pull-off tests are adequate to estimate the bond strength in situ; and pre-wetting the substrate surface does not seem to influence the bond strength.
publishDate 2004
dc.date.none.fl_str_mv 2004
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 http://hdl.handle.net/10316/3982
http://hdl.handle.net/10316/3982
https://doi.org/10.1016/j.conbuildmat.2004.04.023
url http://hdl.handle.net/10316/3982
https://doi.org/10.1016/j.conbuildmat.2004.04.023
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Construction and Building Materials. 18:9 (2004) 675-681
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv aplication/PDF
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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