Performance-based evaluation of flash-metakaolin as cement replacement in marine structures – Case of chloride migration and corrosion

In order to increase the durability of concrete in maritime environments, it is often recommended use supplementary cementing materials such as silica fume or blast furnace slag. Metakaolin, even low purity, also allows a significant improvement chloride diffusion. The aim this work was evaluate characteristics concretes based on flash metakaolin when exposed marine environment. Concretes CEM I cement (more than 95% clinker) II/A and were compared used context (SR cement). results show that substitution for allowed reduction coefficient migration into cementitious paste one hand and, other hand, gave similar those sulfate resistant cements with C3A content. Then, tests accelerated corrosion confirmed beneficial effect context. Finally, predictive model estimate lifespan mixtures ions. showed could significantly structures.