Durability of an UHPFRC under mechanical and chloride loads
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://hdl.handle.net/1822/76066 |
Resumo: | The high cost of UHPFRC is a limitation on the practical application in real construction projects. However, a very competitive UHPFRC approach is the hybrid structural elements, where thin layers of UHPFRC are employed to rehabilitate/strengthen damage cover concrete. New layers subjected to harsh conditions (loads and/or environmental) can eventually crack under service conditions, changing the local transport properties and thus, a faster ingress of detrimental substances occur, such as chlorides ions. Most of the studies on chloride penetration in UHPFRC have focused on determining the transport properties of sound, non-cracked specimens. Thus, an experimental campaign was carried out to assess chloride ingress in loaded and/or cracked UHPFRC and the effect of such ions on mechanical performance. Typical service cracks patterns were imposed on UHPFRC specimens and then exposed to wetting?drying cycles in a chloride solution. After 1-year chloride exposure, UHPFRC specimens were in good condition with no significant losses in flexural strength; however, stiffness might be affected. The chloride contents up to 20 mm depth were superior to the European standards critical chloride content. A minimum cover depth of 20 mm of new UHPFRC is recommended to protect a concrete substrate in hybrid structures for exposure classes XS3. |
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Durability of an UHPFRC under mechanical and chloride loadsBendingChlorides ingressCracked UHPFRCDurabilityUltra-high performance fibre reinforced cementitious composites (UHPFRC)Cementitious composites (UHPFRC)Ultra-high performance fibre reinforcedScience & TechnologyThe high cost of UHPFRC is a limitation on the practical application in real construction projects. However, a very competitive UHPFRC approach is the hybrid structural elements, where thin layers of UHPFRC are employed to rehabilitate/strengthen damage cover concrete. New layers subjected to harsh conditions (loads and/or environmental) can eventually crack under service conditions, changing the local transport properties and thus, a faster ingress of detrimental substances occur, such as chlorides ions. Most of the studies on chloride penetration in UHPFRC have focused on determining the transport properties of sound, non-cracked specimens. Thus, an experimental campaign was carried out to assess chloride ingress in loaded and/or cracked UHPFRC and the effect of such ions on mechanical performance. Typical service cracks patterns were imposed on UHPFRC specimens and then exposed to wetting?drying cycles in a chloride solution. After 1-year chloride exposure, UHPFRC specimens were in good condition with no significant losses in flexural strength; however, stiffness might be affected. The chloride contents up to 20 mm depth were superior to the European standards critical chloride content. A minimum cover depth of 20 mm of new UHPFRC is recommended to protect a concrete substrate in hybrid structures for exposure classes XS3.This work was financially supported by: Base Funding - UIDB/04708/2020 and Programmatic Funding - UIDP/04708/2020 of the CONSTRUCT - Instituto de I&D em Estruturas e Construções - by national funds through the FCT/MCTES (PIDDAC).; by the project POCI01-0145-FEDER-031777 – “UHPGRADE – Next generation of ultra-high performance fibre-reinforced cement based composites for rehabilitation and strengthening of the existing infrastructure” funded by FEDER funds through COMPETE2020 – Programa Operacional Competitividade e Internacionalização (POCI) and by national funds (PIDDAC) through FCT/MCTES; and by FCT – Fundação para a Ciência e a Tecnologia through the PhD scholarship PD/BD/113636/2015, attributed within the Doctoral Program in Eco-Efficient Construction and Rehabilitation (EcoCoRe). Stefan Chaves Figueiredo would like to acknowledge the funding from Science without Borders from the National Council for Scientific and Technological Development of Brazil (201620/2014-6).ElsevierUniversidade do MinhoMatos, Ana MafaldaFigueiredo, Stefan ChavesNunes, SandraSchlangen, ErikAguiar, J. L. Barroso de2021-122021-12-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/76066engMatos A. M., Figueiredo S. C., Nunes S., Schlangen E., Aguiar J. B. Durability of an UHPFRC under mechanical and chloride loads, Construction and Building Materials, Vol. 311 , doi:10.1016/j.conbuildmat.2021.125223, 20210950-061810.1016/j.conbuildmat.2021.125223125223https://www.sciencedirect.com/science/article/pii/S0950061821029664info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-13T01:24:32Zoai:repositorium.sdum.uminho.pt:1822/76066Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:12:57.528168Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Durability of an UHPFRC under mechanical and chloride loads |
