Reinforcement Corrosion Testing and Modeling of Chloride Ion Diffusion to Concrete in High Temperature and Humidity Environment

The article presents the results of selected research carried out as part of the PBL project entitled: Development and verification of a model of chloride diffusion and migration processes in concrete structures under the conditions simulating a changeable climate impact. This project was co-financed under the project: “Silesian University of Technology as a Center for Modern Education based on research and innovation” - POWR-03.05.00-00-Z098/17-00, from the European Social Fund. The project was implemented in cooperation with three faculties of the Silesian University of Technology. From the Faculty of Civil Engineering, the main supervisor: Zofia Szweda and students: Natalia Strzoda, Mateusz Podgórny, Przemysław Toboła. From the Faculty of Electrical Engineering: tutor Artur Skórkowski and students: Marek Taraur, Wojciech Widuch. From the Faculty of Energy and Environmental Engineering, tutor Zbigniew Buliński and students Maciej Bara and Piotr Eliasz. The project was implemented from March 1, 2022 to June 27, 2022. As part of the project, a system for measuring, visualizing and analyzing such physical quantities as temperature, relative air humidity and CO₂ concentration level in a climatic chamber (purchased with project funds) for testing building materials was developed. The electrochemical impedance spectroscopy (EIS) method was used to check whether there were any changes caused by the development of corrosion in the tested samples stored inside and outside of the climatic chamber. A methodology for modeling transport phenomena in concrete was also developed.