Estudo da resistência de aderência à tração e ao cisalhamento de revestimentos de argamassa em substratos de concreto
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFG |
Texto Completo: | http://repositorio.bc.ufg.br/tede/handle/tede/6843 |
Resumo: | Bond is the crucial property of a rendering system. It is the combining result of several mortar and concrete substrates`s properties. Then, isolated studies about this subject, with single variables are insuficient. The ideal perfect understanding of the stresses, of the materials and of the tensile and shear bond sthength properties can lead to advances in the rendering system`s quality. Most of the stresses acting in rendering systems are shear stresses and, however, there is a large gap in shear bond strength knowledge. There is no standard method for the evaluation of this property. Thus, the main objective of this dissertation is to propose a laboratory method to evaluate the shear bond strength of rendering mortar in a rendering system, by the adaptation of the standartized method ASTM D 3080, used for direct shear tests in soil. Furthermore, this study aimed to evaluate the substrates`s characteristics (water cement ratio and surface roughness) and the rendering mortar`s characteristics (mix proportion) in the tensile and shear bond strength, along with doing the correlation between the two properties. In order to do so, the experimental programme included studies of tensile bond strength (Rat), using the ABNT NBR 13528 and shear bond strength studies (Rac), using the ASTM D 3080 adaptation. To the Rat tests it was prepared 10 concrete substrates that was coated with rendering mortar with 3 mix proportion (1:2:9, 1:1:6 and 1:0,5:3,4). For the concrete substrates, it was varied the water cement ratio (0,35, 0,50, 0,65 and 0,80) and the surface roughness (a smooth R1 and a roughened R2 one). For the Rac studies it was prepared 160 concrete substrates, with a smaller dimension, using the water cement ratio of 0,65. In the Rac tests the studied variables were the surface roughness (R1 and R2), the mortar mix proportion (1:1:6 and 1:0,5:3,4) and the applied normal tension (0,01 MPa, 0,06 MPa, 0,09 MPa and 0,15 MPa). Besides, it was performed an extensive characterization of the rendering mortars and the substrate`s concrete. As conclusions, the research proved that the proposed shear bond method for rendering mortar was apropriate, with low deviation coefficient of the results (6%) and with sensibility to the imposed variables (diferent mortars and substrates). The mortar mix proportion and the roughness surface of the substrates do influence in Rat and Rac, and the first one is the most influent one. The water cement ratio of the substrates concrete also influences the Rat. Besides, it was found a logarithmic correlation between Rat and Rac, with R2value of 0,87. |
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Carasek, Helenahttp://lattes.cnpq.br/3023241186996790Vargas, Carlos Alberto Laurohttp://lattes.cnpq.br/3816106720170772Carasek, HelenaCascudo, OswaldoMasuero, Angela BorgesSilva, Angelo Just da Costa ehttp://lattes.cnpq.br/7949731447421415Campos, Marina de Oliveira2017-02-14T09:43:12Z2014-09-25CAMPOS, M. O. Estudo da resistência de aderência à tração e ao cisalhamento de revestimentos de argamassa em substratos de concreto. 2014. 323 f. Dissertação (Mestrado em Geotecnia, Estruturas e Construção Civil) - Universidade Federal de Goiás, Goiânia, 2014.http://repositorio.bc.ufg.br/tede/handle/tede/6843ark:/38995/0013000007fk2Bond is the crucial property of a rendering system. It is the combining result of several mortar and concrete substrates`s properties. Then, isolated studies about this subject, with single variables are insuficient. The ideal perfect understanding of the stresses, of the materials and of the tensile and shear bond sthength properties can lead to advances in the rendering system`s quality. Most of the stresses acting in rendering systems are shear stresses and, however, there is a large gap in shear bond strength knowledge. There is no standard method for the evaluation of this property. Thus, the main objective of this dissertation is to propose a laboratory method to evaluate the shear bond strength of rendering mortar in a rendering system, by the adaptation of the standartized method ASTM D 3080, used for direct shear