1. Repositório Institucional da Universidade Federal de Sergipe - RI/UFS
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  3. P2CEM - Programa de Pós-Graduação em Ciência e Engenharia de Materiais (Produção Científica)
  4. P2CEM - Artigos de periódicos
Use este identificador para citar ou linkar para este item: https://ri.ufs.br/jspui/handle/riufs/24321
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dc.contributor.authorGomes Neto, David de Paiva-
dc.contributor.authorConceição, Herbet-
dc.contributor.authorLisboa, Vinícius Anselmo Carvalho-
dc.contributor.authorSantana, Rodrigo Soares de-
dc.contributor.authorBarreto, Ledjane Silva-
dc.date.accessioned2026-01-20T18:44:17Z-
dc.date.available2026-01-20T18:44:17Z-
dc.date.issued2014-
dc.identifier.citationGOMES NETO, D. P. et al. Influence of granitic aggregates from Northeast Brazil on the alkali-aggregate reaction. Materials Research, São Carlos, v. 17, n. 1, 2014. Disponível em: https://www.scielo.br/j/mr/a/SnYqC5QLfw9vrzP9nFnBXkr/?lang=en. Acesso em: 20 jan. 2026.pt_BR
dc.identifier.issn1980-5373-
dc.identifier.urihttps://ri.ufs.br/jspui/handle/riufs/24321-
dc.languageporpt_BR
dc.publisherAssociação Brasileira de Metalurgia, Materiais e Mineração (ABM) / Associação Brasileira de Cerâmica (ABC) / Associação Brasileira de Polímeros (ABPol)pt_BR
dc.relation.ispartofMaterials Researchpt_BR
dc.subjectGranitic aggregateseng
dc.subjectAlkali-aggregate reactioneng
dc.subjectPetrographic analysiseng
dc.subjectMicrocrystalline quartzeng
dc.subjectSilica dissolutioneng
dc.subjectMortar bar expansioneng
dc.titleInfluence of granitic aggregates from Northeast Brazil on the alkali-aggregate reactionpt_BR
dc.typeArtigopt_BR
dc.identifier.licenseCreative Commons Atribuição-NãoComercial 4.0 Internacional (CC BY-NC 4.0)pt_BR
dc.description.resumoThe alkali-aggregate reaction (AAR) in concrete structures is a problem that has concerned engineers and researchers for decades. This reaction occurs when silicates in the aggregates react with the alkalis, forming an expanded gel that can cause cracks in the concrete and reduce its lifespan. The aim of this study was to characterize three coarse granitic aggregates employed in concrete production in northeastern Brazil, correlating petrographic analysis with the kinetics of silica dissolution and the evolution of expansions in mortar bars, assisted by SEM/EDS, XRD, and EDX. The presence of grains showing recrystallization into individual microcrystalline quartz subgrains was associated with faster dissolution of silica and greater expansion in mortar bars. Aggregates showing substantial deformation, such as stretched grains of quartz with strong undulatory extinction, experienced slower dissolution, with reaction and expansion occurring over longer periods that could not be detected using accelerated tests with mortar bars.pt_BR
dc.description.localSão Carlospt_BR
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