Method for separating different constituents of a concrete for deconstruction
AssigneeFives Fcb
InventorsAlain Cordonnier, François Boudot, Alain Fruchart, Yannick Guimard, Jérôme Portal
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Abstract
A method of separating different constituents of a fine fraction that is produced in a prior method for separating a concrete for deconstruction. The method allows the reuse of these different constituents in the production of a new cement and/or of a new concrete, the fine fraction including sand and at least 30% by mass of hydrated cement paste.
Claims8
A method for separating different constituents of a fine fraction resulting from a previous method for separating a concrete for deconstruction allowing the reuse of these different constituents in the production of a new cement and/or of a new concrete, the fine fraction comprising sand and at least 30% by mass of hydrated cement paste, the fine fraction being hereinafter referred to as the feed material, the method implementing a facility including:
- an attrition system, and
- a separation system, and wherein the method comprises the steps of:
- feeding the attrition system with the feed material to grind the feed material,
- attriting the feed material to form ground feed material, and
- seperating the ground feed material in the attrition system is carried out by means of a cut-off mesh of the separation system comprised between 50 and 300 micrometres so as to obtain a sandy fraction comprising an amount of hydrated cement paste less than or equal to 25% and greater than or equal to 5% by mass, and a fraction of hydrated cement paste comprising an amount of hydrated cement paste greater than or equal to 40% and less than or equal to 95% by mass.
Dependencies are inferred from the claim text.