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.
Authors
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.3390/molecules27010192
- Category
- Publikacja w czasopiśmie
- Type
- artykuły w czasopismach
- Language
- angielski
- Publication year
- 2022
