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AssigneeCR Minerals Company, LLC
InventorsJoseph Earl Thomas, Richard Douglas Carter, Jeffrey Alexander Whidden
Estimating the term…
It has been unexpectedly discovered that the addition of a non-spec natural pozzolan to non-spec fly ash significantly improves the properties of the non-spec fly ash to the extent it can be certified under ASTM C618 and AASHTO 295, as either a Class F or Class C fly ash. Other pozzolans may also be used for this beneficiation process. Many pozzolans are experimentally tested and may be used to beneficiate non-spec fly ash into certifiable Class F fly ash. Additionally, this disclosure provides a method of converting a Class C fly ash to a more valuable Class F fly ash, by utilizing natural pozzolans. This discovery will extend diminishing Class F fly ash supplies and turn non-spec fly ash waste streams into valuable, certified fly ash pozzolan which will protect and enhance concrete, mortars and grouts.
A pozzolanic composition for use in concrete, said composition comprising a non-spec fly ash combined with a natural pozzolan, wherein said natural pozzolan is present in a concentration of about 1 wt % to about 99 wt %, wherein said natural pozzolan does not meet technical specifications under ASTM C618 or AASHTO M295, and wherein the combination of said natural pozzolan with said non-spec fly ash results in said pozzolanic composition meeting specifications under ASTM C618 and/or AASHTO M295 as a Class F pozzolan for pozzolanic admixtures in concrete.
A pozzolanic composition for use in concrete, said composition comprising a non-spec fly ash combined with a natural pozzolan, wherein said natural pozzolan is present in a concentration of about 1 wt % to about 99 wt %, wherein said natural pozzolan does not meet technical specifications under ASTM C618 or AASHTO M295, and wherein the combination of said natural pozzolan with said non-spec fly ash results in said pozzolanic composition meeting specifications under ASTM C618 and/or AASHTO M295 as a Class C pozzolan for pozzolanic admixtures in concrete.
A pozzolanic composition for use in concrete, said composition comprising a Class C fly ash combined with a natural pozzolan, wherein said natural pozzolan is present in a concentration of about 1 wt % to about 99 wt %, wherein said natural pozzolan does not meet technical specifications under ASTM C618 or AASHTO M295, and wherein the combination of said natural pozzolan with said Class C fly ash results in said pozzolanic composition meeting specifications under ASTM C618 and/or AASHTO M295 as a Class F pozzolan for pozzolanic admixtures in concrete.
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