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Effect of nanosilica-based activators on the performance of an alkali-activated fly ash

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Effect of nanosilica-based activators on the performance of an alkali-activated fly ash

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dc.contributor.author Rodriguez Martinez, Erich David es_ES
dc.contributor.author Bernal, Susan A. es_ES
dc.contributor.author Provis, John L. es_ES
dc.contributor.author Paya Bernabeu, Jorge Juan es_ES
dc.contributor.author Monzó Balbuena, José Mª es_ES
dc.contributor.author Borrachero Rosado, María Victoria es_ES
dc.date.accessioned 2014-05-23T10:20:03Z
dc.date.issued 2013-01
dc.identifier.issn 0958-9465
dc.identifier.uri http://hdl.handle.net/10251/37707
dc.description.abstract This paper assesses the effect of the use of an alternative activator based on nanosilica/MOH (M = K+ or Na+) blended solutions on the performance of alkali-activated fly ash binders. Binders produced with commercial silicate activators display a greater degree of reaction, associated with increased contents of geopolymer gel; however, mortars produced with the alternative nanosilica-based activators exhibited lower water demand and reduced permeability, independent of the alkali cation used. Na-based activators promote higher compressive strength compared with K-based activators, along with a refined pore structure, although K-activated samples exhibit reduced water demand. Zeolite type products are the major crystalline phases formed within these binders. A wider range of zeolites is formed when using commercial silicate solutions compared with the alternative activators. These results suggest that there are variations in the availability of Si in the system, and consequently in the alkalinity, depending on the silicate source in the activator, which is important in determining the nanostructure of the geopolymer gel. es_ES
dc.description.sponsorship This study was sponsored by the Ministerio de Ciencia e Innovacion of Spain (Project GEORES MAT2010-19934 and research scholarship BES-2008-002440), European regional development fund (FEDER), and the Universitat Politecnica de Valencia (Spain). The participation of SAB and 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. A special acknowledgement is also due to the Centre of Electron Microscopy of the Universitat Politecnica de Valencia and Pedro Garces from the Universidad de Alicante for support in some experiments. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation Ministerio de Ciencia e Innovacion of Spain [GEORES MAT2010-19934, BES-2008-002440] es_ES
dc.relation European regional development fund (FEDER) es_ES
dc.relation Universitat Politecnica de Valencia (Spain) es_ES
dc.relation Australian Research Council (ARC) through the Particulate Fluids Processing Centre, a Special Research Centre of the ARC es_ES
dc.relation.ispartof Cement and Concrete Composites es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Alkali-activated binders es_ES
dc.subject Soluble silicate solutions es_ES
dc.subject Nanosilica es_ES
dc.subject X-ray diffraction es_ES
dc.subject Scanning electron microscopy es_ES
dc.subject.classification INGENIERIA DE LA CONSTRUCCION es_ES
dc.title Effect of nanosilica-based activators on the performance of an alkali-activated fly ash es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.cemconcomp.2012.08.025
dc.rights.accessRights Abierto 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 Rodriguez Martinez, ED.; Bernal, SA.; Provis, JL.; Paya Bernabeu, JJ.; Monzó Balbuena, JM.; Borrachero Rosado, MV. (2013). Effect of nanosilica-based activators on the performance of an alkali-activated fly ash. Cement and Concrete Composites. 35(1):1-11. doi:10.1016/j.cemconcomp.2012.08.025 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.cemconcomp.2012.08.025 es_ES
dc.description.upvformatpinicio 1 es_ES
dc.description.upvformatpfin 11 es_ES
dc.type.version info:eu repo/semantics/publishedVersion es_ES
dc.description.volume 35 es_ES
dc.description.issue 1 es_ES
dc.relation.senia 233004


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