Repulsion forces of superplasticizers on ground granulated blast furnace slag in alkaline media, from AFM measurements to rheological properties

[EN]The electrostatic and steric repulsion induced by different superplasticizers on ground granulated blast furnace slag in alkaline media have been studied. The superplasticizers were sulfonated naphthalene, sulfonated melamine, vinyl copolymer, and polycarboxylate- based admixtures. With these su...

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Detalles Bibliográficos
Autores: Palacios, Marta, Kappl, M., Stuer, M., Aschauer, U., Bowen, Paul, Butt, H.J., Pecharromán, Carlos, Puertas, Francisca
Tipo de recurso: artículo
Fecha de publicación:2012
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/73107
Acceso en línea:http://hdl.handle.net/10261/73107
Access Level:acceso abierto
Palabra clave:Dispersion
Ground granulated blast furnace slag
Surfaces
Suspensions
Rheology
Dispersión
Escoria granulada de horno alto
Superficies
Suspensiones
Reología
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spelling Repulsion forces of superplasticizers on ground granulated blast furnace slag in alkaline media, from AFM measurements to rheological propertiesFuerzas de repulsión de aditivos superplastificantes en sistemas de escoria granulada de horno alto en medios alcalinos, desde medidas AFM a propiedades reológicasPalacios, MartaKappl, M.Stuer, M.Aschauer, U.Bowen, PaulButt, H.J.Pecharromán, CarlosPuertas, FranciscaDispersionGround granulated blast furnace slagSurfacesSuspensionsRheologyDispersiónEscoria granulada de horno altoSuperficiesSuspensionesReología[EN]The electrostatic and steric repulsion induced by different superplasticizers on ground granulated blast furnace slag in alkaline media have been studied. The superplasticizers were sulfonated naphthalene, sulfonated melamine, vinyl copolymer, and polycarboxylate- based admixtures. With these superplasticizers the slag suspensions had negative zeta potentials, ranging from -3 to -10 mV. For the first time the adsorbed layer thicknesses for superplasticizers on slag using colloidal probe atomic force microscopy has been measured. To model the interparticle force interactions an effective Hamaker constant was computed from dielectric properties measured on a dense slag sample produced by spark plasma sintering. The obtained results conclude that the dispersion mechanism for all the superplasticizers studied in the present work is mainly dominated by the steric repulsion. Results were then used in a yield stress model, YODEL, to predict the yield stress with and without the superplasticizers. Predictions of the yield stress agreed well with experimental results.[ES]En este trabajo se ha estudiado la repulsión electrostática y estérica inducida por diferentes aditivos superplastificantes en sistemas de escoria de horno alto en medios alcalinos. Se han estudiado aditivos superplastificantes basados en naftaleno, melamina, copolímeros vinílicos y basados en policarboxilato. Estos aditivos inducen en la escoria un potencial zeta negativo, entre -3 y -10 mV. Por primera vez, se ha determinado el grosor de la capa de aditivo adsorbido sobre la escoria mediante microscopía de fuerzas atómicas (AFM). Para modelizar las fuerzas de interacción entre partículas, se ha determinado la constante efectiva de Hamaker de la escoria a partir de las propiedades dieléctricas de una muestra de escoria obtenida mediante sinterización spark plasma sintering. Los resultados obtenidos concluyen que el mecanismo de dispersión de los superplastificantes estudiados en este trabajo está gobernado fundamentalmente por la repulsión estérica. Utilizando el modelo YODEL se ha podido predecir el esfuerzo de cizalla umbral de sistemas de escoria con y sin superplastificantes. Los resultados calculados están de acuerdo con los valores de esfuerzo de cizalla determinados experimentalmente.Peer reviewedCSIC - Instituto de Ciencias de la Construcción Eduardo Torroja (IETCC)201320132012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/73107reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Españolhttp://dxdoi.org/10.3989/mc.2012.01612info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/731072026-05-22T06:33:51Z
dc.title.none.fl_str_mv Repulsion forces of superplasticizers on ground granulated blast furnace slag in alkaline media, from AFM measurements to rheological properties
Fuerzas de repulsión de aditivos superplastificantes en sistemas de escoria granulada de horno alto en medios alcalinos, desde medidas AFM a propiedades reológicas
title Repulsion forces of superplasticizers on ground granulated blast furnace slag in alkaline media, from AFM measurements to rheological properties
spellingShingle Repulsion forces of superplasticizers on ground granulated blast furnace slag in alkaline media, from AFM measurements to rheological properties
Palacios, Marta
Dispersion
Ground granulated blast furnace slag
Surfaces
Suspensions
Rheology
Dispersión
Escoria granulada de horno alto
Superficies
Suspensiones
Reología
title_short Repulsion forces of superplasticizers on ground granulated blast furnace slag in alkaline media, from AFM measurements to rheological properties
title_full Repulsion forces of superplasticizers on ground granulated blast furnace slag in alkaline media, from AFM measurements to rheological properties
title_fullStr Repulsion forces of superplasticizers on ground granulated blast furnace slag in alkaline media, from AFM measurements to rheological properties
title_full_unstemmed Repulsion forces of superplasticizers on ground granulated blast furnace slag in alkaline media, from AFM measurements to rheological properties
title_sort Repulsion forces of superplasticizers on ground granulated blast furnace slag in alkaline media, from AFM measurements to rheological properties
dc.creator.none.fl_str_mv Palacios, Marta
Kappl, M.
Stuer, M.
Aschauer, U.
Bowen, Paul
Butt, H.J.
Pecharromán, Carlos
Puertas, Francisca
author Palacios, Marta
author_facet Palacios, Marta
Kappl, M.
Stuer, M.
Aschauer, U.
Bowen, Paul
Butt, H.J.
Pecharromán, Carlos
Puertas, Francisca
author_role author
author2 Kappl, M.
Stuer, M.
Aschauer, U.
Bowen, Paul
Butt, H.J.
Pecharromán, Carlos
Puertas, Francisca
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Dispersion
Ground granulated blast furnace slag
Surfaces
Suspensions
Rheology
Dispersión
Escoria granulada de horno alto
Superficies
Suspensiones
Reología
topic Dispersion
Ground granulated blast furnace slag
Surfaces
Suspensions
Rheology
Dispersión
Escoria granulada de horno alto
Superficies
Suspensiones
Reología
description [EN]The electrostatic and steric repulsion induced by different superplasticizers on ground granulated blast furnace slag in alkaline media have been studied. The superplasticizers were sulfonated naphthalene, sulfonated melamine, vinyl copolymer, and polycarboxylate- based admixtures. With these superplasticizers the slag suspensions had negative zeta potentials, ranging from -3 to -10 mV. For the first time the adsorbed layer thicknesses for superplasticizers on slag using colloidal probe atomic force microscopy has been measured. To model the interparticle force interactions an effective Hamaker constant was computed from dielectric properties measured on a dense slag sample produced by spark plasma sintering. The obtained results conclude that the dispersion mechanism for all the superplasticizers studied in the present work is mainly dominated by the steric repulsion. Results were then used in a yield stress model, YODEL, to predict the yield stress with and without the superplasticizers. Predictions of the yield stress agreed well with experimental results.
publishDate 2012
dc.date.none.fl_str_mv 2012
2013
2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/73107
url http://hdl.handle.net/10261/73107
dc.language.none.fl_str_mv Español
language_invalid_str_mv Español
dc.relation.none.fl_str_mv http://dxdoi.org/10.3989/mc.2012.01612
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv CSIC - Instituto de Ciencias de la Construcción Eduardo Torroja (IETCC)
publisher.none.fl_str_mv CSIC - Instituto de Ciencias de la Construcción Eduardo Torroja (IETCC)
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812455

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