Cementitious material
AssigneeCenin Limited
InventorGary Hunt
Life of this patent
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Abstract
A method of manufacturing a hydratable cementitious material, which includes: a) providing at least one waste material containing calcium, silica, magnesium, aluminium, and/or iron; b) thermally treating each waste material to a first temperature such that surface water vapour present is substantially removed; and c) blending the treated waste material such that the resultant blend has a reactive oxide chemical/physical composition in the following range, by weight of the blend: Calcium Oxide 7.0 to 76% Alumina 0.1 to 30% Iron Oxide 0.4 to 19% Silica Oxide 1 to 36% Magnesia 0.1 to 2%. The resultant blend from step c) may subsequently be mixed with Portland cement.
Claims32
A method of manufacturing a blend suitable for use in a cementitious material, which includes:
- a) providing at least two waste materials, each containing one or more of calcium, silica, magnesium, aluminum, or iron;
- b) thermally treating the at least two waste materials, either separately or as a mixture, to a first temperature of 100° C. or more such that surface water vapor present is substantially removed;
- and
- c) blending the at least two waste materials to provide a resultant blend, including selecting the at least two waste materials and employing amounts of the at least two waste materials such that the resultant blend has a reactive oxide chemical/physical composition in the following range, by weight of the resultant blend:
- Calcium oxide
- 7.0 to 76%
- Alumina
- 0.1 to 30%
- Iron oxide
- 0.4 to 19%
- Silica oxide
- 1 to 36%
- Magnesia
- 0.1 to 32%.
Dependencies are inferred from the claim text.