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dc.contributor.authorSilva, Arthur Aviz Palma e-
dc.contributor.authorCapuzzo, Valdirene Maria Silva C.-
dc.contributor.authorSilva, Eugênia Fonseca-
dc.contributor.authorPereira, André Maues Brabo-
dc.contributor.authorSilva, Douglas Aviz Palma e-
dc.date.accessioned2023-11-29T13:22:15Z-
dc.date.available2023-11-29T13:22:15Z-
dc.date.issued2022-02-
dc.identifier.citationSILVA, Arthur Aviz Palma e et al. Evaluation of mechanical properties and microstructure of high-performance mortars with superabsorbent polymers and metakaolin by means of X-ray computed microtomography. Journal of Building Engineering, v. 51, 104219, 2022. DOI: https://doi.org/10.1016/j.jobe.2022.104219pt_BR
dc.identifier.urihttp://repositorio2.unb.br/jspui/handle/10482/46925-
dc.language.isoengpt_BR
dc.publisherlsevier Ltd.pt_BR
dc.rightsAcesso Restritopt_BR
dc.titleEvaluation of mechanical properties and microstructure of high-performance mortars with superabsorbent polymers and metakaolin by means of X-ray computed microtomographypt_BR
dc.typeArtigopt_BR
dc.subject.keywordPolímero superabsorventept_BR
dc.subject.keywordConcreto de alto desempenhopt_BR
dc.subject.keywordMicrotomografia de raios Xpt_BR
dc.identifier.doihttps://doi.org/10.1016/j.jobe.2022.104219pt_BR
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S2352710222002327?via%3Dihubpt_BR
dc.description.abstract1Superabsorbent polymers (SAP) may provide internal curing in cementitious materials, conse- quently, they reduce autogenous shrinkage caused by low water/cement ratios and autodesse- cation of pores. This paper aimed to analyze the effect of Superabsorbent polymers in high- strength mortars, using metakaolin as supplementary cementitious material (SCM). A X-ray microtomography test was carried out on two mixtures of mortars, a reference mix (MKREF) and a mix containing 0.30% superabsorbent polymer (MKSAP30), and the acquired images enabled the evaluation of mortar phases, anhydrate cement and void content. Also, a compressive strength test was carried out at 3 ages for both mixtures. The superabsorbent polymer was added still dry in the mixture, and no extra water was used for SAP absorption, hence, all the mixtures had the same total water/cement ratios. The results point to an increase in mechanical properties on mortars modified with SAP of 51% at the age of 28 days. Also, a higher porosity was observed in MKSAP30 samples, however, the pores were of small diameters, showing that SAP may provide refinement in pores of the cement matrix. In addition, a higher pore connectivity was detected, and an increase in the number of pores accounted using microtomographic images and the software called Fiji/ImageJ software for MKSAP30. The SAP modified mortar also showed more pores tortuosity. Finally, a lower percentage of anhydrate cement remaining in the mixture with SAP was shown, pointing to an optimization of the hydration degree, corroborating to the improvement of mechanical properties.pt_BR
dc.contributor.affiliationUniversity of Brasília, Graduate Program in Structures and Civil Constructionpt_BR
dc.contributor.affiliationUniversity of Brasília, Graduate Program in Structures and Civil Constructionpt_BR
dc.contributor.affiliationUniversity of Brasília, Graduate Program in Structures and Civil Constructionpt_BR
dc.contributor.affiliationFederal Fluminense Universitypt_BR
dc.contributor.affiliationState University of Parápt_BR
dc.description.unidadeFaculdade de Tecnologia (FT)pt_BR
dc.description.unidadeDepartamento de Engenharia Civil e Ambiental (FT ENC)pt_BR
dc.description.ppgPrograma de Pós-Graduação em Estruturas e Construção Civilpt_BR
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