tests in soil. Furthermore, this study aimed to evaluate the substrates`s characteristics (water cement ratio and surface roughness) and the rendering mortar`s characteristics (mix proportion) in the tensile and shear bond strength, along with doing the correlation between the two properties. In order to do so, the experimental programme included studies of tensile bond strength (Rat), using the ABNT NBR 13528 and shear bond strength studies (Rac), using the ASTM D 3080 adaptation. To the Rat tests it was prepared 10 concrete substrates that was coated with rendering mortar with 3 mix proportion (1:2:9, 1:1:6 and 1:0,5:3,4). For the concrete substrates, it was varied the water cement ratio (0,35, 0,50, 0,65 and 0,80) and the surface roughness (a smooth R1 and a roughened R2 one). For the Rac studies it was prepared 160 concrete substrates, with a smaller dimension, using the water cement ratio of 0,65. In the Rac tests the studied variables were the surface roughness (R1 and R2), the mortar mix proportion (1:1:6 and 1:0,5:3,4) and the applied normal tension (0,01 MPa, 0,06 MPa, 0,09 MPa and 0,15 MPa). Besides, it was performed an extensive characterization of the rendering mortars and the substrate`s concrete. As conclusions, the research proved that the proposed shear bond method for rendering mortar was apropriate, with low deviation coefficient of the results (6%) and with sensibility to the imposed variables (diferent mortars and substrates). The mortar mix proportion and the roughness surface of the substrates do influence in Rat and Rac, and the first one is the most influent one. The water cement ratio of the substrates concrete also influences the Rat. Besides, it was found a logarithmic correlation between Rat and Rac, with R2value of 0,87.A aderência é a propriedade fundamental de um sistema de revestimento de argamassa aderido. Por ser a aderência resultado da combinação de várias propriedades da interface entre argamassa e substrato, estudos isolados, com variáveis únicas, são insuficientes. O perfeito entendimento do comportamento das tensões, dos materiais e das propriedades de resistência de aderência (tração e cisalhamento) podem conduzir a avanços na qualidade dos revestimentos de argamassa. A maioria das tensões atuantes nos sistemas de revestimentos são cisalhantes e, no entanto, existe uma grande lacuna no conhecimento acerca da resistência de aderência ao cisalhamento. Ainda não existe nenhum método normalizado para a avaliação dessa propriedade. Dessa forma, o objetivo principal da dissertação é o de propor um método de avaliação, em laboratório, da resistência de aderência ao cisalhamento para revestimentos de argamassa, a partir da adaptação do método normalizado pela ASTM D 3080 de cisalhamento direto em solo. Ademais, o trabalho visou avaliar a influência das características do substrato (a/c e rugosidade) e das argamassas (diferentes proporcionamentos) nas resistências de aderência à tração e ao cisalhamento, além de correlacionar os resultados obtidos nesses dois ensaios. Para tanto, o programa experimental abrangeu estudos de resistência de aderência à tração (Rat), empregando o método ABNT NBR 13528 e estudos de resistência de aderência ao cisalhamento (Rac), realizados conforme adaptação do método ASTM D 3080. Para os ensaios de Rat foram moldados 10 substratos simulando pilares, os quais foram revestidos com argamassas projetadas em três proporcionamentos, em volume, (1:2:9, 1:1:6 e 1:0,5:3,4) cimento, cal e areia úmida. Com relação ao substrato foram variadas a relação a/c (0,35, 0,50, 0,65 e 0,80) e a rugosidade (lisa – R1 e rugosa – R2). Para os estudos de resistência de aderência ao cisalhamento (Rac), foram moldados 160 substratos de menor dimensão utilizando o concreto de relação água/cimento de 0,65. Nessa etapa, as variáveis testadas foram a rugosidade (R1 e R2), o proporcionamento das argamassas (1:1:6 e 1:0,5:3,4), além da tensão normal aplicada (0,01MPa, 0,06MPa, 0,09MPa e 0,15MPa) Adicionalmente foi realizada uma ampla caracterização no estado endurecido das argamassas de revestimento e dos concretos dos substratos. Como principais conclusões da pesquisa, tem-se que o método proposto para determinação da resistência de aderência ao cisalhamento mostrou-se adequado, com baixo coeficiente de variação dos resultados (em média 6%) e com sensibilidade às variações impostas (diferentes argamassas e substratos). Observou-se que o proporcionamento da argamassa e a rugosidade do concreto dos substratos possuem influência significativa nas resistências de aderência à tração e ao cisalhamento, sendo o primeiro fator o mais influente. A relação água/cimento do concreto dos substratos também possui influência na resistência de aderência à tração. Adicionalmente, foi encontrada uma boa correlação entre Rat e Rac, com um valor de R2 de 0,87 para uma função do tipo logarítmica (ln).Submitted by Erika Demachki (erikademachki@gmail.com) on 2017-02-13T17:22:05Z No. of bitstreams: 2 Dissertação - Marina de Oliveira Campos - 2014.pdf: 13269135 bytes, checksum: 836275079c9f910e9129b36c9fe2c2fc (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-02-14T09:43:12Z (GMT) No. of bitstreams: 2 Dissertação - Marina de Oliveira Campos - 2014.pdf: 13269135 bytes, checksum: 836275079c9f910e9129b36c9fe2c2fc (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Made available in DSpace on 2017-02-14T09:43:12Z (GMT). No. of bitstreams: 2 Dissertação - Marina de Oliveira Campos - 2014.pdf: 13269135 bytes, checksum: 836275079c9f910e9129b36c9fe2c2fc (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2014-09-25application/pdfporUniversidade Federal de GoiásPrograma de Pós-graduação em Geotecnia, Estruturas e Construção Civil (EEC)UFGBrasilEscola de Engenharia Civil - EEC (RG)http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessRevestimentoAderênciaCisalhamentoBondRenderingShearENGENHARIAS::ENGENHARIA CIVILEstudo da resistência de aderência à tração e ao cisalhamento de revestimentos de argamassa em substratos de concretoStudy of rendering mortar’s shear and bond strength in concrete substratesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis6915322422128222104600600600724087251626315585-6274833215046395772reponame:Repositório Institucional da UFGinstname:Universidade Federal de Goiás (UFG)instacron:UFGLICENSElicense.txtlicense.txttext/plain; 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dc.title.por.fl_str_mv |
Estudo da resistência de aderência à tração e ao cisalhamento de revestimentos de argamassa em substratos de concreto |
dc.title.alternative.eng.fl_str_mv |
Study of rendering mortar’s shear and bond strength in concrete substrates |
title |
Estudo da resistência de aderência à tração e ao cisalhamento de revestimentos de argamassa em substratos de concreto |
spellingShingle |
Estudo da resistência de aderência à tração e ao cisalhamento de revestimentos de argamassa em substratos de concreto Campos, Marina de Oliveira Revestimento Aderência Cisalhamento Bond Rendering Shear ENGENHARIAS::ENGENHARIA CIVIL |
title_short |
Estudo da resistência de aderência à tração e ao cisalhamento de revestimentos de argamassa em substratos de concreto |
title_full |
Estudo da resistência de aderência à tração e ao cisalhamento de revestimentos de argamassa em substratos de concreto |
title_fullStr |
Estudo da resistência de aderência à tração e ao cisalhamento de revestimentos de argamassa em substratos de concreto |
title_full_unstemmed |
Estudo da resistência de aderência à tração e ao cisalhamento de revestimentos de argamassa em substratos de concreto |
title_sort |
Estudo da resistência de aderência à tração e ao cisalhamento de revestimentos de argamassa em substratos de concreto |
author |
Campos, Marina de Oliveira |
author_facet |
Campos, Marina de Oliveira |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Carasek, Helena |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/3023241186996790 |
dc.contributor.advisor-co1.fl_str_mv |
Vargas, Carlos Alberto Lauro |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/3816106720170772 |
dc.contributor.referee1.fl_str_mv |
Carasek, Helena |
dc.contributor.referee2.fl_str_mv |
Cascudo, Oswaldo |
dc.contributor.referee3.fl_str_mv |
Masuero, Angela Borges |
dc.contributor.referee4.fl_str_mv |
Silva, Angelo Just da Costa e |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/7949731447421415 |
dc.contributor.author.fl_str_mv |
Campos, Marina de Oliveira |
contributor_str_mv |
Carasek, Helena Vargas, Carlos Alberto Lauro Carasek, Helena Cascudo, Oswaldo Masuero, Angela Borges Silva, Angelo Just da Costa e |
dc.subject.por.fl_str_mv |
Revestimento Aderência Cisalhamento |
topic |
Revestimento Aderência Cisalhamento Bond Rendering Shear ENGENHARIAS::ENGENHARIA CIVIL |
