Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing
Reexamination Certificate
2009-02-24
2011-11-29
Green, Anthony (Department: 1731)
Compositions: coating or plastic
Coating or plastic compositions
Inorganic settable ingredient containing
C106S705000, C106S706000, C106S712000, C106S782000, C106S788000, C106S790000, C106S791000, C106S792000, C106S793000, C106S817000
Reexamination Certificate
active
08066813
ABSTRACT:
A method of making a cementitious composition comprises (a) selecting at least one pozzolanic particulate material; (b) selecting and grinding at least one feldspar material to a fineness of at least 3000 Blaine; (c) mixing calcium oxide or calcium hydroxide with gypsum; (d) mixing the ground feldspar with the lime-gypsum mixture to produce an activator; (e) conditioning the pozzolanic particulate material with an aqueous solution; (f) adding the activator to the conditioned material to produce a slurry; and (g) curing the slurry in a sealed container. The pozzolanic particulate material can be slag, fly ash, or siliceous rock. A cementitious composition of the invention comprises a pozzolanic particulate material, a ground feldspar material, a lime compound and gypsum, and uses readily available materials, as an economic replacement for Portland cement, fly ash or other materials in filling, backfilling and paving, particularly for backfilling or stabilizing mine sites.
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Atkinson et al., “Using Smelter Slag in Mine Backfill,” Mining Magazine, 1989, vol. 160, No. 8, pp. 118-123.
Green Anthony
Her Majesty the Queen in right of Canada as represented by the
Price Heneveld LLP
LandOfFree
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