from the conferences organized by TANGER Ltd.
This poster focuses on the characterization of chloride migration from the environment into different types of concrete. Chloride diffusion into reinforced concrete plays an important role in the degradation of reinforced concrete structures. Three types of concrete were tested: conventional concrete, conventional concrete with Portland cement and concrete with the addition of silica fume. These additions led to a reduction in the rate of chloride diffusion. The diffusion rate was determined by means of an immersion test in a solution containing 3% chloride ions. Electrochemical impedance spectroscopy (EIS) was used to further describe the microstructure of the concrete. Open porosity was quantified based on the analysis of the data obtained and these results were correlated with the rate of chloride diffusion. The positive effect of the additives, consisting of limiting chloride migration, was confirmed by the reduction of pore permeability as seen in the EIS data.
Keywords: Chlorides diffusion, steel reinforcement corrosion, concrete additives, silica fume, fly ash© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.