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US 12,264,100 B2Granted
Use of a clay for producing a pozzolanic material
AssigneeVicat
InventorsOlivier Martinage, François Hue
Life of this patent
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Abstract
The use of a clay including: less than 25% of kaolinite; and at least 20% of muscovite and/or illite; the muscovite and/or illite/kaolinite weight ratio being greater than 1, for the preparation of a pozzolanic material.
Claims14
A method for preparing a pozzolanic material, consisting essentially of
- optionally drying a pre-calcined clay, wherein the pre-calcined clay comprises:
- less than 25% by weight of kaolinite,
- at least 20% by weight of at least one of muscovite and illite,
- wherein the at least one of muscovite and illite has the highest content of all minerals in the pre-calcined clay, and
- wherein a weight ratio of the at least one of muscovite and illite to the kaolinite is greater than 1,
- following any optional drying, optionally grinding the pre-calcined clay until the pre-calcined clay has a median diameter less than or equal to 25 μm,
- calcining the pre-calcined clay to obtain a calcined clay, and
- optionally disagglomerating the calcined clay until a median diameter of 10 μm to 20 μm is reached.
5 more elements
A method for preparing a pozzolanic material, comprising
- calcination of a material consisting of clay, wherein the clay is a natural material consisting essentially of silicates and phylosilicates and wherein the clay prior to calcination (pre-calcined clay) includes:
- less than 25% by weight of kaolinite,
- at least 20% by weight of at least one of muscovite and illite,
- wherein the at least one of muscovite and illite has the highest content of all minerals in the pre-calcined clay, and
- wherein a weight ratio of the at least one of muscovite and illite to the kaolinite is greater than 1.
2 more elements
Dependencies are inferred from the claim text.