Corrosion properties and bond strength in concrete conventional prestressing steel reinforcement with plasma sprayed Si-SiC-SiO2 coating

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F24%3A00616850" target="_blank" >RIV/61389021:_____/24:00616850 - isvavai.cz</a>

Výsledek na webu

<a href="https://webadmin.icct.cz/Amca-ICCT/media/content/2024/documents/Book_of_abstracts_-ICCT2024.pdf" target="_blank" >https://webadmin.icct.cz/Amca-ICCT/media/content/2024/documents/Book_of_abstracts_-ICCT2024.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Corrosion properties and bond strength in concrete conventional prestressing steel reinforcement with plasma sprayed Si-SiC-SiO2 coating

Popis výsledku v původním jazyce

Corrosion damage to conventional prestressing reinforcement placed in a grout channel stimulated with chloride anions can lead to unpredictable collapse of reinforced concrete structures. An expert report previously carried out on the condition of the Troja footbridge after its collapse indicated that corrosion of the prestressing reinforcement stimulated by chloride anions was the cause. In this paper, the possibility of applying corrosion protection in the form of a protective SiC-based plasma coating is studied. The barrier protection properties of the silicon carbide coating partially incongruently decomposed into elemental silicon and amorphous SiO2 were comparatively verified in hydrochloric acid - AAS solution by analyzing the iron content of the test solution after the exposure time. Furthermore, the bond strength of the reinforcement coated in this way with concrete of normal strength was verified by means of a pull-out test. Testing was carried out on standard cubic specimens with standard uncoated and ceramic coated reinforcement applied. Interpretation of the bond strength test results included measurement of changes in surface roughness (Ra) and contact surface angle of the coated ceramic.

Název v anglickém jazyce

Corrosion properties and bond strength in concrete conventional prestressing steel reinforcement with plasma sprayed Si-SiC-SiO2 coating

Popis výsledku anglicky

Corrosion damage to conventional prestressing reinforcement placed in a grout channel stimulated with chloride anions can lead to unpredictable collapse of reinforced concrete structures. An expert report previously carried out on the condition of the Troja footbridge after its collapse indicated that corrosion of the prestressing reinforcement stimulated by chloride anions was the cause. In this paper, the possibility of applying corrosion protection in the form of a protective SiC-based plasma coating is studied. The barrier protection properties of the silicon carbide coating partially incongruently decomposed into elemental silicon and amorphous SiO2 were comparatively verified in hydrochloric acid - AAS solution by analyzing the iron content of the test solution after the exposure time. Furthermore, the bond strength of the reinforcement coated in this way with concrete of normal strength was verified by means of a pull-out test. Testing was carried out on standard cubic specimens with standard uncoated and ceramic coated reinforcement applied. Interpretation of the bond strength test results included measurement of changes in surface roughness (Ra) and contact surface angle of the coated ceramic.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20506 - Coating and films

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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