MODELING OF CHLORIDE MIGRATION IN CONCRETE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F17%3A00314698" target="_blank" >RIV/68407700:21110/17:00314698 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

MODELING OF CHLORIDE MIGRATION IN CONCRETE

Popis výsledku v původním jazyce

In many cases, reinforced concrete structures are influenced by penetration of deteriorating salts that cause corrosion of the steel reinforcement. From a micro-structural point of view, concrete is a heterogeneous composite with tortuous pore microstructure with partially or fully saturated pores. Water in pores allows salt ions to be dissolved and transported towards reinforcement. Different mechanisms such as diffusion or convection take place. The ion convection can be caused by electromotive force acting on charged particles and is caused by an electrical potential gradient. This contribution is devoted to modeling of the dffusion-convection problem applied to chloride migration in concrete. The influence of an external electric field is studied and problems of chloride penetration and extraction are solved. It is shown in the paper that the electric field accelerates the chloride migration by multiple times compared to natural diffusion and can be used as an efficient treatment for rehabilitation of reinforced concrete structures affected by chloride attack.

Název v anglickém jazyce

MODELING OF CHLORIDE MIGRATION IN CONCRETE

Popis výsledku anglicky

In many cases, reinforced concrete structures are influenced by penetration of deteriorating salts that cause corrosion of the steel reinforcement. From a micro-structural point of view, concrete is a heterogeneous composite with tortuous pore microstructure with partially or fully saturated pores. Water in pores allows salt ions to be dissolved and transported towards reinforcement. Different mechanisms such as diffusion or convection take place. The ion convection can be caused by electromotive force acting on charged particles and is caused by an electrical potential gradient. This contribution is devoted to modeling of the dffusion-convection problem applied to chloride migration in concrete. The influence of an external electric field is studied and problems of chloride penetration and extraction are solved. It is shown in the paper that the electric field accelerates the chloride migration by multiple times compared to natural diffusion and can be used as an efficient treatment for rehabilitation of reinforced concrete structures affected by chloride attack.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

<a href="/cs/project/GA16-11879S" target="_blank" >GA16-11879S: Obnova železobetonových konstrukcí pomocí simultánního odstranění chloridů a injektování nanočástic</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Engineering Mechanics 2017 - Book of full texts

ISBN

978-80-214-5497-2

ISSN

1805-8248

e-ISSN

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Počet stran výsledku

4

Strana od-do

710-713

Název nakladatele

Brno University of Technology

Místo vydání

Brno

Místo konání akce

Svratka

Datum konání akce

15. 5. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000411657600167