Calibration of boundary conditions correlated to the diffusivity of chloride ions: An accurate study for random diffusivity
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.cemconcomp.2021.104346 http://hdl.handle.net/11449/222889 |
Resumo: | For reinforced concrete (RC) structures, the corrosion of the reinforced steel bars from chloride ions is a periodic risk. The chloride ions diffusion is governed by Fick’ laws, however, these equations can be applied under the condition that the diffusivity is constant in the time and space. In this way, the diffusion process and the relative scenario could be greatly simplified. In this paper, a more complete non-constant multifactorial diffusivity is proposed accounting the water/cement ratio, chloride binding, temperature, age, deformation, damage, humidity. To consider a non-constant diffusivity, the use of numerical solutions is necessary. For this, Hermite polynomials (HPs) have been implemented for 1D and 2D model. Specified boundary conditions for this application have been calibrated to solve partial differential equations (PDEs) for random fluctuation diffusivity. Results show that traditional approaches bad estimate the chloride concentration for long scenarios at certain depths. |
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Repositório Institucional da UNESP |
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Calibration of boundary conditions correlated to the diffusivity of chloride ions: An accurate study for random diffusivityBoundary conditionsChloride diffusionConcrete structuresHermite polynomialsNon-constant diffusivityFor reinforced concrete (RC) structures, the corrosion of the reinforced steel bars from chloride ions is a periodic risk. The chloride ions diffusion is governed by Fick’ laws, however, these equations can be applied under the condition that the diffusivity is constant in the time and space. In this way, the diffusion process and the relative scenario could be greatly simplified. In this paper, a more complete non-constant multifactorial diffusivity is proposed accounting the water/cement ratio, chloride binding, temperature, age, deformation, damage, humidity. To consider a non-constant diffusivity, the use of numerical solutions is necessary. For this, Hermite polynomials (HPs) have been implemented for 1D and 2D model. Specified boundary conditions for this application have been calibrated to solve partial differential equations (PDEs) for random fluctuation diffusivity. Results show that traditional approaches bad estimate the chloride concentration for long scenarios at certain depths.Itecons - Institute for Research and Technological Development in Construction Energy Environment and Sustainability, Rua Pedro Hispano s/nSchool of Civil Engineering São Paulo State University (UNESP), 14-01 Eng. Luís Edmundo Carrijo Coube AvenueSchool of Civil Engineering São Paulo State University (UNESP), 14-01 Eng. Luís Edmundo Carrijo Coube AvenueEnvironment and SustainabilityUniversidade Estadual Paulista (UNESP)Zacchei, EnricoGorla Nogueira, Caio [UNESP]2022-04-28T19:47:17Z2022-04-28T19:47:17Z2022-02-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.cemconcomp.2021.104346Cement and Concrete Composites, v. 126.0958-9465http://hdl.handle.net/11449/22288910.1016/j.cemconcomp.2021.1043462-s2.0-85119408071Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengCement and Concrete Compositesinfo:eu-repo/semantics/openAccess2022-04-28T19:47:17Zoai:repositorio.unesp.br:11449/222889Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-28T19:47:17Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Calibration of boundary conditions correlated to the diffusivity of chloride ions: An accurate study for random diffusivity |
title |
Calibration of boundary conditions correlated to the diffusivity of chloride ions: An accurate study for random diffusivity |
spellingShingle |
Calibration of boundary conditions correlated to the diffusivity of chloride ions: An accurate study for random diffusivity Zacchei, Enrico Boundary conditions Chloride diffusion Concrete structures Hermite polynomials Non-constant diffusivity |
title_short |
Calibration of boundary conditions correlated to the diffusivity of chloride ions: An accurate study for random diffusivity |
title_full |
Calibration of boundary conditions correlated to the diffusivity of chloride ions: An accurate study for random diffusivity |
title_fullStr |
Calibration of boundary conditions correlated to the diffusivity of chloride ions: An accurate study for random diffusivity |
title_full_unstemmed |
Calibration of boundary conditions correlated to the diffusivity of chloride ions: An accurate study for random diffusivity |
title_sort |
Calibration of boundary conditions correlated to the diffusivity of chloride ions: An accurate study for random diffusivity |
author |
Zacchei, Enrico |
author_facet |
Zacchei, Enrico Gorla Nogueira, Caio [UNESP] |
author_role |
author |
author2 |
Gorla Nogueira, Caio [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Environment and Sustainability Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Zacchei, Enrico Gorla Nogueira, Caio [UNESP] |
dc.subject.por.fl_str_mv |
Boundary conditions Chloride diffusion Concrete structures Hermite polynomials Non-constant diffusivity |
topic |
Boundary conditions Chloride diffusion Concrete structures Hermite polynomials Non-constant diffusivity |
description |
For reinforced concrete (RC) structures, the corrosion of the reinforced steel bars from chloride ions is a periodic risk. The chloride ions diffusion is governed by Fick’ laws, however, these equations can be applied under the condition that the diffusivity is constant in the time and space. In this way, the diffusion process and the relative scenario could be greatly simplified. In this paper, a more complete non-constant multifactorial diffusivity is proposed accounting the water/cement ratio, chloride binding, temperature, age, deformation, damage, humidity. To consider a non-constant diffusivity, the use of numerical solutions is necessary. For this, Hermite polynomials (HPs) have been implemented for 1D and 2D model. Specified boundary conditions for this application have been calibrated to solve partial differential equations (PDEs) for random fluctuation diffusivity. Results show that traditional approaches bad estimate the chloride concentration for long scenarios at certain depths. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-04-28T19:47:17Z 2022-04-28T19:47:17Z 2022-02-01 |
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 |
http://dx.doi.org/10.1016/j.cemconcomp.2021.104346 Cement and Concrete Composites, v. 126. 0958-9465 http://hdl.handle.net/11449/222889 10.1016/j.cemconcomp.2021.104346 2-s2.0-85119408071 |
url |
http://dx.doi.org/10.1016/j.cemconcomp.2021.104346 http://hdl.handle.net/11449/222889 |
identifier_str_mv |
Cement and Concrete Composites, v. 126. 0958-9465 10.1016/j.cemconcomp.2021.104346 2-s2.0-85119408071 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Cement and Concrete Composites |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965394924994560 |