DIMINISHING CHLORIDE INDUCED STEEL CORROSION IN CONCRETE BY ELECTROMIGRATION OF NANOPARTICLES AND ITS MODELING

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F18%3A00325914" target="_blank" >RIV/68407700:21110/18:00325914 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

DIMINISHING CHLORIDE INDUCED STEEL CORROSION IN CONCRETE BY ELECTROMIGRATION OF NANOPARTICLES AND ITS MODELING

Original language description

Chloride induced corrosion is one of the most significant factors affecting reinforced concrete structural life. The corrosion process is initiated after depassivation of the steel due to e.g. concrete cracking, carbonation and/or presence of chloride ions. The corrosion can be then diminished by a few non-destructive ways. Electrochemical extraction of chlorides leads to lowering chloride concentrations at concrete cover. The extraction is only effective if chlorides did not pass rebars in a significant way. One the other hand corrosion inhibitors or nanoparticles can be driven towards reinforcement using the same electromigration principles [2,3]. The paper deals with experimental studies of nanoparticle electroinjection into concrete and shows a numerical framework used for modeling of both chlorides and nanoparticle migration in concrete. It is shown that nanoparticle treated samples exhibit increased resistance to chloride diffusion. The model is formulated using the Fick’s law, Nernst-Planck equation and Gauss law of electrostatics. Finite element approximation and the Galerkin-Petrov approach is used for solving practical examples of reinforced concrete structure. Natural diffusion of ions, accelerated extraction and injection in reinforced concrete are shown.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20101 - Civil engineering

Project

<a href="/en/project/GA16-11879S" target="_blank" >GA16-11879S: Rehabilitation of Reinforced Concrete Structures by Simultaneous Chloride Removal and Nanoparticle Injection</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů