Gesso para a construção civil reforçado com nanocargas de óxido de grafeno
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações da UFRPE |
Texto Completo: | http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8672 |
Resumo: | The use of gypsum in building construction has shown significant growth, being a lowcost and easy-to-handle material. Graphene oxide (GO), a material derived from graphite powder, has been extensively studied in the scientific community and applied in the building construction as a filler in cementitious materials, creating more resistant composites. Among the methods for obtaining GO, the modified Hummers method stands out, because of its accessible precursor raw material (graphite), high yield, and water processability, making it more suitable for using in composites. We proposed the reinforcement of casting plaster, used for making blocks, by nanofillers of graphene oxide (OG) - obtained from graphite by the modified Hummers method - in the percentages 0.005%, 0.01%, 0.03 %, 0.05% and 0.10% by mass, aiming at improvements in their mechanical and physical properties. In the morphological and structural analysis of graphene oxide, the following characterization techniques were used: X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The same characterization techniques were used on the reference gypsum (without OG addition) and on the OG-reinforced gypsum composites. The physical and mechanical properties (surface hardness, compressive strength, and flexural strength) of the reference gypsum and composites were obtained from the parameters and tests proposed in NBR's 13207, 12127, 12128, 12129 and 13279. The workability of gypsum paste is reduced with the gradual addition of OG (% by mass). The graphene oxide reinforced gypsum shows optimum improvement in the mechanical properties at 0.01 wt.%, with a 13.40% increase in compressive strength in the water/gypsum ratio 0.65, and increases, in the water/gypsum ratio 0.50, of 8.90% in compressive strength, 3.50% in hardness and 22.60% in flexural strength. However, with further gradual increase in the amount of GO, the resistance is gradually reduced to lower values as compared to the reference plaster. |
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GHISLANDI, Marcos GomesPÓVOAS, Yêda VieiraHOLANDA, Romildo Morant dehttp://lattes.cnpq.br/6958656251922778COSTA, Monaira Cristiane Alcides da2022-09-28T16:09:42Z2022-07-28COSTA, Monaira Cristiane Alcides da. Gesso para a construção civil reforçado com nanocargas de óxido de grafeno. 2022. 77 f. Dissertação (Programa de Pós-Graduação em Engenharia Física) - Universidade Federal Rural de Pernambuco, Cabo de Santo Agostinho.http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8672The use of gypsum in building construction has shown significant growth, being a lowcost and easy-to-handle material. Graphene oxide (GO), a material derived from graphite powder, has been extensively studied in the scientific community and applied in the building construction as a filler in cementitious materials, creating more resistant composites. Among the methods for obtaining GO, the modified Hummers method stands out, because of its accessible precursor raw material (graphite), high yield, and water processability, making it more suitable for using in composites. We proposed the reinforcement of casting plaster, used for making blocks, by nanofillers of graphene oxide (OG) - obtained from graphite by the modified Hummers method - in the percentages 0.005%, 0.01%, 0.03 %, 0.05% and 0.10% by mass, aiming at improvements in their mechanical and physical properties. In the morphological and structural analysis of graphene oxide, the following characterization techniques were used: X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The same characterization techniques were used on the reference gypsum (without OG addition) and on the OG-reinforced gypsum composites. The physical and mechanical properties (surface hardness, compressive strength, and flexural strength) of the reference gypsum and composites were obtained from the parameters and tests proposed in NBR's 13207, 12127, 12128, 12129 and 13279. The workability of gypsum paste is reduced with the gradual addition of OG (% by mass). The graphene oxide reinforced gypsum shows optimum improvement in the mechanical properties at 0.01 wt.