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Calibration of boundary conditions correlated to the diffusivity of chloride ions: An accurate study for random diffusivity

dc.contributor.authorZacchei, Enrico
dc.contributor.authorGorla Nogueira, Caio [UNESP]
dc.contributor.institutionEnvironment and Sustainability
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-28T19:47:17Z
dc.date.available2022-04-28T19:47:17Z
dc.date.issued2022-02-01
dc.description.abstractFor 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.en
dc.description.affiliationItecons - Institute for Research and Technological Development in Construction Energy Environment and Sustainability, Rua Pedro Hispano s/n
dc.description.affiliationSchool of Civil Engineering São Paulo State University (UNESP), 14-01 Eng. Luís Edmundo Carrijo Coube Avenue
dc.description.affiliationUnespSchool of Civil Engineering São Paulo State University (UNESP), 14-01 Eng. Luís Edmundo Carrijo Coube Avenue
dc.identifierhttp://dx.doi.org/10.1016/j.cemconcomp.2021.104346
dc.identifier.citationCement and Concrete Composites, v. 126.
dc.identifier.doi10.1016/j.cemconcomp.2021.104346
dc.identifier.issn0958-9465
dc.identifier.scopus2-s2.0-85119408071
dc.identifier.urihttp://hdl.handle.net/11449/222889
dc.language.isoeng
dc.relation.ispartofCement and Concrete Composites
dc.sourceScopus
dc.subjectBoundary conditions
dc.subjectChloride diffusion
dc.subjectConcrete structures
dc.subjectHermite polynomials
dc.subjectNon-constant diffusivity
dc.titleCalibration of boundary conditions correlated to the diffusivity of chloride ions: An accurate study for random diffusivityen
dc.typeArtigo
unesp.author.orcid0000-0003-2537-0860[1]

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