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US 2017/0233291 A1Published application
Method for making fly ash
AssigneeImerys Ceramics France
InventorsAlexandre SEVAGEN, Murielle PERRONNET, Christian RAVAGNANI
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Abstract
A method of making fly ash comprising combusting a fuel in the presence of a mineral additive, wherein the mineral additive comprises at least one silicate, fly ash obtained by said method and the use of said fly ash as a pozzolan, for example for use in a cementitious composition such as cement and concrete.
Claims22
A method of making fly ash, the method comprising:
- combusting fuel in the presence of a mineral additive to produce a fly ash;
- wherein the mineral additive comprises at least one silicate;
- and
- wherein the fly ash
- A. has a pozzolanic activity that is at least about 5% greater than the pozzolanic activity of a fly ash made by the same method in the absence of the mineral additive;
- or
- B. has a loss-on-ignition (LOI) that is at least about 5% less than the LOI of a fly ash made by the same method in the absence of the mineral additive.
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Dependencies are inferred from the claim text.