Evaluation of compressive strength of concrete with metakaolin using different levelling techniques
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Research, Society and Development |
Texto Completo: | https://rsdjournal.org/index.php/rsd/article/view/13341 |
Resumo: | The partial replacement of cement by mineral additions such as metakaolin has been widely applied in the production of high-strength and durable concretes due to the pozzolanic action, allowing a reduction in the consumption of cement. Tests are performed to determine the mechanical properties of these materials, such as compressive strength, for which there are different levelling techniques of specimens, such as sulphur and neoprene, indicated for different resistance classes. The present study aimed to characterize the behaviour, in the hardened state, of concrete produced with high initial strength Portland cement (CPV-ARI) and metakaolin and evaluate the different levelling methods. Three groups of samples dosed by the IPT-EPUSP method, with mix designs of 1:3, 1:5, and 1:6, and replacements of 8 and 10% of cement by metakaolin, were subjected to compressive strength test, at the ages of 28 days, with levelling by neoprene, and 90 days, with levelling by sulphur. It was observed an increase in strength with addition of metakaolin at both ages. Comparing the results in the two ages, it was verified an increase in strength for the mix designs 1:5 and 1:6 and a reduction for the mix design 1:3. Such fact can be explained by the high strengths achieved by this mix design. As the levelling method used was sulphur, it is confirmed the imprecision of results for strengths above 50 MPa with this technique. |
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Evaluation of compressive strength of concrete with metakaolin using different levelling techniquesEvaluación de la resistencia a la compresión del hormigón con metacaolín mediante diferentes técnicas de refrentadoAvaliação da resistência à compressão de concreto com metacaulim por diferentes técnicas de capeamentoConcretoResistência à compressãoMetacaulimCapeamento.HormigónResistencia a la compresiónMetacaolínMétodos de refrentado.ConcreteCompressive strengthMetakaolinLevelling methods.The partial replacement of cement by mineral additions such as metakaolin has been widely applied in the production of high-strength and durable concretes due to the pozzolanic action, allowing a reduction in the consumption of cement. Tests are performed to determine the mechanical properties of these materials, such as compressive strength, for which there are different levelling techniques of specimens, such as sulphur and neoprene, indicated for different resistance classes. The present study aimed to characterize the behaviour, in the hardened state, of concrete produced with high initial strength Portland cement (CPV-ARI) and metakaolin and evaluate the different levelling methods. Three groups of samples dosed by the IPT-EPUSP method, with mix designs of 1:3, 1:5, and 1:6, and replacements of 8 and 10% of cement by metakaolin, were subjected to compressive strength test, at the ages of 28 days, with levelling by neoprene, and 90 days, with levelling by sulphur. It was observed an increase in strength with addition of metakaolin at both ages. Comparing the results in the two ages, it was verified an increase in strength for the mix designs 1:5 and 1:6 and a reduction for the mix design 1:3. Such fact can be explained by the high strengths achieved by this mix design. As the levelling method used was sulphur, it is confirmed the imprecision of results for strengths above 50 MPa with this technique.La adición o sustitución parcial de cemento por adiciones minerales como el metacaolín ha sido ampliamente utilizada en la producción de hormigón de alta resistencia y durabilidad, debido a su acción puzolánica, que permite la reducción del consumo de cemento. La determinación de las propiedades mecánicas de estos materiales se realiza mediante ensayos, como la resistencia a la compresión. Para esta prueba, existen diferentes técnicas de refrentado para probetas, como azufre y neopreno, indicadas para diferentes clases de resistencia. El presente estudio tuvo como objetivo principal caracterizar el comportamiento, en estado endurecido, del hormigón producido con cemento Portland de alta resistencia inicial (CPV-ARI) y metacaolín, y evaluar diferentes métodos de refrentado. Tres grupos de probetas dosificadas por el método IPT-EPUSP, con mezclas 1: 3, 1: 5 y 1: 6, y sustituciones de cemento al 8 y 10% por metacaolín, fueron sometidos a un ensayo de resistencia a la compresión a las edades de 28 días, con refrentado de neopreno, y 90 días, con azufre. Se observó un aumento de la resistencia con la adición de metacaolín, tanto a los 28 como a los 90 días. Al comparar los resultados en las dos edades, hubo un aumento en la resistencia para las mezclas 1: 5 y 1: 6 y una reducción para la mezcla 1: 3. Esto puede explicarse por la alta resistencia lograda por esta mezcla. Como el método de refrentado utilizado fue el azufre, se confirma la inexactitud de los resultados para resistencias superiores a 50 MPa.A adição ou substituição de cimento de modo parcial por adições minerais como o metacaulim tem sido amplamente utilizada na produção de concretos de alta resistência e durabilidade, devido a sua ação pozolânica, permitindo a redução do consumo de cimento. A determinação de propriedades mecânicas para estes materiais é feita através da realização de ensaios, tais como o de resistência à compressão, para o qual há diferentes técnicas de capeamento de corpos de prova, como o enxofre e o neoprene, indicados para diferentes classes de resistência. O presente estudo teve como principal objetivo caracterizar o comportamento, no estado endurecido, de concreto produzido com cimento Portland de alta resistência inicial (CPV-ARI) e metacaulim além de avaliar diferentes métodos de capeamento. Três grupos de amostras dosadas pelo método do IPT-EPUSP, com traços 1:3, 1:5 e 1:6, e substituições de 8 e 10% de cimento por metacaulim, foram submetidos a ensaio de resistência à compressão, nas