Evaluation of the rheological coating mortar behavior by the direct shear test
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Research, Society and Development |
Texto Completo: | https://rsdjournal.org/index.php/rsd/article/view/11617 |
Resumo: | The coating mortars behavior in its fresh state has been the object of many recent researches in Brazil. It has become, therefore, interesting the introduction of new technologies, which seek to optimize the performance of mortars, improving the knowledge of its properties, allowing a productive enforcement and minimizing, overall, future failures. The article analyzes the coating mortars’ behavior, in its fresh state, verifying the efficiency in the use of the direct shear equipment, with different combinations of traces and composing materials. Four traces of mortar were dosed, with distinct proportions of lime (TR1 = 1:0:6; TR2 = 1:0,5:6; TR3 = 1:1:6 – reference; TR4 = 1:1,5:6), presenting constant scattering (flowtable) and equal to 245 ± 5 mm. Direct shear assays were done applying different normal tensions (10 kPa, 37 kPa and 50 kPa) and shear speed of 0,2 mm/min. The method allowed to identify increase of shear tensions, cohesion, friction angle and horizontal displacements as lime is added on the mixture, indicating the sensibility of the method and great potential of use to this appraisal in mortar in its fresh state. The addition of lime in traces increases the water/cement factor for the same workability in the fresh state, but in the hardened state it can increase the porosity of mortar, causing loss of RCS. Eletromicrografhs made it possible to identify the pores, the arrangements between the constituents, the roughness of the surfaces, the interface areas between materials and the crystals present in the binder paste. |
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Evaluation of the rheological coating mortar behavior by the direct shear testEvaluación del comportamiento reológico del mortero de revestimiento mediante el ensayo de cizallamiento directoAvaliação do comportamento reológico de argamassa de revestimento por meio do ensaio de cisalhamento diretoArgamassaEstado frescoCisalhamento diretoResistência à compressão simplesMicroscopia eletrônica de varredura.MortarFresh stateDirect shearResistence to simple compressionScanning electron microscopy (SEM).MorteroEstado frescoCizalla directaResistencia a la compresión simpleMicroscopía electrónica de barrido (MEB).The coating mortars behavior in its fresh state has been the object of many recent researches in Brazil. It has become, therefore, interesting the introduction of new technologies, which seek to optimize the performance of mortars, improving the knowledge of its properties, allowing a productive enforcement and minimizing, overall, future failures. The article analyzes the coating mortars’ behavior, in its fresh state, verifying the efficiency in the use of the direct shear equipment, with different combinations of traces and composing materials. Four traces of mortar were dosed, with distinct proportions of lime (TR1 = 1:0:6; TR2 = 1:0,5:6; TR3 = 1:1:6 – reference; TR4 = 1:1,5:6), presenting constant scattering (flowtable) and equal to 245 ± 5 mm. Direct shear assays were done applying different normal tensions (10 kPa, 37 kPa and 50 kPa) and shear speed of 0,2 mm/min. The method allowed to identify increase of shear tensions, cohesion, friction angle and horizontal displacements as lime is added on the mixture, indicating the sensibility of the method and great potential of use to this appraisal in mortar in its fresh state. The addition of lime in traces increases the water/cement factor for the same workability in the fresh state, but in the hardened state it can increase the porosity of mortar, causing loss of RCS. Eletromicrografhs made it possible to identify the pores, the arrangements between the constituents, the roughness of the surfaces, the interface areas between materials and the crystals present in the binder paste.El comportamiento de los morteros en estado fresco ha sido objeto de varios estudios recientes en Brasil. Por tanto, es interesante adoptar nuevas tecnologías que busquen optimizar el rendimiento de los morteros, mejorando el conocimiento de sus propiedades, permitiendo una aplicación productiva y minimizando, sobre todo, los fallos futuros. El artículo analiza el comportamiento de los morteros de revestimiento, en estado fresco, verificando la efectividad del uso de equipos de cizallamiento directo con diferentes combinaciones de trazos y materiales de composición. Se dosificaron cuatro trazas de mortero, con diferentes proporciones de cal (TR1 = 1:0:6; TR2 = 1:0,5:6; TR3 = 1:1:6 - referencia; TR4 = 1:1,5:6 ), con una extensión de flujo constante igual a 245 ± 5 mm Los ensayos de cizallamiento directo se realizaron utilizando diferentes esfuerzos normales (10 kPa, 37 kPa y 50 kPa) y una velocidad de cizallamiento de 0,2 mm/min. El método permitió identificar mayores esfuerzos cortantes, cohesión, ángulo de fricción y desplazamientos horizontales a medida que se agrega cal a la mezcla, lo que indica la sensibilidad del método y el gran potencial de su uso para esta evaluación en morteros frescos. La adición de cal a la mezcla aumenta el factor agua/cemento para la misma trabajabilidad en estado fresco, pero en estado endurecido puede aumentar la porosidad del mortero, provocando pérdida de RCS. Las electromicrografías permitieron identificar los poros, la disposición entre los componentes, la rugosidad de las superficies, las áreas de interfaz entre los materiales y los cristales presentes en la pasta aglutinante.O comportamento das argamassas no estado fresco tem sido objeto de diversas pesquisas recentes no Brasil. Torna-se, portanto, interessante a adoção de novas tecnologias que busquem otimizar o desempenho das argamassas, melhorando o conhecimento das suas propriedades, possibilitando uma aplicação produtiva e minimizando, sobretudo, futuras falhas. O artigo analisa o comportamento de argamassas de revestimento, no estado fresco, verificando a eficácia da utilização do equipamento de cisalhamento direto com diferentes combinações de traços e materiais de composição. Foram dosados quatro traços de argamassa, com proporções distintas da cal (TR1 = 1:0:6; TR2 = 1:0,5:6; TR3 = 1:1:6 – referência; TR4 = 1:1,5:6), apresentando espalhamento (flowtable) constante e igual a 245 ± 5 mm. Os ensaios de cisalhamento direto foram realizados aplicando diferentes tensões normais (10 kPa, 37 kPa e 50 kPa) e velocidade cisalhante de 0,2 mm/min. O método permitiu identificar aumento das tensões cisalhantes, coesão, ângulo de atrito e deslocamentos horizontais à medida que a cal é adicionada na mistura, indicando a sensibilidade do método e grande potencial de sua utilização para essa avaliação em argamassas em estado fresco. A adição de cal ao traço eleva o fator água/cimento para uma mesma trabalhabilidade no estado fresco, mas no estado endurecido pode aumentar a porosidade das argamassas, causando perda de RCS. As eletromicrografias permitiram identificar os poros, os arranjos entre os constituintes, a rugosidade das superfícies, as zonas de interface entre materiais e os cristais presentes na pasta-ligante.Research, Society and Development2021-01-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://rsdjournal.org/index.php/rsd/article/view/1161710.33448/rsd-v10i1.11617Research, Society and Development; Vol. 10 No. 1; e17010111617Research, Society and Development; Vol. 10 Núm. 1; e17010111617Research, Society and Development; v. 10 n. 1; e170101116172525-3409reponame:Research, Society and Developmentinstname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEIporhttps://rsdjournal.org/index.php/rsd/article/view/11617/10369Copyright (c) 2021 Ingridy Ranyelli Quitéria Sales Nascimento; Stela Fucale; Angelo Just da Costa e Silva; Aline Catia da Silva; Silvio Romero de Melo Ferreirahttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessNascimento, Ingridy Ranyelli Quitéria Sales Fucale, StelaSilva, Angelo Just da Costa eSilva, Aline Catia daFerreira, Silvio Romero de Melo 2021-02-20T21:19:23Zoai:ojs.pkp.sfu.ca:article/11617Revistahttps://rsdjournal.org/index.php/rsd/indexPUBhttps://rsdjournal.org/index.php/rsd/oairsd.articles@gmail.com2525-34092525-3409opendoar:2024-01-17T09:33:23.614463Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)false |
dc.title.none.fl_str_mv |
Evaluation of the rheological coating mortar behavior by the direct shear test Evaluación del comportamiento reológico del mortero de revestimiento mediante el ensayo de cizallamiento directo Avaliação do comportamento reológico de argamassa de revestimento por meio do ensaio de cisalhamento direto |
title |
Evaluation of the rheological coating mortar behavior by the direct shear test |
spellingShingle |
Evaluation of the rheological coating mortar behavior by the direct shear test Nascimento, Ingridy Ranyelli Quitéria Sales Argamassa Estado fresco Cisalhamento direto Resistência à compressão simples Microscopia eletrônica de varredura. Mortar Fresh state Direct shear Resistence to simple compression Scanning electron microscopy (SEM). Mortero Estado fresco Cizalla directa Resistencia a la compresión simple Microscopía electrónica de barrido (MEB). |
title_short |