title |
Durability of an UHPFRC under mechanical and chloride loads |
spellingShingle |
Durability of an UHPFRC under mechanical and chloride loads Matos, Ana Mafalda Bending Chlorides ingress Cracked UHPFRC Durability Ultra-high performance fibre reinforced cementitious composites (UHPFRC) Cementitious composites (UHPFRC) Ultra-high performance fibre reinforced Science & Technology |
title_short |
Durability of an UHPFRC under mechanical and chloride loads |
title_full |
Durability of an UHPFRC under mechanical and chloride loads |
title_fullStr |
Durability of an UHPFRC under mechanical and chloride loads |
title_full_unstemmed |
Durability of an UHPFRC under mechanical and chloride loads |
title_sort |
Durability of an UHPFRC under mechanical and chloride loads |
author |
Matos, Ana Mafalda |
author_facet |
Matos, Ana Mafalda Figueiredo, Stefan Chaves Nunes, Sandra Schlangen, Erik Aguiar, J. L. Barroso de |
author_role |
author |
author2 |
Figueiredo, Stefan Chaves Nunes, Sandra Schlangen, Erik Aguiar, J. L. Barroso de |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Matos, Ana Mafalda Figueiredo, Stefan Chaves Nunes, Sandra Schlangen, Erik Aguiar, J. L. Barroso de |
dc.subject.por.fl_str_mv |
Bending Chlorides ingress Cracked UHPFRC Durability Ultra-high performance fibre reinforced cementitious composites (UHPFRC) Cementitious composites (UHPFRC) Ultra-high performance fibre reinforced Science & Technology |
topic |
Bending Chlorides ingress Cracked UHPFRC Durability Ultra-high performance fibre reinforced cementitious composites (UHPFRC) Cementitious composites (UHPFRC) Ultra-high performance fibre reinforced Science & Technology |
description |
The high cost of UHPFRC is a limitation on the practical application in real construction projects. However, a very competitive UHPFRC approach is the hybrid structural elements, where thin layers of UHPFRC are employed to rehabilitate/strengthen damage cover concrete. New layers subjected to harsh conditions (loads and/or environmental) can eventually crack under service conditions, changing the local transport properties and thus, a faster ingress of detrimental substances occur, such as chlorides ions. Most of the studies on chloride penetration in UHPFRC have focused on determining the transport properties of sound, non-cracked specimens. Thus, an experimental campaign was carried out to assess chloride ingress in loaded and/or cracked UHPFRC and the effect of such ions on mechanical performance. Typical service cracks patterns were imposed on UHPFRC specimens and then exposed to wetting?drying cycles in a chloride solution. After 1-year chloride exposure, UHPFRC specimens were in good condition with no significant losses in flexural strength; however, stiffness might be affected. The chloride contents up to 20 mm depth were superior to the European standards critical chloride content. A minimum cover depth of 20 mm of new UHPFRC is recommended to protect a concrete substrate in hybrid structures for exposure classes XS3. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-12 2021-12-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://hdl.handle.net/1822/76066 |
url |
https://hdl.handle.net/1822/76066 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Matos A. M., Figueiredo S. C., Nunes S., Schlangen E., Aguiar J. B. Durability of an UHPFRC under mechanical and chloride loads, Construction and Building Materials, Vol. 311 , doi:10.1016/j.conbuildmat.2021.125223, 2021 0950-0618 10.1016/j.conbuildmat.2021.125223 125223 https://www.sciencedirect.com/science/article/pii/S0950061821029664 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799132565937848320 |