idades de 28 dias, com capeamento por neoprene, e 90 dias, por enxofre. Observou-se aumento na resistência com a adição de metacaulim, tanto aos 28 quanto aos 90 dias. Comparando-se os resultados nas duas idades, notou-se um aumento na resistência para os traços 1:5 e 1:6 e uma redução para o traço 1:3. Tal fato pode ser explicado pelas altas resistências alcançadas por esse traço. Como o método de capeamento utilizado foi o enxofre, confirma-se sua imprecisão de resultados para resistências acima de 50 MPa.Research, Society and Development2021-03-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://rsdjournal.org/index.php/rsd/article/view/1334110.33448/rsd-v10i3.13341Research, Society and Development; Vol. 10 No. 3; e31510313341Research, Society and Development; Vol. 10 Núm. 3; e31510313341Research, Society and Development; v. 10 n. 3; e315103133412525-3409reponame:Research, Society and Developmentinstname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEIenghttps://rsdjournal.org/index.php/rsd/article/view/13341/12025Copyright (c) 2021 Ayrton Wagner dos Santos Gomes de Sá; Yane Coutinho; Renan Gustavo Pacheco Soares; Fernanda Cavalcanti Ferreira; Arnaldo Manoel Pereira Carneirohttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessSá, Ayrton Wagner dos Santos Gomes de Coutinho, YaneSoares, Renan Gustavo Pacheco Ferreira, Fernanda Cavalcanti Carneiro, Arnaldo Manoel Pereira 2021-03-28T12:03:35Zoai:ojs.pkp.sfu.ca:article/13341Revistahttps://rsdjournal.org/index.php/rsd/indexPUBhttps://rsdjournal.org/index.php/rsd/oairsd.articles@gmail.com2525-34092525-3409opendoar:2024-01-17T09:34:42.359285Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)false |
dc.title.none.fl_str_mv |
Evaluation of compressive strength of concrete with metakaolin using different levelling techniques Evaluación de la resistencia a la compresión del hormigón con metacaolín mediante diferentes técnicas de refrentado Avaliação da resistência à compressão de concreto com metacaulim por diferentes técnicas de capeamento |
title |
Evaluation of compressive strength of concrete with metakaolin using different levelling techniques |
spellingShingle |
Evaluation of compressive strength of concrete with metakaolin using different levelling techniques Sá, Ayrton Wagner dos Santos Gomes de Concreto Resistência à compressão Metacaulim Capeamento. Hormigón Resistencia a la compresión Metacaolín Métodos de refrentado. Concrete Compressive strength Metakaolin Levelling methods. |
title_short |
Evaluation of compressive strength of concrete with metakaolin using different levelling techniques |
title_full |
Evaluation of compressive strength of concrete with metakaolin using different levelling techniques |
title_fullStr |
Evaluation of compressive strength of concrete with metakaolin using different levelling techniques |
title_full_unstemmed |
Evaluation of compressive strength of concrete with metakaolin using different levelling techniques |
title_sort |
Evaluation of compressive strength of concrete with metakaolin using different levelling techniques |
author |
Sá, Ayrton Wagner dos Santos Gomes de |
author_facet |
Sá, Ayrton Wagner dos Santos Gomes de Coutinho, Yane Soares, Renan Gustavo Pacheco Ferreira, Fernanda Cavalcanti Carneiro, Arnaldo Manoel Pereira |
author_role |
author |
author2 |
Coutinho, Yane Soares, Renan Gustavo Pacheco Ferreira, Fernanda Cavalcanti Carneiro, Arnaldo Manoel Pereira |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Sá, Ayrton Wagner dos Santos Gomes de Coutinho, Yane Soares, Renan Gustavo Pacheco Ferreira, Fernanda Cavalcanti Carneiro, Arnaldo Manoel Pereira |
dc.subject.por.fl_str_mv |
Concreto Resistência à compressão Metacaulim Capeamento. Hormigón Resistencia a la compresión Metacaolín Métodos de refrentado. Concrete Compressive strength Metakaolin Levelling methods. |
topic |
Concreto Resistência à compressão Metacaulim Capeamento. Hormigón Resistencia a la compresión Metacaolín Métodos de refrentado. Concrete Compressive strength Metakaolin Levelling methods. |
description |
The partial replacement of cement by mineral additions such as metakaolin has been widely applied in the production of high-strength and durable concretes due to the pozzolanic action, allowing a reduction in the consumption of cement. Tests are performed to determine the mechanical properties of these materials, such as compressive strength, for which there are different levelling techniques of specimens, such as sulphur and neoprene, indicated for different resistance classes. The present study aimed to characterize the behaviour, in the hardened state, of concrete produced with high initial strength Portland cement (CPV-ARI) and metakaolin and evaluate the different levelling methods. Three groups of samples dosed by the IPT-EPUSP method, with mix designs of 1:3, 1:5, and 1:6, and replacements of 8 and 10% of cement by metakaolin, were subjected to compressive strength test, at the ages of 28 days, with levelling by neoprene, and 90 days, with levelling by sulphur. It was observed an increase in strength with addition of metakaolin at both ages. Comparing the results in the two ages, it was verified an increase in strength for the mix designs 1:5 and 1:6 and a reduction for the mix design 1:3. Such fact can be explained by the high strengths achieved by this mix design. As the levelling method used was sulphur, it is confirmed the imprecision of results for strengths above 50 MPa with this technique. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-03-17 |
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/13341 10.33448/rsd-v10i3.13341 |
url |
https://rsdjournal.org/index.php/rsd/article/view/13341 |
identifier_str_mv |
10.33448/rsd-v10i3.13341 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://rsdjournal.org/index.php/rsd/article/view/13341/12025 |
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. 3; e31510313341 Research, Society and Development; Vol. 10 Núm. 3; e31510313341 Research, Society and Development; v. 10 n. 3; e31510313341 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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1797052672333840384 |