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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/60786
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dc.creatorIgor Crego Ferreirapt_BR
dc.creatorRoberto Galérypt_BR
dc.creatorAndréia Bicalho Henriquespt_BR
dc.creatorAna Paula de Carvalho Teixeirapt_BR
dc.creatorCaroline Duarte Pratespt_BR
dc.creatorAthos Silva Limapt_BR
dc.creatorIsnaldi Rodrigues de Souza Filhopt_BR
dc.date.accessioned2023-11-10T18:16:21Z-
dc.date.available2023-11-10T18:16:21Z-
dc.date.issued2022-
dc.citation.volume18pt_BR
dc.citation.spage4194pt_BR
dc.citation.epage4200pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.jmrt.2022.03.192pt_BR
dc.identifier.issn2238-7854pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/60786-
dc.description.resumoMining tailings are becoming more and more abundant and consequently it has been shown to be a material of great concern, especially after the dam failures in Brazil, Bento Rodrigues, 2015 and Brumadinho, 2019. In this work, iron ore tailings (IOT) were used as an aggregate in the production of geopolymers based on metakaolin used as a precursor and activated in alkaline solution. The alkaline solution was produced from a commercial solution of sodium silicate Na2SiO3 (SS) and a 10 M solution of sodium hydroxide NaOH (SH) prepared from solid flakes (3:1 mass ratio of SS:SH). Two syntheses were carried out, one by mixing metakaolin (MK) with the activator solution (AS) (1:1 mass ratio of MK:AS), called matrix, and another with the addition of aggregate (AG) to the matrix (1:1:2 mass ratio of MK:AS:AG), called geopolymer. XRD, FTIR, Mössbauer and SEM were used to analyze the inputs and materials produced, in addition to the analysis of compressive strength. The matrix reached a strength of 45.88 MPa with 7 days of curing, while the addition of IOT generated an increase in strength to the material, reaching values between 59.59 and 64.90 MPa also with 7 days of curing.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Geraispt_BR
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.description.sponsorshipOutra Agênciapt_BR
dc.format.mimetypepdfpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA MINASpt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE QUÍMICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofJournal of Materials Research and Technologypt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectIron ore tailingspt_BR
dc.subjectMetakaolinpt_BR
dc.subjectGeopolymerpt_BR
dc.subjectAlkaline activated materialpt_BR
dc.subject.otherMinerios de ferropt_BR
dc.subject.otherRefugos (Metalurgia)pt_BR
dc.subject.otherÓxidos de ferropt_BR
dc.subject.otherMagnetitapt_BR
dc.subject.otherHematitapt_BR
dc.subject.otherResíduospt_BR
dc.subject.otherHidróxidospt_BR
dc.subject.otherSilicatospt_BR
dc.subject.otherRaios X - Difraçãopt_BR
dc.subject.otherCaulinitapt_BR
dc.subject.otherFourier, Espectroscopia de infravermelho por transformada dept_BR
dc.subject.otherMossbauer, Espectroscopia dept_BR
dc.subject.otherMicroscopia eletrônicapt_BR
dc.subject.otherCompósitos poliméricospt_BR
dc.subject.otherCimentopt_BR
dc.subject.otherFerro - Minas e mineraçãopt_BR
dc.titleReuse of iron ore tailings for production of metakaolin-based geopolymerspt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.sciencedirect.com/science/article/pii/S2238785422004999pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4985-7502pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-0539-4590pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-5212-6527pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-5761-4981pt_BR
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