Pozzolan cement compositions and admixtures therefor
AssigneeUniversal Cement & Concrete Products, Inc.
InventorJonathan E. Dongell
Life of this patent
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Abstract
Blended cement compositions for mixture with aggregate and water to prepare cementitious products. Such blended cement compositions contain cement, calcined diatomaceous earth, calcined kaolin, and about 0.5% to about 4% (w/w) of potassium, with or without talc and/or bentonite or their functional equivalents. Admixtures for blending into cement to create such blended cements or their read-mix equivalents contain calcined kaolin, calcined diatomaceous earth, and potassium, with or without talc and/or bentonite or their functional equivalents.
Claims30
An admixture for subsequent addition to cement to create a blended cement, said blended cement having from about 15% to about 40% (w/w) of said admixture blended therein, said admixture comprising:
- from about 12.5% to about 67% (w/w) of calcined diatomaceous earth;
- from about 17.5% to about 67% (w/w) of calcined kaolin;
- from about 0% to about 22.5% (w/w) of talc;
- from about 0% to about 20% (w/w) of bentonite;
- and sufficient potassium to provide the blended cement with about 0.5% to about 4% (w/w) potassium.
A composition of matter comprising water and a quantity of dry materials including from about 60% to about 85% (w/w) of cement;
- from about 5% to about 27% (w/w) of calcined diatomaceous earth;
- from about 7% to about 27% (w/w) of calcined kaolin;
- from about 0% to about 9% (w/w) of talc;
- from about 0% to about 8% of bentonite;
- and from about 0.5% to about 4% (w/w) of potassium, said weight percentages (w/w) being taken relative to the total weight of said quantity of dry materials.
A pozzolanic cement comprising from about 60% to about 85% (w/w) of cement thoroughly blended with an admixture having from about 12.5% to about 67% (w/w) of calcined diatomaceous earth;
- from about 17.5% to about 67% (w/w) of calcined kaolin;
- from about 0% to about 22.5% (w/w) of talc;
- from about 0% to about 20% (w/w) of bentonite;
- and sufficient potassium to provide the resulting pozzolanic cement with about 0.5% to about 4% (w/w) potassium.
Dependencies are inferred from the claim text.