Obtenção e caracterização de cimentos sulfobelíticos sintetizados a partir do resíduo de bauxita

Detalhes bibliográficos
Autor(a) principal: Fortes, Gustavo Mattos
Data de Publicação: 2013
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional da UFSCAR
Texto Completo: https://repositorio.ufscar.br/handle/ufscar/909
Resumo: The modern society has an elevated and increasingly pattern of consumption, demanding a high industrial productivity and generating enormous residue volumes, resulting in a conduct that is becoming each time more unsustainable. The bauxite residue (BR), also known as red mud, is the residue of biggest generation by the aluminum industry, being stocked in large impermeable deposits, being this way the passive of the highest management cost for this industrial sector. Only in Brazil the minimum estimative of BR generation is of 10.7 million tons/year. Nevertheless, the BR, although alkaline, is composed by fine particles rich in iron, aluminum and silicon oxides, consisting therefore in a raw material of possible interests for many applications in traditional ceramics, mainly in civil construction. In this alternative, the use of BR, as a raw material, in the development of new sulfobelite cements for civil construction shows itself very attractive. These cements are characterized by the calcium sulfoaluminate phase (C4A3S), higher contents of belite (β-C2S) and calcium ferrialuminate (C4AF), as well as the absence of alite (C3S). Due to this composition these cements have been showing economic-environmental, and possibly even technical, advantages over Portland cement. From their benefits, highlights a reduction of 30% to 62% on equivalent CO2 emissions, as for less limestone used, as well as, lower burning temperature, bringing also energy reduction in the process. The sulfobelite clinker was synthesized using the raw materials: limestone, commercial gypsum, BR and São Simão clay. Using expressive BR content, up to 11.2wt%; understanding the influence of Al2O3/Fe2O3 (A/F) ratio; and gypsum additions; for the synthesis of sulfobelite cements it was possible to develop satisfactory formulations. These sulfobelite cement formulations presented apparent porosity and mechanical strength equivalent to commercial Portland cement (CPII-Z32 and CPV-ARI), else than the formation of hydration products similar to a commercial calcium sulfoaluminato cement.
id SCAR_46fc3d690e7238f81fd0197f17ee6788
oai_identifier_str oai:repositorio.ufscar.br:ufscar/909
network_acronym_str SCAR
network_name_str Repositório Institucional da UFSCAR
repository_id_str 4322
spelling Fortes, Gustavo MattosRodrigues, José de Anchietahttp://genos.cnpq.br:12010/dwlattes/owa/prc_imp_cv_int?f_cod=K4783623T3http://lattes.cnpq.br/7377968371938316da6a2e08-37c4-4a64-ab70-3729a9ac9dd42016-06-02T19:12:31Z2013-10-172016-06-02T19:12:31Z2013-03-18https://repositorio.ufscar.br/handle/ufscar/909The modern society has an elevated and increasingly pattern of consumption, demanding a high industrial productivity and generating enormous residue volumes, resulting in a conduct that is becoming each time more unsustainable. The bauxite residue (BR), also known as red mud, is the residue of biggest generation by the aluminum industry, being stocked in large impermeable deposits, being this way the passive of the highest management cost for this industrial sector. Only in Brazil the minimum estimative of BR generation is of 10.7 million tons/year. Nevertheless, the BR, although alkaline, is composed by fine particles rich in iron, aluminum and silicon oxides, consisting therefore in a raw material of possible interests for many applications in traditional ceramics, mainly in civil construction. In this alternative, the use of BR, as a raw material, in the development of new sulfobelite cements for civil construction shows itself very attractive. These cements are characterized by the calcium sulfoaluminate phase (C4A3S), higher contents of belite (β-C2S) and calcium ferrialuminate (C4AF), as well as the absence of alite (C3S). Due to this composition these cements have been showing economic-environmental, and possibly even technical, advantages over Portland cement. From their benefits, highlights a reduction of 30% to 62% on equivalent CO2 emissions, as for less limestone used, as well as, lower burning temperature, bringing also energy reduction in the process. The sulfobelite clinker was synthesized using the raw materials: limestone, commercial gypsum, BR and São Simão clay. Using expressive BR content, up to 11.2wt%; understanding the influence of Al2O3/Fe2O3 (A/F) ratio; and gypsum additions; for the synthesis of sulfobelite cements it was possible to develop satisfactory