Expanded lightweight aggregate made from glass or pumice
First Claim
Patent Images
1. An expanded lightweight aggregate formed from a mixture comprising:
- a first ground 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 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.
1 Assignment
0 Petitions
Accused Products
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.
285 Citations
24 Claims
-
1. An expanded lightweight aggregate formed from a mixture comprising:
-
a first ground 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 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 (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. 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 wherein the expanded lightweight aggregate has a bulk density in the range of about 0.10 to 0.5 g/cm3, an effective density in the range of about 0.10 to 0.8 g/cm3, a compressive strength in the range of about 0.5 MPa to 5 MPa, and a heat conductance in the range of about 0.04 to 0.15 W/mK. - View Dependent Claims (11, 12, 13, 14, 15)
-
-
16. A method for manufacturing an expanded lightweight aggregate comprising the steps of:
-
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 50% by weight percent to produce a slurry; adding a sodium silicate in the range of about 6 to 7% by weight percent to the slurry; adding a NaNO3 in the range of about 0.9 to 1.1% 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 (17, 18, 19, 20, 21, 22, 23, 24)
-
Specification