dc.subject.eng.fl_str_mv |
Bond Rendering Shear |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA CIVIL |
description |
Bond is the crucial property of a rendering system. It is the combining result of several mortar and concrete substrates`s properties. Then, isolated studies about this subject, with single variables are insuficient. The ideal perfect understanding of the stresses, of the materials and of the tensile and shear bond sthength properties can lead to advances in the rendering system`s quality. Most of the stresses acting in rendering systems are shear stresses and, however, there is a large gap in shear bond strength knowledge. There is no standard method for the evaluation of this property. Thus, the main objective of this dissertation is to propose a laboratory method to evaluate the shear bond strength of rendering mortar in a rendering system, by the adaptation of the standartized method ASTM D 3080, used for direct shear tests in soil. Furthermore, this study aimed to evaluate the substrates`s characteristics (water cement ratio and surface roughness) and the rendering mortar`s characteristics (mix proportion) in the tensile and shear bond strength, along with doing the correlation between the two properties. In order to do so, the experimental programme included studies of tensile bond strength (Rat), using the ABNT NBR 13528 and shear bond strength studies (Rac), using the ASTM D 3080 adaptation. To the Rat tests it was prepared 10 concrete substrates that was coated with rendering mortar with 3 mix proportion (1:2:9, 1:1:6 and 1:0,5:3,4). For the concrete substrates, it was varied the water cement ratio (0,35, 0,50, 0,65 and 0,80) and the surface roughness (a smooth R1 and a roughened R2 one). For the Rac studies it was prepared 160 concrete substrates, with a smaller dimension, using the water cement ratio of 0,65. In the Rac tests the studied variables were the surface roughness (R1 and R2), the mortar mix proportion (1:1:6 and 1:0,5:3,4) and the applied normal tension (0,01 MPa, 0,06 MPa, 0,09 MPa and 0,15 MPa). Besides, it was performed an extensive characterization of the rendering mortars and the substrate`s concrete. As conclusions, the research proved that the proposed shear bond method for rendering mortar was apropriate, with low deviation coefficient of the results (6%) and with sensibility to the imposed variables (diferent mortars and substrates). The mortar mix proportion and the roughness surface of the substrates do influence in Rat and Rac, and the first one is the most influent one. The water cement ratio of the substrates concrete also influences the Rat. Besides, it was found a logarithmic correlation between Rat and Rac, with R2value of 0,87. |
publishDate |
2014 |
dc.date.issued.fl_str_mv |
2014-09-25 |
dc.date.accessioned.fl_str_mv |
2017-02-14T09:43:12Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
CAMPOS, M. O. Estudo da resistência de aderência à tração e ao cisalhamento de revestimentos de argamassa em substratos de concreto. 2014. 323 f. Dissertação (Mestrado em Geotecnia, Estruturas e Construção Civil) - Universidade Federal de Goiás, Goiânia, 2014. |
dc.identifier.uri.fl_str_mv |
http://repositorio.bc.ufg.br/tede/handle/tede/6843 |
dc.identifier.dark.fl_str_mv |
ark:/38995/0013000007fk2 |
identifier_str_mv |
CAMPOS, M. O. Estudo da resistência de aderência à tração e ao cisalhamento de revestimentos de argamassa em substratos de concreto. 2014. 323 f. Dissertação (Mestrado em Geotecnia, Estruturas e Construção Civil) - Universidade Federal de Goiás, Goiânia, 2014. ark:/38995/0013000007fk2 |
url |
http://repositorio.bc.ufg.br/tede/handle/tede/6843 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.program.fl_str_mv |
6915322422128222104 |
dc.relation.confidence.fl_str_mv |
600 600 600 |
dc.relation.department.fl_str_mv |
724087251626315585 |
dc.relation.cnpq.fl_str_mv |
-6274833215046395772 |
dc.rights.driver.fl_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
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UFG |
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Brasil |
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Escola de Engenharia Civil - EEC (RG) |
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Universidade Federal de Goiás |
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