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Recyclage du ciment dans le ciment : incorporation des déchets de construction et de démolition dans le cru cimentier

Abstract : The European "SeRaMCo" project aims to manufacture precast concrete elements containing recycled aggregates and "recycled" cement. This cement is obtained by incorporating construction and demolition waste into its raw material, in particular the fine fraction which is the richest in hardened cement paste. This PhD thesis provided a better understanding of the impact of the chemical and mineralogical variability of recycled aggregates on the incorporation rate and on the proportion of other raw materials. Laboratory syntheses and associated characterizations allowed to follow the evolution of the mineralogy during the rise in temperature and for several types and rates of recycled aggregates. Tests, including transmission electron microscopy, have also shown that for a high rate of incorporation, the presence of quartz, feldspar and ceramic can affect the burnability of the cement raw meal and the reaction mechanisms. In partnership with the cement manufacturer VICAT, the work has shown that it is possible to produce an industrial "recycled" cement with usual properties by adjusting the manufacturing process as needed or by reducing the rate of incorporation. Even a limited incorporation rate allows to recover easily the waste available on a regional scale from a cement plant while preserving its natural resources. This work also offers new perspectives for the recovery of other materials in cement works and the study of their reactivity.
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Submitted on : Wednesday, May 19, 2021 - 3:33:49 PM
Last modification on : Saturday, October 16, 2021 - 11:20:13 AM
Long-term archiving on: : Friday, August 20, 2021 - 6:41:46 PM


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  • HAL Id : tel-03230160, version 1


Hichem Krour. Recyclage du ciment dans le ciment : incorporation des déchets de construction et de démolition dans le cru cimentier. Matériaux. Université de Lorraine, 2021. Français. ⟨NNT : 2021LORR0008⟩. ⟨tel-03230160⟩



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