%, with a 13.40% increase in compressive strength in the water/gypsum ratio 0.65, and increases, in the water/gypsum ratio 0.50, of 8.90% in compressive strength, 3.50% in hardness and 22.60% in flexural strength. However, with further gradual increase in the amount of GO, the resistance is gradually reduced to lower values as compared to the reference plaster.A utilização do gesso na construção civil tem apresentado crescimento expressivo, por ser um material de baixo custo e fácil manipulação. O óxido de grafeno (OG), material proveniente do pó de grafite, vem sendo bastante estudado no meio científico e aplicado na construção civil sob a forma de nanocarga em materiais cimentícios, resultando em compósitos mais resistentes. Entre os métodos de obtenção do OG, destaca-se o método de Hummers modificado, que possui matéria prima precursora acessível (grafite), alto rendimento e processabilidade em água, o que o torna mais adequado para a utilização em compósitos. Este trabalho propôs o reforço do gesso de fundição, utilizado para confecção de blocos, com nanocargas de óxido de grafeno (OG) - obtido a partir do grafite pelo método de Hummers modificado - nas porcentagens 0,005%, 0,01%, 0,03%, 0,05% e 0,10% em massa, visando melhorias em suas propriedades mecânicas e físicas. Na análise morfológica e estrutural do óxido de grafeno foram utilizadas as técnicas de caracterização: Difração de Raio-X (DRX), Microscopia Eletrônica de Varredura (MEV) e Espectroscopia no Infravermelho por Transformada de Fourier (FTIR). As mesmas técnicas de caracterização foram utilizadas no gesso de referência (sem adição de OG) e nos compósitos de gesso reforçados com OG. As propriedades físicas e mecânicas (dureza superficial, resistência à compressão e resistência à flexão) do gesso de referência e compósitos foram obtidas a partir dos parâmetros e ensaios propostos nas NBR’s 13207, 12127, 12128, 12129 e 13279. A trabalhabilidade da pasta de gesso é reduzida com a adição gradativa de OG (% em massa). O gesso reforçado com óxido de grafeno apresenta melhoria significativa em suas propriedades mecânicas no percentual ótimo de 0,01% em massa, com aumento de 13,40% na resistência à compressão na relação de água/gesso 0,65 e aumentos, na relação de água/gesso 0,50, de 8,90% na resistência à compressão, 3,50% na dureza e 22,60% na resistência à flexão. No entanto, com o aumento, acima do ótimo, na quantidade de OG, a resistência decresce gradativamente até a sua diminuição em relação ao gesso de referência.Submitted by Mario BC (mario@bc.ufrpe.br) on 2022-09-28T16:09:42Z No. of bitstreams: 1 Monaira Cristiane Alcides da Costa.pdf: 2646069 bytes, checksum: 69ef2f1bd43a58dfb0c98fb8714275e6 (MD5)Made available in DSpace on 2022-09-28T16:09:42Z (GMT). No. of bitstreams: 1 Monaira Cristiane Alcides da Costa.pdf: 2646069 bytes, checksum: 69ef2f1bd43a58dfb0c98fb8714275e6 (MD5) Previous issue date: 2022-07-28application/pdfporUniversidade Federal Rural de PernambucoPrograma de Pós-Graduação em Engenharia FísicaUFRPEBrasilUnidade Acadêmica do Cabo de Santo AgostinhoGessoConstrução civilÓxido de grafenoGesso de fundiçãoENGENHARIASGesso para a construção civil reforçado com nanocargas de óxido de grafenoinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-761962378915184685860060060014368776284275036114518971056484826825info:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UFRPEinstname:Universidade Federal Rural de Pernambuco (UFRPE)instacron:UFRPEORIGINALMonaira Cristiane Alcides da Costa.pdfMonaira Cristiane Alcides da Costa.pdfapplication/pdf2646069http://www.tede2.ufrpe.br:8080/tede2/bitstream/tede2/8672/2/Monaira+Cristiane+Alcides+da+Costa.pdf69ef2f1bd43a58dfb0c98fb8714275e6MD52LICENSElicense.txtlicense.txttext/plain; charset=utf-82165http://www.tede2.ufrpe.br:8080/tede2/bitstream/tede2/8672/1/license.txtbd3efa91386c1718a7f26a329fdcb468MD51tede2/86722022-09-28 13:09:42.489oai:tede2: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Biblioteca Digital de Teses e Dissertaçõeshttp://www.tede2.ufrpe.br:8080/tede/PUBhttp://www.tede2.ufrpe.br:8080/oai/requestbdtd@ufrpe.br ||bdtd@ufrpe.bropendoar:2024-05-28T12:37:17.055850Biblioteca Digital de Teses e Dissertações da UFRPE - Universidade Federal Rural de Pernambuco (UFRPE)false |
dc.title.por.fl_str_mv |
Gesso para a construção civil reforçado com nanocargas de óxido de grafeno |
title |
Gesso para a construção civil reforçado com nanocargas de óxido de grafeno |
spellingShingle |
Gesso para a construção civil reforçado com nanocargas de óxido de grafeno COSTA, Monaira Cristiane Alcides da Gesso Construção civil Óxido de grafeno Gesso de fundição ENGENHARIAS |
title_short |
Gesso para a construção civil reforçado com nanocargas de óxido de grafeno |
title_full |
Gesso para a construção civil reforçado com nanocargas de óxido de grafeno |
title_fullStr |
Gesso para a construção civil reforçado com nanocargas de óxido de grafeno |
title_full_unstemmed |
Gesso para a construção civil reforçado com nanocargas de óxido de grafeno |
title_sort |
Gesso para a construção civil reforçado com nanocargas de óxido de grafeno |
author |
COSTA, Monaira Cristiane Alcides da |
author_facet |
COSTA, Monaira Cristiane Alcides da |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
GHISLANDI, Marcos Gomes |
dc.contributor.referee1.fl_str_mv |
PÓVOAS, Yêda Vieira |
dc.contributor.referee2.fl_str_mv |
HOLANDA, Romildo Morant de |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/6958656251922778 |
dc.contributor.author.fl_str_mv |
COSTA, Monaira Cristiane Alcides da |
contributor_str_mv |
GHISLANDI, Marcos Gomes PÓVOAS, Yêda Vieira HOLANDA, Romildo Morant de |
dc.subject.por.fl_str_mv |
Gesso Construção civil Óxido de grafeno Gesso de fundição |
topic |
Gesso Construção civil Óxido de grafeno Gesso de fundição ENGENHARIAS |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS |
description |
The use of gypsum in building construction has shown significant growth, being a lowcost and easy-to-handle material. Graphene oxide (GO), a material derived from graphite powder, has been extensively studied in the scientific community and applied in the building construction as a filler in cementitious materials, creating more resistant composites. Among the methods for obtaining GO, the modified Hummers method stands out, because of its accessible precursor raw material (graphite), high yield, and water processability, making it more suitable for using in composites. We proposed the reinforcement of casting plaster, used for making blocks, by nanofillers of graphene oxide (OG) - obtained from graphite by the modified Hummers method - in the percentages 0.005%, 0.01%, 0.03 %, 0.05% and 0.10% by mass, aiming at improvements in their mechanical and physical properties. In the morphological and structural analysis of graphene oxide, the following characterization techniques were used: X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The same characterization techniques were used on the reference gypsum (without OG addition) and on the OG-reinforced gypsum composites. The physical and mechanical properties (surface hardness, compressive strength, and flexural strength) of the reference gypsum and composites were obtained from the parameters and tests proposed in NBR's 13207, 12127, 12128, 12129 and 13279. The workability of gypsum paste is reduced with the gradual addition of OG (% by mass). The graphene oxide reinforced gypsum shows optimum improvement in the mechanical properties at 0.01 wt.%, with a 13.40% increase in compressive strength in the water/gypsum ratio 0.65, and increases, in the water/gypsum ratio 0.50, of 8.90% in compressive strength, 3.50% in hardness and 22.60% in flexural strength. However, with further gradual increase in the amount of GO, the resistance is gradually reduced to lower values as compared to the reference plaster. |
publishDate |
2022 |
dc.date.accessioned.fl_str_mv |
2022-09-28T16:09:42Z |
dc.date.issued.fl_str_mv |
2022-07-28 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/masterThesis |
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dc.identifier.citation.fl_str_mv |
COSTA, Monaira Cristiane Alcides da. Gesso para a construção civil reforçado com nanocargas de óxido de grafeno. 2022. 77 f. Dissertação (Programa de Pós-Graduação em Engenharia Física) - Universidade Federal Rural de Pernambuco, Cabo de Santo Agostinho. |
dc.identifier.uri.fl_str_mv |
http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8672 |
identifier_str_mv |
COSTA, Monaira Cristiane Alcides da. Gesso para a construção civil reforçado com nanocargas de óxido de grafeno. 2022. 77 f. Dissertação (Programa de Pós-Graduação em Engenharia Física) - Universidade Federal Rural de Pernambuco, Cabo de Santo Agostinho. |
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Universidade Federal Rural de Pernambuco |
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