Influence of expansive calcium sulfoaluminate agent dosage on properties and microstructure of expansive self-compacting concretes

Expansive concretes based on the formation of ettringite from calcium sulfoaluminate agents are presented as an effective alternative to minimize the problems derived from shrinkage and low tensile strength at the early ages of the concrete. However, determining the mechanism responsible for the exp...

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Authors: Carballosa, Pedro, García Calvo, José Luis, Revuelta Crespo, David
Format: article
Status:Versión aceptada para publicación
Publication Date:2020
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/219482
Online Access:http://hdl.handle.net/10261/219482
Access Level:Open access
Keyword:Expansive self-compacting concrete
Ettringite
MicrostructureFree expansion
Mechanical properties
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spelling Influence of expansive calcium sulfoaluminate agent dosage on properties and microstructure of expansive self-compacting concretesCarballosa, PedroGarcía Calvo, José LuisRevuelta Crespo, DavidExpansive self-compacting concreteEttringiteMicrostructureFree expansionMechanical propertiesExpansive concretes based on the formation of ettringite from calcium sulfoaluminate agents are presented as an effective alternative to minimize the problems derived from shrinkage and low tensile strength at the early ages of the concrete. However, determining the mechanism responsible for the expansion is still a controversial issue today. In this study, the influence of three doses of expansive agent on fresh state and on compressive strength and magnitude of free expansion under two curing environments was evaluated on a reference mixture of self-compacting concrete (SCC). The microstructural evolution of the hydrates and anhydrous related with the expansive phenomena was also studied. From our observations it seems that an eminently amorphous ettringite is formed and that this ettringite would be strongly related to expansion. As a result, the influence of the ratio w/cementitious material and curing environment on the magnitude of the expansion as well as the influence of this on the mechanical properties of the SCCs was identified.Authors gratefully acknowledge the Spanish Ministry of Economy and Competitiveness for the financial support given to this research in BIA2015-64363-R project. The authors would also like to acknowledge to A. Fernández-Escandón and Jose Llueca for their help in the experimental work. They are also grateful to Neuvendis for supply the expansive agent used in this study.Peer reviewedElsevierMinisterio de Economía y Competitividad (España)Carballosa, Pedro [0000-0002-3717-7614]García Calvo, José Luis [0000-0002-0042-9822]Revuelta Crespo, David [0000-0003-0564-1926]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/219482reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/BIA2015-64363-Rhttps://doi.org/10.1016/j.cemconcomp.2019.103464Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2194822026-05-22T06:33:51Z
dc.title.none.fl_str_mv Influence of expansive calcium sulfoaluminate agent dosage on properties and microstructure of expansive self-compacting concretes
title Influence of expansive calcium sulfoaluminate agent dosage on properties and microstructure of expansive self-compacting concretes
spellingShingle Influence of expansive calcium sulfoaluminate agent dosage on properties and microstructure of expansive self-compacting concretes
Carballosa, Pedro
Expansive self-compacting concrete
Ettringite
MicrostructureFree expansion
Mechanical properties
title_short Influence of expansive calcium sulfoaluminate agent dosage on properties and microstructure of expansive self-compacting concretes
title_full Influence of expansive calcium sulfoaluminate agent dosage on properties and microstructure of expansive self-compacting concretes
title_fullStr Influence of expansive calcium sulfoaluminate agent dosage on properties and microstructure of expansive self-compacting concretes
title_full_unstemmed Influence of expansive calcium sulfoaluminate agent dosage on properties and microstructure of expansive self-compacting concretes
title_sort Influence of expansive calcium sulfoaluminate agent dosage on properties and microstructure of expansive self-compacting concretes
dc.creator.none.fl_str_mv Carballosa, Pedro
García Calvo, José Luis
Revuelta Crespo, David
author Carballosa, Pedro
author_facet Carballosa, Pedro
García Calvo, José Luis
Revuelta Crespo, David
author_role author
author2 García Calvo, José Luis
Revuelta Crespo, David
author2_role author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Carballosa, Pedro [0000-0002-3717-7614]
García Calvo, José Luis [0000-0002-0042-9822]
Revuelta Crespo, David [0000-0003-0564-1926]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Expansive self-compacting concrete
Ettringite
MicrostructureFree expansion
Mechanical properties
topic Expansive self-compacting concrete
Ettringite
MicrostructureFree expansion
Mechanical properties
description Expansive concretes based on the formation of ettringite from calcium sulfoaluminate agents are presented as an effective alternative to minimize the problems derived from shrinkage and low tensile strength at the early ages of the concrete. However, determining the mechanism responsible for the expansion is still a controversial issue today. In this study, the influence of three doses of expansive agent on fresh state and on compressive strength and magnitude of free expansion under two curing environments was evaluated on a reference mixture of self-compacting concrete (SCC). The microstructural evolution of the hydrates and anhydrous related with the expansive phenomena was also studied. From our observations it seems that an eminently amorphous ettringite is formed and that this ettringite would be strongly related to expansion. As a result, the influence of the ratio w/cementitious material and curing environment on the magnitude of the expansion as well as the influence of this on the mechanical properties of the SCCs was identified.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/219482
url http://hdl.handle.net/10261/219482
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/BIA2015-64363-R
https://doi.org/10.1016/j.cemconcomp.2019.103464
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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
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