Interfacial transition zone in mature fiber-reinforced concretes

The interfacial transition zone (ITZ) in concrete is the region of the cement paste that is disturbed by the presence of an aggregate or fiber. This work focuses on the ITZ around silica and dolomite grains and steel fibers. The analysis performed is based on: the macroscale properties of the specim...

ver descrição completa

Detalhes bibliográficos
Autores: Roig-Flores, M., Šimicevic, Filipa, Maricic, Ana, Serna, Pedro, Horvat, Marija
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/211589
Acesso em linha:http://hdl.handle.net/10261/211589
Access Level:acceso abierto
Palavra-chave:Aggregate-cement past ITZ boundary
Calcium silica hydrates
Fiber-cement paste ITZ boundary
Fiber-reinforced concretes
id ES_c6a85ed696ca6bfabae3708dca16cd5d
oai_identifier_str oai:digital.csic.es:10261/211589
network_acronym_str ES
network_name_str España
repository_id_str
spelling Interfacial transition zone in mature fiber-reinforced concretesRoig-Flores, M.Šimicevic, FilipaMaricic, AnaSerna, PedroHorvat, MarijaAggregate-cement past ITZ boundaryCalcium silica hydratesFiber-cement paste ITZ boundaryFiber-reinforced concretesThe interfacial transition zone (ITZ) in concrete is the region of the cement paste that is disturbed by the presence of an aggregate or fiber. This work focuses on the ITZ around silica and dolomite grains and steel fibers. The analysis performed is based on: the macroscale properties of the specimens; petrographic analyses with polarized microscopy; and qualitative and quantitative SEM analyses. The following types of concrete were tested: standard quality (SQ); high-quality with steel fibers (PFRC); and ultra-high-performance fiber-reinforced concrete (UHPFRC). The most important parameters affecting ITZ are the properties of the disturbing elements and the mixture composition of the concrete. In PFRC, a differentiated zone of thickness 20 μm (787.40 μin.) was observed around a dolomite grain, showing a preferential growth of Ca-based compounds. In UHPFRC, SEM-EDS analysis revealed C-S-H of lower Ca/Si ratios in the proximity of fibers and aggregates.Peer reviewedAmerican Concrete InstituteConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202018info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/211589reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2115892026-05-22T06:33:51Z
dc.title.none.fl_str_mv Interfacial transition zone in mature fiber-reinforced concretes
title Interfacial transition zone in mature fiber-reinforced concretes
spellingShingle Interfacial transition zone in mature fiber-reinforced concretes
Roig-Flores, M.
Aggregate-cement past ITZ boundary
Calcium silica hydrates
Fiber-cement paste ITZ boundary
Fiber-reinforced concretes
title_short Interfacial transition zone in mature fiber-reinforced concretes
title_full Interfacial transition zone in mature fiber-reinforced concretes
title_fullStr Interfacial transition zone in mature fiber-reinforced concretes
title_full_unstemmed Interfacial transition zone in mature fiber-reinforced concretes
title_sort Interfacial transition zone in mature fiber-reinforced concretes
dc.creator.none.fl_str_mv Roig-Flores, M.
Šimicevic, Filipa
Maricic, Ana
Serna, Pedro
Horvat, Marija
author Roig-Flores, M.
author_facet Roig-Flores, M.
Šimicevic, Filipa
Maricic, Ana
Serna, Pedro
Horvat, Marija
author_role author
author2 Šimicevic, Filipa
Maricic, Ana
Serna, Pedro
Horvat, Marija
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Aggregate-cement past ITZ boundary
Calcium silica hydrates
Fiber-cement paste ITZ boundary
Fiber-reinforced concretes
topic Aggregate-cement past ITZ boundary
Calcium silica hydrates
Fiber-cement paste ITZ boundary
Fiber-reinforced concretes
description The interfacial transition zone (ITZ) in concrete is the region of the cement paste that is disturbed by the presence of an aggregate or fiber. This work focuses on the ITZ around silica and dolomite grains and steel fibers. The analysis performed is based on: the macroscale properties of the specimens; petrographic analyses with polarized microscopy; and qualitative and quantitative SEM analyses. The following types of concrete were tested: standard quality (SQ); high-quality with steel fibers (PFRC); and ultra-high-performance fiber-reinforced concrete (UHPFRC). The most important parameters affecting ITZ are the properties of the disturbing elements and the mixture composition of the concrete. In PFRC, a differentiated zone of thickness 20 μm (787.40 μin.) was observed around a dolomite grain, showing a preferential growth of Ca-based compounds. In UHPFRC, SEM-EDS analysis revealed C-S-H of lower Ca/Si ratios in the proximity of fibers and aggregates.
publishDate 2018
dc.date.none.fl_str_mv 2018
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/10261/211589
url http://hdl.handle.net/10261/211589
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Concrete Institute
publisher.none.fl_str_mv American Concrete Institute
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
_version_ 1869419091427590144
score 15,812429

Registos relacionados