Evaluation of Internal and Superficial Self-Healing of Cracks in Concrete with Crystalline Admixtures
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/224116 |
Resumo: | Reinforced concrete structures are prone to cracking. The development of cementitious matrices with the capacity for self-healing soon after these cracks appear represents savings with inspections and repairs of the structures. Self-healing can be stimulated with the use of crystalline admixtures. Such materials easily react with water and increase the density of C-S-H (hydrated-calcium-silicate), forming insoluble deposits blocking existing pores and cracks. In this research, self-healing in concrete cracks was evaluated using three di erent crystalline admixtures, submitted to two and six wetting–drying cycles. The e ciency of self-healing was evaluated by optical microscopy and using the chloride di usion test, which allowed calculating the predicted useful life of the concretes. The results highlight two important findings: (i) in optical microscopy, crystalline admixtures were not e cient in promoting self-healing on the surface of cracks in any of the studied concretes; (ii) the passage of chlorides by di usion was lower for concretes with crystalline admixtures compared to the reference, showing better internal healing of these materials and, consequently, greater prediction of the concrete’s useful life. |
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Ziegler, FabianaMasuero, Angela BorgesPagnussat, Daniel TregnagoDal Molin, Denise Carpena Coitinho2021-07-17T04:43:47Z20201996-1944http://hdl.handle.net/10183/224116001119593Reinforced concrete structures are prone to cracking. The development of cementitious matrices with the capacity for self-healing soon after these cracks appear represents savings with inspections and repairs of the structures. Self-healing can be stimulated with the use of crystalline admixtures. Such materials easily react with water and increase the density of C-S-H (hydrated-calcium-silicate), forming insoluble deposits blocking existing pores and cracks. In this research, self-healing in concrete cracks was evaluated using three di erent crystalline admixtures, submitted to two and six wetting–drying cycles. The e ciency of self-healing was evaluated by optical microscopy and using the chloride di usion test, which allowed calculating the predicted useful life of the concretes. The results highlight two important findings: (i) in optical microscopy, crystalline admixtures were not e cient in promoting self-healing on the surface of cracks in any of the studied concretes; (ii) the passage of chlorides by di usion was lower for concretes with crystalline admixtures compared to the reference, showing better internal healing of these materials and, consequently, greater prediction of the concrete’s useful life.application/pdfengMaterials [recurso eletrônico]. Basel, Switzerland. Vol. 13, no. 21 (2020), 18 p.Concreto armadoCloretoSelf-healing concreteEvaluation of Internal and Superficial Self-Healing of Cracks in Concrete with Crystalline AdmixturesEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001119593.pdf.txt001119593.pdf.txtExtracted Texttext/plain78031http://www.lume.ufrgs.br/bitstream/10183/224116/2/001119593.pdf.txt11145c29edc80101e2c3b2c62b0cb576MD52ORIGINAL001119593.pdfTexto completo (inglês)application/pdf7773738http://www.lume.ufrgs.br/bitstream/10183/224116/1/001119593.pdf89c1433719329b68d92fd20205dfe579MD5110183/2241162021-08-18 04:35:08.217317oai:www.lume.ufrgs.br:10183/224116Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-08-18T07:35:08Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Evaluation of Internal and Superficial Self-Healing of Cracks in Concrete with Crystalline Admixtures |
title |
Evaluation of Internal and Superficial Self-Healing of Cracks in Concrete with Crystalline Admixtures |
spellingShingle |
Evaluation of Internal and Superficial Self-Healing of Cracks in Concrete with Crystalline Admixtures Ziegler, Fabiana Concreto armado Cloreto Self-healing concrete |
title_short |
Evaluation of Internal and Superficial Self-Healing of Cracks in Concrete with Crystalline Admixtures |
title_full |
Evaluation of Internal and Superficial Self-Healing of Cracks in Concrete with Crystalline Admixtures |
title_fullStr |
Evaluation of Internal and Superficial Self-Healing of Cracks in Concrete with Crystalline Admixtures |
title_full_unstemmed |
Evaluation of Internal and Superficial Self-Healing of Cracks in Concrete with Crystalline Admixtures |
title_sort |
Evaluation of Internal and Superficial Self-Healing of Cracks in Concrete with Crystalline Admixtures |
author |
Ziegler, Fabiana |
author_facet |
Ziegler, Fabiana Masuero, Angela Borges Pagnussat, Daniel Tregnago Dal Molin, Denise Carpena Coitinho |
author_role |
author |
author2 |
Masuero, Angela Borges Pagnussat, Daniel Tregnago Dal Molin, Denise Carpena Coitinho |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Ziegler, Fabiana Masuero, Angela Borges Pagnussat, Daniel Tregnago Dal Molin, Denise Carpena Coitinho |
dc.subject.por.fl_str_mv |
Concreto armado Cloreto |
topic |
Concreto armado Cloreto Self-healing concrete |
dc.subject.eng.fl_str_mv |
Self-healing concrete |
description |
Reinforced concrete structures are prone to cracking. The development of cementitious matrices with the capacity for self-healing soon after these cracks appear represents savings with inspections and repairs of the structures. Self-healing can be stimulated with the use of crystalline admixtures. Such materials easily react with water and increase the density of C-S-H (hydrated-calcium-silicate), forming insoluble deposits blocking existing pores and cracks. In this research, self-healing in concrete cracks was evaluated using three di erent crystalline admixtures, submitted to two and six wetting–drying cycles. The e ciency of self-healing was evaluated by optical microscopy and using the chloride di usion test, which allowed calculating the predicted useful life of the concretes. The results highlight two important findings: (i) in optical microscopy, crystalline admixtures were not e cient in promoting self-healing on the surface of cracks in any of the studied concretes; (ii) the passage of chlorides by di usion was lower for concretes with crystalline admixtures compared to the reference, showing better internal healing of these materials and, consequently, greater prediction of the concrete’s useful life. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020 |
dc.date.accessioned.fl_str_mv |
2021-07-17T04:43:47Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/224116 |
dc.identifier.issn.pt_BR.fl_str_mv |
1996-1944 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001119593 |
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1996-1944 001119593 |
url |
http://hdl.handle.net/10183/224116 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Materials [recurso eletrônico]. Basel, Switzerland. Vol. 13, no. 21 (2020), 18 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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