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Mechanical and thermal characterisation of geopolymers based on silicate-activated metakaolin/slag blends

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Mechanical and thermal characterisation of geopolymers based on silicate-activated metakaolin/slag blends

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dc.contributor.author Bernal, Susan A. es_ES
dc.contributor.author Rodríguez Martínez, Erich David es_ES
dc.contributor.author Mejia De Gutierrez, Ruby es_ES
dc.contributor.author Gordillo, Marisol es_ES
dc.contributor.author Provis, John L. es_ES
dc.date.accessioned 2016-12-22T11:51:46Z
dc.date.available 2016-12-22T11:51:46Z
dc.date.issued 2011-08
dc.identifier.issn 0022-2461
dc.identifier.uri http://hdl.handle.net/10251/75657
dc.description.abstract [EN] This article assesses the effect of mix design parameters on the compressive strength and thermal performance of alkali silicate-activated blends of metakaolin (MK) and granulated blast furnace slag (GBFS). A strong interrelationship between the effects of activator composition and the GBFS/(GBFS + MK) ratio is identified through statistical analysis of compressive strength data. Pastes formulated with higher SiO 2/Al 2O 3 molar ratios show improvements in mechanical strength with increasing GBFS addition, associated with the formation of a structure comprising coexisting aluminosilicate 'geopolymer' gel and Ca-rich Al-substituted silicate hydrate (C-(A)-S-H) reaction products. The inclusion of GBFS in MK-based geopolymers seems also to improve their performance when exposed to high temperatures, as higher residual compressive strengths are reported for these mixtures compared to solely MK-based systems. Only slight differences in shrinkage behaviour are observed at temperatures of up to 600 °C with the inclusion of GBFS; however, slag-blended pastes exhibit enhanced stability at temperatures exceeding 800 °C, as no variation in the compressive strength and no additional shrinkage are identified. These results suggest that nanostructural modifications are induced in the gel by the inclusion of GBFS into MK-based geopolymers, improving the overall performance of these materials. © 2011 Springer Science+Business Media, LLC. es_ES
dc.description.sponsorship This study was sponsored by Universidad del Valle (Colombia), Instituto Colombiano para el Desarrollo de la Ciencia y Tecnologia "Francisco Jose de Caldas" (COLCIENCIAS) and the Center of Excellence of Novel Materials (CENM). The participation of JLP was funded by the Australian Research Council (ARC), including partial funding through the Particulate Fluids Processing Centre, a Special Research Centre of the ARC.
dc.language Inglés es_ES
dc.publisher Springer Verlag (Germany) es_ES
dc.relation.ispartof Journal of Materials Science es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Enhanced stability es_ES
dc.subject Granulated blast-furnace slags es_ES
dc.subject High temperature es_ES
dc.subject Metakaolins es_ES
dc.subject Mix designs es_ES
dc.subject Molar ratio es_ES
dc.subject Nanostructural es_ES
dc.subject Residual compressive strength es_ES
dc.subject Shrinkage behaviour es_ES
dc.subject Silicate hydrates es_ES
dc.subject Thermal characterisation es_ES
dc.subject Thermal Performance es_ES
dc.subject Aluminosilicates es_ES
dc.subject Aluminum es_ES
dc.subject Behavioral research es_ES
dc.subject Blast furnaces es_ES
dc.subject Gels es_ES
dc.subject Geopolymers es_ES
dc.subject Hydrates es_ES
dc.subject Inorganic polymers es_ES
dc.subject Metal refineries es_ES
dc.subject Shrinkage es_ES
dc.subject Silicon compounds es_ES
dc.subject Slags es_ES
dc.subject Compressive strength es_ES
dc.title Mechanical and thermal characterisation of geopolymers based on silicate-activated metakaolin/slag blends es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1007/s10853-011-5490-z
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería de la Construcción y de Proyectos de Ingeniería Civil - Departament d'Enginyeria de la Construcció i de Projectes d'Enginyeria Civil es_ES
dc.description.bibliographicCitation Bernal, SA.; Rodríguez Martínez, ED.; Mejía De Gutiérrez, R.; Gordillo, M.; Provis, JL. (2011). Mechanical and thermal characterisation of geopolymers based on silicate-activated metakaolin/slag blends. Journal of Materials Science. 46(16):5477-5486. doi:10.1007/s10853-011-5490-z es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.1007/s10853-011-5490-z es_ES
dc.description.upvformatpinicio 5477 es_ES
dc.description.upvformatpfin 5486 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 46 es_ES
dc.description.issue 16 es_ES
dc.relation.senia 191869 es_ES
dc.contributor.funder Universidad del Valle
dc.contributor.funder Departamento Administrativo de Ciencia, Tecnología e Innovación, Colombia
dc.contributor.funder Centro de Excelencia en Nuevos Materiales, Colombia
dc.contributor.funder Australian Research Council
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