Expanded lightweight aggregate made from glass or pumice
First Claim
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1. An expanded lightweight aggregate formed from a mixture comprising:
- a first ground glass or pumice in the range of about 40 to 60% by weight percent for a slurry;
a water in the range of about 40 to 60% by weight percent for the slurry;
a sodium silicate in the range of about 3 to 15% by weight percent for the slurry;
a NaNO3 in the range of about 0.1 to 5% for the slurry;
a second ground glass or pumice in the range of about 50 to 85% by weight percent for a granulator;
the slurry in the range of about 15 to 50% by weight percent for the granulator; and
the expanded lightweight aggregate having a particle size comprising about 0-1 mm, 1-2 mm, 2-4 mm, 4-8 mm or a combination thereof.
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Abstract
An expanded lightweight aggregate has compositional ranges (Wt. % Range) of about: (a) 40 to 60% ground glass or pumice, 40 to 60% water, 3 to 15% sodium silicate, and 0.1 to 5% NaNO3 for the slurry; and (b) 50 to 85% ground glass or pumice, and 15 to 50% slurry for the granulator.
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Citations
25 Claims
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1. An expanded lightweight aggregate formed from a mixture comprising:
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a first ground glass or pumice in the range of about 40 to 60% by weight percent for a slurry; a water in the range of about 40 to 60% by weight percent for the slurry; a sodium silicate in the range of about 3 to 15% by weight percent for the slurry; a NaNO3 in the range of about 0.1 to 5% for the slurry; a second ground glass or pumice in the range of about 50 to 85% by weight percent for a granulator; the slurry in the range of about 15 to 50% by weight percent for the granulator; and the expanded lightweight aggregate having a particle size comprising about 0-1 mm, 1-2 mm, 2-4 mm, 4-8 mm or a combination thereof. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An expanded lightweight aggregate formed from a mixture consisting essentially of:
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a first ground glass or pumice in the range of about 40 to 60% by weight percent for a slurry; a water in the range of about 40 to 60% by weight percent for the slurry; a sodium silicate in the range of about 3 to 15% by weight percent for the slurry; a NaNO3 in the range of about 0.1 to 5% for the slurry; a second ground glass or pumice in the range of about 50 to 85% by weight percent for a granulator; and the slurry in the range of about 15 to 50% by weight percent for the granulator. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method for manufacturing an expanded lightweight aggregate comprising the steps of:
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mixing a first ground glass or pumice in the range of about 40 to 60% by weight percent with water in the range of about 40 to 60% by weight percent to produce a slurry; adding a sodium silicate in the range of about 3 to 15% by weight percent to the slurry; adding a NaNO3 in the range of about 0.1 to 5% to the slurry; forming aggregates in a granulator by feeding a second ground glass or pumice in the range of about 50 to 85% by weight percent with the slurry in the range of about 15 to 50% by weight percent; drying the formed aggregates; heating the dried aggregates together with a finely ground kaolin to a temperature of about 800 to 1400 degrees Celsius; and cooling the heated aggregates. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification