Behaviour of a starch as a viscosity modifier for aerial lime-based mortars

Different dosages of a commercialized potato starch were added to aerial lime-based mortars in order to check its efficiency as a rheological modifier. Several fresh state properties of the mortars were studied: consistency, density, air content, water retention capacity, setting time and evolution...

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Detalles Bibliográficos
Autores: Izaguirre, A. (Ana)|||/items/04e454cd-3cfa-42b0-aa23-b7a9163b2148, Lanas, J. (Javier)|||/items/adc6c03f-a341-4e49-ae5e-b32a86889598, Alvarez-Galindo, J.I. (José Ignacio)|||/items/c88ef755-513c-4ff3-bbff-44aadbf32204
Tipo de recurso: artículo
Fecha de publicación:2010
País:España
Institución:Universidad de Navarra
Repositorio:Dadun. Depósito Académico Digital de la Universidad de Navarra
Idioma:inglés
OAI Identifier:oai:dadun.unav.edu:10171/27859
Acceso en línea:https://hdl.handle.net/10171/27859
Access Level:acceso abierto
Palabra clave:Lime
Mortar
Action mechanism
Thickener
Starch
Dispersing agent
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spelling Behaviour of a starch as a viscosity modifier for aerial lime-based mortarsIzaguirre, A. (Ana)|||/items/04e454cd-3cfa-42b0-aa23-b7a9163b2148Lanas, J. (Javier)|||/items/adc6c03f-a341-4e49-ae5e-b32a86889598Alvarez-Galindo, J.I. (José Ignacio)|||/items/c88ef755-513c-4ff3-bbff-44aadbf32204LimeMortarAction mechanismThickenerStarchDispersing agentDifferent dosages of a commercialized potato starch were added to aerial lime-based mortars in order to check its efficiency as a rheological modifier. Several fresh state properties of the mortars were studied: consistency, density, air content, water retention capacity, setting time and evolution when applied on support. The effect of the starch on ζ-potential of the lime particle surface as well as the particle size distribution and viscosity changes in lime pastes were also assessed in order to elucidate the action mechanism of the polymer. The behaviour of this starch polymer was found to be strongly dosage-dependent: it acted as a thickener when the incorporated dosage was up to 0.30% of lime weight; conversely, above that dosage, it behaved as a plasticizer. The thickening effect took place because polymer molecules were adsorbed onto lime particles acting as a flocculant, as confirmed by zeta-potential and particle size distribution results. For large amounts of polymer, steric hindrance and electrostatic repulsive forces appeared, leading to a dispersion mechanism which explained the plasticizing effect as well as the fresh mortar behaviour.ElsevierDadun. Depósito Académico Digital Universidad de Navarra20132013-02-1320102010-03-2520102010-03-25journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10171/27859reponame:Dadun. Depósito Académico Digital de la Universidad de Navarrainstname:Universidad de NavarraInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:dadun.unav.edu:10171/278592026-06-21T12:47:57Z
dc.title.none.fl_str_mv Behaviour of a starch as a viscosity modifier for aerial lime-based mortars
title Behaviour of a starch as a viscosity modifier for aerial lime-based mortars
spellingShingle Behaviour of a starch as a viscosity modifier for aerial lime-based mortars
Izaguirre, A. (Ana)|||/items/04e454cd-3cfa-42b0-aa23-b7a9163b2148
Lime
Mortar
Action mechanism
Thickener
Starch
Dispersing agent
title_short Behaviour of a starch as a viscosity modifier for aerial lime-based mortars
title_full Behaviour of a starch as a viscosity modifier for aerial lime-based mortars
title_fullStr Behaviour of a starch as a viscosity modifier for aerial lime-based mortars
title_full_unstemmed Behaviour of a starch as a viscosity modifier for aerial lime-based mortars
title_sort Behaviour of a starch as a viscosity modifier for aerial lime-based mortars
dc.creator.none.fl_str_mv Izaguirre, A. (Ana)|||/items/04e454cd-3cfa-42b0-aa23-b7a9163b2148
Lanas, J. (Javier)|||/items/adc6c03f-a341-4e49-ae5e-b32a86889598
Alvarez-Galindo, J.I. (José Ignacio)|||/items/c88ef755-513c-4ff3-bbff-44aadbf32204
author Izaguirre, A. (Ana)|||/items/04e454cd-3cfa-42b0-aa23-b7a9163b2148
author_facet Izaguirre, A. (Ana)|||/items/04e454cd-3cfa-42b0-aa23-b7a9163b2148
Lanas, J. (Javier)|||/items/adc6c03f-a341-4e49-ae5e-b32a86889598
Alvarez-Galindo, J.I. (José Ignacio)|||/items/c88ef755-513c-4ff3-bbff-44aadbf32204
author_role author
author2 Lanas, J. (Javier)|||/items/adc6c03f-a341-4e49-ae5e-b32a86889598
Alvarez-Galindo, J.I. (José Ignacio)|||/items/c88ef755-513c-4ff3-bbff-44aadbf32204
author2_role author
author
dc.contributor.none.fl_str_mv Dadun. Depósito Académico Digital Universidad de Navarra
dc.subject.none.fl_str_mv Lime
Mortar
Action mechanism
Thickener
Starch
Dispersing agent
topic Lime
Mortar
Action mechanism
Thickener
Starch
Dispersing agent
description Different dosages of a commercialized potato starch were added to aerial lime-based mortars in order to check its efficiency as a rheological modifier. Several fresh state properties of the mortars were studied: consistency, density, air content, water retention capacity, setting time and evolution when applied on support. The effect of the starch on ζ-potential of the lime particle surface as well as the particle size distribution and viscosity changes in lime pastes were also assessed in order to elucidate the action mechanism of the polymer. The behaviour of this starch polymer was found to be strongly dosage-dependent: it acted as a thickener when the incorporated dosage was up to 0.30% of lime weight; conversely, above that dosage, it behaved as a plasticizer. The thickening effect took place because polymer molecules were adsorbed onto lime particles acting as a flocculant, as confirmed by zeta-potential and particle size distribution results. For large amounts of polymer, steric hindrance and electrostatic repulsive forces appeared, leading to a dispersion mechanism which explained the plasticizing effect as well as the fresh mortar behaviour.
publishDate 2010
dc.date.none.fl_str_mv 2010
2010-03-25
2010
2010-03-25
2013
2013-02-13
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10171/27859
url https://hdl.handle.net/10171/27859
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Dadun. Depósito Académico Digital de la Universidad de Navarra
instname:Universidad de Navarra
instname_str Universidad de Navarra
reponame_str Dadun. Depósito Académico Digital de la Universidad de Navarra
collection Dadun. Depósito Académico Digital de la Universidad de Navarra
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300724

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