ELECTROCHEMICAL INJECTION OF NANOPARTICLES INTO CONCRETE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F16%3A43902883" target="_blank" >RIV/60461373:22310/16:43902883 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21110/16:00301622

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

ELECTROCHEMICAL INJECTION OF NANOPARTICLES INTO CONCRETE

Popis výsledku v původním jazyce

In this contribution, the possibility of nanoparticle injection by electromigration, as a novel approach for concrete repair, is presented. The electromigration was employed to inject nanosilica particles and an organosiliconate into normal Portland cement concrete. Several different concentrations of solutions were tested. Incorporation of nanosilica to inner pore system and the effect on the densification were studied by means of SEM-EDS and accelerated chloride penetration tests on treated and control samples. It was found that nanosilica can penetrate a few millimeter zone in a reasonable time and further block chloride penetration. The effect is higher if a higher concentration of nanoparticles is used. Large decrease in chloride concentration in outer parts of concrete later exposed to accelerated chloride penetration test was achieved on samples treated with both nanosilica and organosiliconate solution. Several issues still remain open like particles agglomeration or the change in the subsequent chloride profile in the sample compared to natural diffusion or accelerated migration.

Název v anglickém jazyce

ELECTROCHEMICAL INJECTION OF NANOPARTICLES INTO CONCRETE

Popis výsledku anglicky

In this contribution, the possibility of nanoparticle injection by electromigration, as a novel approach for concrete repair, is presented. The electromigration was employed to inject nanosilica particles and an organosiliconate into normal Portland cement concrete. Several different concentrations of solutions were tested. Incorporation of nanosilica to inner pore system and the effect on the densification were studied by means of SEM-EDS and accelerated chloride penetration tests on treated and control samples. It was found that nanosilica can penetrate a few millimeter zone in a reasonable time and further block chloride penetration. The effect is higher if a higher concentration of nanoparticles is used. Large decrease in chloride concentration in outer parts of concrete later exposed to accelerated chloride penetration test was achieved on samples treated with both nanosilica and organosiliconate solution. Several issues still remain open like particles agglomeration or the change in the subsequent chloride profile in the sample compared to natural diffusion or accelerated migration.

Druh

D - Stať ve sborníku

CEP obor

JK - Koroze a povrchové úpravy materiálu

OECD FORD obor

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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

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

International RILEM Conference Materials Systems and Structures in Civil Engineering 2016 (MSSCE 2016) on Electrochemistry in Civil Engineering

ISBN

978-2-35158-176-6

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

81-87

Název nakladatele

RILEM Publications S.A.R.L.

Místo vydání

Bagneux

Místo konání akce

Lyngby

Datum konání akce

22. 8. 2016

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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