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- W3091994995 abstract "In order to increase the durability of concrete in maritime environments, it is often recommended to use supplementary cementing materials such as silica fume or blast furnace slag. Metakaolin, even of low purity, also allows a significant improvement of the chloride diffusion. The aim of this work was to evaluate the characteristics of concretes based on flash metakaolin when exposed to a marine environment. Concretes based on CEM I cement (more than 95% of clinker) or CEM II/A cement and metakaolin were compared to a cement often used in a marine context (SR cement). The results show that a substitution of metakaolin for CEM I or CEM II/A allowed a reduction of the coefficient of chloride migration into the cementitious paste on the one hand and, on the other hand, gave results similar to those of sulfate resistant cements with a low C3A content. Then, tests of accelerated corrosion confirmed the beneficial effect of metakaolin in a marine context. Finally, a predictive model was used to estimate the lifespan of the mixtures exposed to chloride ions. The model showed that the substitution of metakaolin for cement could significantly increase the lifespan of the structures." @default.
- W3091994995 created "2020-10-15" @default.
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- W3091994995 date "2021-01-01" @default.
- W3091994995 modified "2023-10-14" @default.
- W3091994995 title "Performance-based evaluation of flash-metakaolin as cement replacement in marine structures – Case of chloride migration and corrosion" @default.
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- W3091994995 doi "https://doi.org/10.1016/j.conbuildmat.2020.120926" @default.
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