formulations. These sulfobelite cement formulations presented apparent porosity and mechanical strength equivalent to commercial Portland cement (CPII-Z32 and CPV-ARI), else than the formation of hydration products similar to a commercial calcium sulfoaluminato cement.A sociedade moderna tem um elevado e crescente padrão de consumo, demandando alta produtividade industrial e gerando enormes volumes de resíduos, resultando em uma conduta que vêm se tornando cada vez mais insustentável. O resíduo de bauxita (RB), também conhecido por lama vermelha, é o resíduo da indústria do alumínio de maior geração que é estocado em grandes depósitos impermeáveis, tornando-se assim o passivo de gerenciamento mais caro para essa indústria. Somente no Brasil a estimativa mínima de geração do RB é de 10,7 milhões de toneladas/ano. Contudo, o RB, apesar de ser alcalino, é composto de finas partículas ricas em óxidos de ferro, alumínio e silício, constituindo assim uma matéria-prima possivelmente interessante para diversas aplicações em produtos cerâmicos tradicionais, sobretudo na construção civil. Dentro desta alternativa, o uso de RB, como matéria-prima, no desenvolvimento de novos cimentos sulfobelíticos para a construção civil se mostra bastante atrativo. Estes cimentos se caracterizam pela fase de sulfoaluminato de cálcio (C4A3S), maiores teores de belita (β-C2S) e ferroaluminato de cálcio (C4AF), assim como a ausência de alita (C3S). Decorrente desta composição estes cimentos têm apresentado vantagens econômico-ambientais e possivelmente até técnicas, quando comparados ao cimento Portland. Dentre estes benefícios, destaca-se a redução de 30% a 62% na emissão de CO2-equivalente, tanto pelo menor uso de calcário como pela menor temperatura de queima, trazendo também economia energética ao processo. O clínquer sulfobelítico foi sintetizado empregando as matérias-primas: calcário calcítico, gesso comercial, RB e argila São Simão. Utilizando teores expressivos de RB, de até 11,2%-p; compreendendo a influência da relação Al2O3/Fe2O3 (A/F); e adições de gesso; para a síntese do cimento sulfobelítico, foi possível desenvolver formulações satisfatórias. Estas formulações de cimento sulfobelítico apresentaram, porosidade aparente e resistência mecânica equivalentes a cimentos Portland comerciais (CPII-Z32 e CPV-ARI), além da formação de produtos de hidratação semelhante ao um cimento de sulfoaluminato de cálcio comercial.Universidade Federal de Sao Carlosapplication/pdfporUniversidade Federal de São CarlosPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMUFSCarBRCimentoCimentos especiaisCimentos sulfobelíticosLama vermelhaResíduo de bauxitaSulfoaluminato de cálcioENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICAObtenção e caracterização de cimentos sulfobelíticos sintetizados a partir do resíduo de bauxitaSynthesis and characterization of sulfobelitic cements made with red mud abstractinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-1-1eeac44e3-9996-464a-9f4c-724ff89d3f23info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINAL5513.pdfapplication/pdf6669957https://repositorio.ufscar.br/bitstream/ufscar/909/1/5513.pdf9c1ffbe8118424982113968037eabd18MD51TEXT5513.pdf.txt5513.pdf.txtExtracted texttext/plain0https://repositorio.ufscar.br/bitstream/ufscar/909/2/5513.pdf.txtd41d8cd98f00b204e9800998ecf8427eMD52THUMBNAIL5513.pdf.jpg5513.pdf.jpgIM Thumbnailimage/jpeg6161https://repositorio.ufscar.br/bitstream/ufscar/909/3/5513.pdf.jpg5077cf111b1912b33b08926cbbb92e56MD53ufscar/9092023-09-18 18:31:28.308oai:repositorio.ufscar.br:ufscar/909Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:31:28Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false
dc.title.por.fl_str_mv Obtenção e caracterização de cimentos sulfobelíticos sintetizados a partir do resíduo de bauxita
dc.title.alternative.eng.fl_str_mv Synthesis and characterization of sulfobelitic cements made with red mud abstract
title Obtenção e caracterização de cimentos sulfobelíticos sintetizados a partir do resíduo de bauxita
spellingShingle Obtenção e caracterização de cimentos sulfobelíticos sintetizados a partir do resíduo de bauxita
Fortes, Gustavo Mattos
Cimento
Cimentos especiais
Cimentos sulfobelíticos
Lama vermelha
Resíduo de bauxita
Sulfoaluminato de cálcio
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
title_short Obtenção e caracterização de cimentos sulfobelíticos sintetizados a partir do resíduo de bauxita
title_full Obtenção e caracterização de cimentos sulfobelíticos sintetizados a partir do resíduo de bauxita
title_fullStr Obtenção e caracterização de cimentos sulfobelíticos sintetizados a partir do resíduo de bauxita
title_full_unstemmed Obtenção e caracterização de cimentos sulfobelíticos sintetizados a partir do resíduo de bauxita
