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2023-11-10T18:16:21Z2023-11-10T18:16:21Z20221841944200https://doi.org/10.1016/j.jmrt.2022.03.1922238-7854http://hdl.handle.net/1843/60786https://orcid.org/0000-0002-4985-7502https://orcid.org/0000-0003-0539-4590https://orcid.org/0000-0001-5212-6527https://orcid.org/0000-0002-5761-4981CNPq - Conselho Nacional de Desenvolvimento Científico e TecnológicoFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas GeraisCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorOutra AgênciaMining 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.engUniversidade Federal de Minas GeraisUFMGBrasilENG - DEPARTAMENTO DE ENGENHARIA MINASICX - DEPARTAMENTO DE QUÍMICAJournal of Materials Research and TechnologyMinerios de ferroRefugos (Metalurgia)Óxidos de ferroMagnetitaHematitaResíduosHidróxidosSilicatosRaios X - DifraçãoCaulinitaFourier, Espectroscopia de infravermelho por transformada deMossbauer, Espectroscopia deMicroscopia eletrônicaCompósitos poliméricosCimentoFerro - Minas e mineraçãoIron ore tailingsMetakaolinGeopolymerAlkaline activated materialReuse of iron ore tailings for production of metakaolin-based geopolymersinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttps://www.sciencedirect.com/science/article/pii/S2238785422004999Igor Crego FerreiraRoberto GaléryAndréia Bicalho HenriquesAna Paula de Carvalho TeixeiraCaroline Duarte PratesAthos Silva LimaIsnaldi Rodrigues de Souza Filhoapplication/pdfinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFMGinstname:Universidade Federal de Minas Gerais (UFMG)instacron:UFMGLICENSELicense.txtLicense.txttext/plain; charset=utf-82042https://repositorio.ufmg.br/bitstream/1843/60786/1/License.txtfa505098d172de0bc8864fc1287ffe22MD51ORIGINALReuse of iron ore tailings for production of metakaolin-based geopolymers.pdfReuse of iron ore tailings for production of metakaolin-based geopolymers.pdfapplication/pdf1481233https://repositorio.ufmg.br/bitstream/1843/60786/2/Reuse%20of%20iron%20ore%20tailings%20for%20production%20of%20metakaolin-based%20geopolymers.pdf43bb752f6c9a5c3a429244d0faadd8e4MD521843/607862023-11-10 15:16:22.165oai:repositorio.ufmg.br:1843/60786Repositório InstitucionalPUBhttps://repositorio.ufmg.br/oaiopendoar:2023-11-10T18:16:22Repositório Institucional da UFMG - Universidade Federal de Minas Gerais (UFMG)false
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