Concrete of tomorrow: corrosion performances in marine environment.
Résumé
Concrete is the most construction material used worldwide, but if often faces durability issues due to rebars corrosion, and cement production can be energy consuming. Attempts to improve its resilience versus corrosion while reducing its carbon footprint are ongoing at an international level. In this objective, in France within the frame of the national project PERFDUB, a series of reinforced concrete walls were cast with innovative concrete design, two shapes of rebars and two concrete covers. The standard performances of the different concrete mix designs were evaluated at a laboratory scale. Then the walls were exposed in the French La Rochelle harbor, in tidal zone in order to monitor the evolution of the corrosion of the bars for a period of twenty years. The first results of the electrochemical follow-up of these reinforced walls are presented in this paper.
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