Evaluation of the rheological coating mortar behavior by the direct shear test |
title_full |
Evaluation of the rheological coating mortar behavior by the direct shear test |
title_fullStr |
Evaluation of the rheological coating mortar behavior by the direct shear test |
title_full_unstemmed |
Evaluation of the rheological coating mortar behavior by the direct shear test |
title_sort |
Evaluation of the rheological coating mortar behavior by the direct shear test |
author |
Nascimento, Ingridy Ranyelli Quitéria Sales |
author_facet |
Nascimento, Ingridy Ranyelli Quitéria Sales Fucale, Stela Silva, Angelo Just da Costa e Silva, Aline Catia da Ferreira, Silvio Romero de Melo |
author_role |
author |
author2 |
Fucale, Stela Silva, Angelo Just da Costa e Silva, Aline Catia da Ferreira, Silvio Romero de Melo |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Nascimento, Ingridy Ranyelli Quitéria Sales Fucale, Stela Silva, Angelo Just da Costa e Silva, Aline Catia da Ferreira, Silvio Romero de Melo |
dc.subject.por.fl_str_mv |
Argamassa Estado fresco Cisalhamento direto Resistência à compressão simples Microscopia eletrônica de varredura. Mortar Fresh state Direct shear Resistence to simple compression Scanning electron microscopy (SEM). Mortero Estado fresco Cizalla directa Resistencia a la compresión simple Microscopía electrónica de barrido (MEB). |
topic |
Argamassa Estado fresco Cisalhamento direto Resistência à compressão simples Microscopia eletrônica de varredura. Mortar Fresh state Direct shear Resistence to simple compression Scanning electron microscopy (SEM). Mortero Estado fresco Cizalla directa Resistencia a la compresión simple Microscopía electrónica de barrido (MEB). |
description |
The coating mortars behavior in its fresh state has been the object of many recent researches in Brazil. It has become, therefore, interesting the introduction of new technologies, which seek to optimize the performance of mortars, improving the knowledge of its properties, allowing a productive enforcement and minimizing, overall, future failures. The article analyzes the coating mortars’ behavior, in its fresh state, verifying the efficiency in the use of the direct shear equipment, with different combinations of traces and composing materials. Four traces of mortar were dosed, with distinct proportions of lime (TR1 = 1:0:6; TR2 = 1:0,5:6; TR3 = 1:1:6 – reference; TR4 = 1:1,5:6), presenting constant scattering (flowtable) and equal to 245 ± 5 mm. Direct shear assays were done applying different normal tensions (10 kPa, 37 kPa and 50 kPa) and shear speed of 0,2 mm/min. The method allowed to identify increase of shear tensions, cohesion, friction angle and horizontal displacements as lime is added on the mixture, indicating the sensibility of the method and great potential of use to this appraisal in mortar in its fresh state. The addition of lime in traces increases the water/cement factor for the same workability in the fresh state, but in the hardened state it can increase the porosity of mortar, causing loss of RCS. Eletromicrografhs made it possible to identify the pores, the arrangements between the constituents, the roughness of the surfaces, the interface areas between materials and the crystals present in the binder paste. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-06 |
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 |
https://rsdjournal.org/index.php/rsd/article/view/11617 10.33448/rsd-v10i1.11617 |
url |
https://rsdjournal.org/index.php/rsd/article/view/11617 |
identifier_str_mv |
10.33448/rsd-v10i1.11617 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://rsdjournal.org/index.php/rsd/article/view/11617/10369 |
dc.rights.driver.fl_str_mv |
https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
https://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 |
Research, Society and Development |
publisher.none.fl_str_mv |
Research, Society and Development |
dc.source.none.fl_str_mv |
Research, Society and Development; Vol. 10 No. 1; e17010111617 Research, Society and Development; Vol. 10 Núm. 1; e17010111617 Research, Society and Development; v. 10 n. 1; e17010111617 2525-3409 reponame:Research, Society and Development instname:Universidade Federal de Itajubá (UNIFEI) instacron:UNIFEI |
instname_str |
Universidade Federal de Itajubá (UNIFEI) |
instacron_str |
UNIFEI |
institution |
UNIFEI |
reponame_str |
Research, Society and Development |
collection |
Research, Society and Development |
repository.name.fl_str_mv |
Research, Society and Development - Universidade Federal de Itajubá (UNIFEI) |
repository.mail.fl_str_mv |
rsd.articles@gmail.com |
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1797052744768421888 |