Reuse of iron ore tailings for production of metakaolin-based geopolymers

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dc.creatorIgor Crego Ferreira
dc.creatorRoberto Galéry
dc.creatorAndréia Bicalho Henriques
dc.creatorAna Paula de Carvalho Teixeira
dc.creatorCaroline Duarte Prates
dc.creatorAthos Silva Lima
dc.creatorIsnaldi Rodrigues de Souza Filho
dc.date.accessioned2023-11-10T18:16:21Z
dc.date.accessioned2025-09-09T00:03:05Z
dc.date.available2023-11-10T18:16:21Z
dc.date.issued2022
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.description.sponsorshipOutra Agência
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.1016/j.jmrt.2022.03.192
dc.identifier.issn2238-7854
dc.identifier.urihttps://hdl.handle.net/1843/60786
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Materials Research and Technology
dc.rightsAcesso Aberto
dc.subjectMinerios de ferro
dc.subjectRefugos (Metalurgia)
dc.subjectÓxidos de ferro
dc.subjectMagnetita
dc.subjectHematita
dc.subjectResíduos
dc.subjectHidróxidos
dc.subjectSilicatos
dc.subjectRaios X - Difração
dc.subjectCaulinita
dc.subjectFourier, Espectroscopia de infravermelho por transformada de
dc.subjectMossbauer, Espectroscopia de
dc.subjectMicroscopia eletrônica
dc.subjectCompósitos poliméricos
dc.subjectCimento
dc.subjectFerro - Minas e mineração
dc.subject.otherIron ore tailings
dc.subject.otherMetakaolin
dc.subject.otherGeopolymer
dc.subject.otherAlkaline activated material
dc.titleReuse of iron ore tailings for production of metakaolin-based geopolymers
dc.typeArtigo de periódico
local.citation.epage4200
local.citation.spage4194
local.citation.volume18
local.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.
local.identifier.orcidhttps://orcid.org/0000-0002-4985-7502
local.identifier.orcidhttps://orcid.org/0000-0003-0539-4590
local.identifier.orcidhttps://orcid.org/0000-0001-5212-6527
local.identifier.orcidhttps://orcid.org/0000-0002-5761-4981
local.publisher.countryBrasil
local.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA MINAS
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S2238785422004999

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