Rodríguez Martínez, ED.; Soriano Martinez, L.; Paya Bernabeu, JJ.; Borrachero Rosado, MV.; Monzó Balbuena, JM. (2012). Increase of the reactivity of densified silica fume by sonication treatment. Ultrasonics Sonochemistry. 19(5):1099-1107. doi:10.1016/j.ultsonch.2012.01.011
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/47298
Title:
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Increase of the reactivity of densified silica fume by sonication treatment
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Author:
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Rodríguez Martínez, Erich David
Soriano Martínez, Lourdes
Paya Bernabeu, Jorge Juan
Borrachero Rosado, María Victoria
Monzó Balbuena, José Mª
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UPV Unit:
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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
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Issued date:
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Abstract:
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Five silica fumes from different manufacturers were subjected to ultrasonic treatment in order to decrease particle agglomeration and improve particle dispersion. The effectiveness of the sonication was observed as a ...[+]
Five silica fumes from different manufacturers were subjected to ultrasonic treatment in order to decrease particle agglomeration and improve particle dispersion. The effectiveness of the sonication was observed as a reduction in particle size distribution of sonicated silica fume (SSF) compared to non-sonicated silica fume. SSF was added to Portland cement, and then the hydrated paste was analysed by thermogravimetric analyses (TGA/DTG) and scanning electron microscopy (SEM/EDX). The results were compared with those of control pastes made with untreated densified silica fume (DSF), as well as a reference cement paste of ordinary Portland cement (OPC). A maximum grade of de-agglomeration by the sonication was obtained, with a high volume of particles of diameter less than 1 mu m. Images obtained by transmission electron microscopy (TEM) of the SSF showed sintered particles that could not be fragmented by the treatment. Micro-structural characterisation results showed an increase in the reactivity of the silica fume after the treatment. (C) 2012 Elsevier B.V. All rights reserved.
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Subjects:
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Silica fume
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Particle size distribution
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Dispersion
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Thermal analysis
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Copyrigths:
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Reserva de todos los derechos
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Source:
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Ultrasonics Sonochemistry. (issn:
1350-4177
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DOI:
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10.1016/j.ultsonch.2012.01.011
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Publisher:
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Elsevier
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Publisher version:
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http://dx.doi.org/10.1016/j.ultsonch.2012.01.011
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Project ID:
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info:eu-repo/grantAgreement/MICINN//BES-2008-002440/ES/BES-2008-002440/ /
info:eu-repo/grantAgreement/MEC//BIA2007-63252/ES/ACTIVACION DEL HUMO DE SILICE MEDIANTE TECNICAS DE ULTRASONIDOS PARA EL DESARROLLO DE NUEVOS CONGLOMERANTES EN EL CAMPO DE LA CONTRUCCION/ /
info:eu-repo/grantAgreement/MICINN//EEBB-2011-43847/ES/EEBB-2011-43847/ /
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Thanks:
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Acknowledgments to Ministerio de Ciencia e Innovacion (Project BIA-2007-63252 and research scholarship BES-2008-002440 and EEBB-2011-43847) of Spain, European regional development fund (FEDER), and Ferroatlantica I + D for ...[+]
Acknowledgments to Ministerio de Ciencia e Innovacion (Project BIA-2007-63252 and research scholarship BES-2008-002440 and EEBB-2011-43847) of Spain, European regional development fund (FEDER), and Ferroatlantica I + D for the support on the development of this research. A special acknowledgement is also due to the Centre of Electron Microscopy of the Universitat Politecnica de Valencia.
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Type:
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Artículo
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