Consolidation of artificial decayed portland cement mortars with an alkoxysilane-based impregnation treatment and its influence on mineralogy and pore structure

Surface treatments, especially hydrophobic agents to prevent water ingress and consolidants able to fill decay-induced cracks, are often proposed as a method for preserving stone cultural heritage, however its use to protect concrete heritage is much less common. New products, specifically designed...

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Autores: García-Lodeiro, Inés, Zarzuela, R., Mosquera, M.J., Blanco-Varela, María Teresa
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/257471
Acceso en línea:http://hdl.handle.net/10261/257471
Access Level:acceso abierto
Palabra clave:Consolidation
Alkoxysilane
Penetration depth
Porosity
C-S-H gel
Mechanical strength
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spelling Consolidation of artificial decayed portland cement mortars with an alkoxysilane-based impregnation treatment and its influence on mineralogy and pore structureGarcía-Lodeiro, InésZarzuela, R.Mosquera, M.J.Blanco-Varela, María TeresaConsolidationAlkoxysilanePenetration depthPorosityC-S-H gelMechanical strengthSurface treatments, especially hydrophobic agents to prevent water ingress and consolidants able to fill decay-induced cracks, are often proposed as a method for preserving stone cultural heritage, however its use to protect concrete heritage is much less common. New products, specifically designed for concrete, have been developed. These products are based on alkoxysilanes that interact directly with the products of portland cement (OPC) hydration (essentially Ca(OH) and C-S-H) to generate additional C-S-H gel. This study assesses the effect of an impregnation treatment, based on alkosysilanes, on artificially decayed cement mortars, in terms of product penetration depth, changes in the porosity of mortars and changes in its mechanical strengths. Reduced porosity and enhanced mechanical strength attested to treatment efficacy. Substrate porosity and pore size distribution were not the only factors found to condition treatment effectiveness, however, mineralogical changes caused by the deterioration processes (such as the presence or absence of portlandite, or the presence of salts) modify the sol gelling time and the substrate surface energy, impacting treatment penetration depth.This work has received funding from the European Union's Horizon 2020 - Research and Innovation Framework Programme under grant agreement No 760858 (Innovaconcrete project). Funding from the Regional Government of Madrid (TopHeritage-CM; S2018/NMT_4372) is also gratefully acknowledged. Finally, the support by the Spanish Government/FEDER-EU (MAT 2017-84228-R) is also acknowledged.ElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2022202220212022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/257471reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/H2020/760858http://dx.doi.org/10.1016/j.conbuildmat.2021.124532Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2574712026-05-22T06:33:51Z
dc.title.none.fl_str_mv Consolidation of artificial decayed portland cement mortars with an alkoxysilane-based impregnation treatment and its influence on mineralogy and pore structure
title Consolidation of artificial decayed portland cement mortars with an alkoxysilane-based impregnation treatment and its influence on mineralogy and pore structure
spellingShingle Consolidation of artificial decayed portland cement mortars with an alkoxysilane-based impregnation treatment and its influence on mineralogy and pore structure
García-Lodeiro, Inés
Consolidation
Alkoxysilane
Penetration depth
Porosity
C-S-H gel
Mechanical strength
title_short Consolidation of artificial decayed portland cement mortars with an alkoxysilane-based impregnation treatment and its influence on mineralogy and pore structure
title_full Consolidation of artificial decayed portland cement mortars with an alkoxysilane-based impregnation treatment and its influence on mineralogy and pore structure
title_fullStr Consolidation of artificial decayed portland cement mortars with an alkoxysilane-based impregnation treatment and its influence on mineralogy and pore structure
title_full_unstemmed Consolidation of artificial decayed portland cement mortars with an alkoxysilane-based impregnation treatment and its influence on mineralogy and pore structure
title_sort Consolidation of artificial decayed portland cement mortars with an alkoxysilane-based impregnation treatment and its influence on mineralogy and pore structure
dc.creator.none.fl_str_mv García-Lodeiro, Inés
Zarzuela, R.
Mosquera, M.J.
Blanco-Varela, María Teresa
author García-Lodeiro, Inés
author_facet García-Lodeiro, Inés
Zarzuela, R.
Mosquera, M.J.
Blanco-Varela, María Teresa
author_role author
author2 Zarzuela, R.
Mosquera, M.J.
Blanco-Varela, María Teresa
author2_role author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Consolidation
Alkoxysilane
Penetration depth
Porosity
C-S-H gel
Mechanical strength
topic Consolidation
Alkoxysilane
Penetration depth
Porosity
C-S-H gel
Mechanical strength
description Surface treatments, especially hydrophobic agents to prevent water ingress and consolidants able to fill decay-induced cracks, are often proposed as a method for preserving stone cultural heritage, however its use to protect concrete heritage is much less common. New products, specifically designed for concrete, have been developed. These products are based on alkoxysilanes that interact directly with the products of portland cement (OPC) hydration (essentially Ca(OH) and C-S-H) to generate additional C-S-H gel. This study assesses the effect of an impregnation treatment, based on alkosysilanes, on artificially decayed cement mortars, in terms of product penetration depth, changes in the porosity of mortars and changes in its mechanical strengths. Reduced porosity and enhanced mechanical strength attested to treatment efficacy. Substrate porosity and pore size distribution were not the only factors found to condition treatment effectiveness, however, mineralogical changes caused by the deterioration processes (such as the presence or absence of portlandite, or the presence of salts) modify the sol gelling time and the substrate surface energy, impacting treatment penetration depth.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/257471
url http://hdl.handle.net/10261/257471
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/EC/H2020/760858
http://dx.doi.org/10.1016/j.conbuildmat.2021.124532
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
repository.mail.fl_str_mv
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