Effect of different high surface area silicas on the rheology of cement paste

dc.contributor.affiliationDepartamento de Ingeniería de la Construcción y de Proyectos de Ingeniería Civil
dc.contributor.affiliationEscuela Técnica Superior de Ingeniería de Caminos, Canales y Puertos
dc.contributor.affiliationInstituto Universitario de Investigación de Ciencia y Tecnología del Hormigón
dc.contributor.authorTobón, J.I.es_ES
dc.contributor.authorMendoza, O.es_ES
dc.contributor.authorRestrepo, O.J.es_ES
dc.contributor.authorBorrachero Rosado, María Victoria
dc.contributor.authorPaya Bernabeu, Jorge Juan
dc.date.accessioned2021-05-28T03:33:01Z
dc.date.available2021-05-28T03:33:01Z
dc.date.issued2020-12es_ES
dc.description.abstract[ES] Efecto de diferentes sílices de alta área superficial sobre la reología de pastas de cemento. Este tra¬bajo estudia el efecto de la nanosílice (NS) sobre la reología de pastas de cemento por comparación con sílices de alta área superficial: humo de sílice (SF) y pirosílice (PS). Las pastas fueron fabricadas con diferentes rela¬ciones agua-material cementante y sustituciones sólidas de sílice. Fueron ejecutados ensayos de demanda de agua, tiempo de fraguado y reología. Se encontró que la NS y SF disminuyen la viscosidad plástica, mientras que la PS la aumenta. Solo la PS tuvo efecto sobre el límite elástico. La NS presentó mayor disminución de la viscosidad, independientemente de su alta demanda de agua. Se concluyó que el comportamiento de las pastas con NS y SF es gobernado por el efecto de ¿rodamiento¿ de la sílice, por su grado de aglomeración y por su impacto en la fracción de sólidos. El comportamiento de las pastas con PS es gobernado por su capacidad de absorber agua.es_ES
dc.description.abstract[EN] This work studies the effect of nanosilica (NS) on the rheology of cement paste by comparing it with two high specific surface area silicas: silica fume (SF) and pyrogenic silica (PS). Portland cement pastes were produced with different water-to-cementing material ratios and different solid substitutions of cement by silica. Water demand, setting time, and rheology tests were performed. Results showed that NS and SF decreased plastic viscosity, while PS increased it. Only PS was found to have an effect on yield stress. NS showed the most decreasing effect on viscosity, regardless of its higher water demand. It was concluded that the behavior of pastes containing NS and SF is governed by the "ball-bearing" effect from silica particles, by their agglomeration degree, and their impact on the solid volume fraction. The behavior of pastes containing PS is governed by its ability to absorb a portion of the mixing water.en_EN
dc.description.accrualMethodSes_ES
dc.description.bibliographicCitationTobón, J.; Mendoza, O.; Restrepo, O.; Borrachero Rosado, MV.; Paya Bernabeu, JJ. (2020). Effect of different high surface area silicas on the rheology of cement paste. Materiales de Construcción. 70(340):1-9. https://doi.org/10.3989/mc.2020.15719es_ES
dc.description.issue340es_ES
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dc.description.upvformatpfin9es_ES
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dc.description.volume70es_ES
dc.identifier.doi10.3989/mc.2020.15719es_ES
dc.identifier.issn0465-2746es_ES
dc.identifier.urihttps://riunet.upv.es/handle/10251/166902
dc.languageIngléses_ES
dc.publisherDepartmento de Publicaciones del CSICes_ES
dc.relation.ispartofMateriales de Construcciónes_ES
dc.relation.pasarelaS\430873es_ES
dc.relation.publisherversionhttps://doi.org/10.3989/mc.2020.15719es_ES
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dc.rightsReconocimiento (by)es_ES
dc.rights.accessRightsAbiertoes_ES
dc.subjectRheologyes_ES
dc.subjectWorkabilityes_ES
dc.subjectSuperficial areaes_ES
dc.subjectPozzolanes_ES
dc.subjectCement pastees_ES
dc.subjectReologíaes_ES
dc.subjectTrabajabilidades_ES
dc.subjectÁrea superficiales_ES
dc.subjectPuzolana, Pasta de cementoes_ES
dc.subject.classificationINGENIERIA DE LA CONSTRUCCIONes_ES
dc.subject.ods09.- Desarrollar infraestructuras resilientes, promover la industrialización inclusiva y sostenible, y fomentar la innovaciónes_ES
dc.subject.ods11.- Conseguir que las ciudades y los asentamientos humanos sean inclusivos, seguros, resilientes y sostenibleses_ES
dc.titleEffect of different high surface area silicas on the rheology of cement pastees_ES
dc.typeArtículoes_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dspace.entity.typePublication
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