3D X-ray Micro-CT Analysis of Rebar Corrosion in Reinforced Concrete Subjected to a Chloride-Induced Environment - Publication - MOST Wiedzy

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3D X-ray Micro-CT Analysis of Rebar Corrosion in Reinforced Concrete Subjected to a Chloride-Induced Environment

Abstract

The paper presents experimental investigations of the concrete cover protective ability to coun-teract rebar corrosion in reinforced concrete cubes. To study and quantify the consequences of corrosion a reinforced concrete sample was subjected to chloride-induced environment in order to get corroded and combined with un-corroded sample. Chloride-accelerated technique can in-duce a high degree of corrosion within at a controlled time. Moreover, detailed and thorough experimental measurements and analyses of reinforcement loss due to corrosion and its influ-ence on concrete microstructure was studied by means of 3D X-Ray micro-computed tomogra-phy. Whereas rebar outside the concrete was heavily corroded due to chloride-accelerated test, only local surface corrosion products appeared inside the concrete. It turned out, that in spite of accelerated corrosion environment, concrete cover shows protective ability to counteract rein-forcing steel corrosion mechanism. Moreover, bond strength between reinforcement rebar and concrete was not visibly affected since the failure force in pull-out test and failure mechanisms, observed by 3D X-Ray micro-CT, were similar for corroded and un-corroded sample. Failure took place due to presence of radial cracks with the maximum width equal approximately 0,25 mm.

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Keywords

Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
MOLECULES no. 27,
ISSN: 1420-3049
Language:
English
Publication year:
2022
Bibliographic description:
Skarżyński Ł., Kibort K., Małachowska A.: 3D X-ray Micro-CT Analysis of Rebar Corrosion in Reinforced Concrete Subjected to a Chloride-Induced Environment// MOLECULES -Vol. 27,iss. 1 (2021), s.192-
DOI:
Digital Object Identifier (open in new tab) 10.3390/molecules27010192
Verified by:
Gdańsk University of Technology

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