title_sort Obtenção e caracterização de cimentos sulfobelíticos sintetizados a partir do resíduo de bauxita
author Fortes, Gustavo Mattos
author_facet Fortes, Gustavo Mattos
author_role author
dc.contributor.authorlattes.por.fl_str_mv http://lattes.cnpq.br/7377968371938316
dc.contributor.author.fl_str_mv Fortes, Gustavo Mattos
dc.contributor.advisor1.fl_str_mv Rodrigues, José de Anchieta
dc.contributor.advisor1Lattes.fl_str_mv http://genos.cnpq.br:12010/dwlattes/owa/prc_imp_cv_int?f_cod=K4783623T3
dc.contributor.authorID.fl_str_mv da6a2e08-37c4-4a64-ab70-3729a9ac9dd4
contributor_str_mv Rodrigues, José de Anchieta
dc.subject.por.fl_str_mv Cimento
Cimentos especiais
Cimentos sulfobelíticos
Lama vermelha
Resíduo de bauxita
Sulfoaluminato de cálcio
topic Cimento
Cimentos especiais
Cimentos sulfobelíticos
Lama vermelha
Resíduo de bauxita
Sulfoaluminato de cálcio
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
dc.subject.cnpq.fl_str_mv ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
description The modern society has an elevated and increasingly pattern of consumption, demanding a high industrial productivity and generating enormous residue volumes, resulting in a conduct that is becoming each time more unsustainable. The bauxite residue (BR), also known as red mud, is the residue of biggest generation by the aluminum industry, being stocked in large impermeable deposits, being this way the passive of the highest management cost for this industrial sector. Only in Brazil the minimum estimative of BR generation is of 10.7 million tons/year. Nevertheless, the BR, although alkaline, is composed by fine particles rich in iron, aluminum and silicon oxides, consisting therefore in a raw material of possible interests for many applications in traditional ceramics, mainly in civil construction. In this alternative, the use of BR, as a raw material, in the development of new sulfobelite cements for civil construction shows itself very attractive. These cements are characterized by the calcium sulfoaluminate phase (C4A3S), higher contents of belite (β-C2S) and calcium ferrialuminate (C4AF), as well as the absence of alite (C3S). Due to this composition these cements have been showing economic-environmental, and possibly even technical, advantages over Portland cement. From their benefits, highlights a reduction of 30% to 62% on equivalent CO2 emissions, as for less limestone used, as well as, lower burning temperature, bringing also energy reduction in the process. The sulfobelite clinker was synthesized using the raw materials: limestone, commercial gypsum, BR and São Simão clay. Using expressive BR content, up to 11.2wt%; understanding the influence of Al2O3/Fe2O3 (A/F) ratio; and gypsum additions; for the synthesis of sulfobelite cements it was possible to develop satisfactory formulations. These sulfobelite cement formulations presented apparent porosity and mechanical strength equivalent to commercial Portland cement (CPII-Z32 and CPV-ARI), else than the formation of hydration products similar to a commercial calcium sulfoaluminato cement.
publishDate 2013
dc.date.available.fl_str_mv 2013-10-17
2016-06-02T19:12:31Z
dc.date.issued.fl_str_mv 2013-03-18
dc.date.accessioned.fl_str_mv 2016-06-02T19:12:31Z
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.uri.fl_str_mv https://repositorio.ufscar.br/handle/ufscar/909
url https://repositorio.ufscar.br/handle/ufscar/909
dc.language.iso.fl_str_mv por
language por
dc.relation.confidence.fl_str_mv -1
-1
dc.relation.authority.fl_str_mv eeac44e3-9996-464a-9f4c-724ff89d3f23
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de São Carlos
dc.publisher.program.fl_str_mv Programa de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEM
dc.publisher.initials.fl_str_mv UFSCar
dc.publisher.country.fl_str_mv BR
publisher.none.fl_str_mv Universidade Federal de São Carlos
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFSCAR
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:UFSCAR
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str UFSCAR
institution UFSCAR
reponame_str Repositório Institucional da UFSCAR
collection Repositório Institucional da UFSCAR
bitstream.url.fl_str_mv https://repositorio.ufscar.br/bitstream/ufscar/909/1/5513.pdf
https://repositorio.ufscar.br/bitstream/ufscar/909/2/5513.pdf.txt
https://repositorio.ufscar.br/bitstream/ufscar/909/3/5513.pdf.jpg
bitstream.checksum.fl_str_mv 9c1ffbe8118424982113968037eabd18
d41d8cd98f00b204e9800998ecf8427e
5077cf111b1912b33b08926cbbb92e56
bitstream.checksumAlgorithm.fl_str_mv MD5
MD5
MD5
repository.name.fl_str_mv Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv
_version_ 1802136247913676800