Light-weight cementitious product
AssigneeResearch One Limited Partnership
InventorsJanine M. Rizer, Carl Gotzmer
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Abstract
A glass-fiber reinforced light-weight cementitious product having a density of less than 85 pounds per cubic foot, a high tensile strength and a high compressive strength, when cured, and hence, suitable for structural articles in which such properties are required. The product is formulated from a mixture in which the aggregate comprises substantially equal parts by weight of fly ash cenospheres and silica fume.
Claims6
A light-weight cementitious product exhibiting a density of less than 85 pounds per cubic foot, a tensile strength, after curing, of at least about 600 psi, and a compressive strength of at least 10 times the tensile strength, comprising a cement matrix, and aggregate consisting of substantially equal parts of fly ash cenospheres and silica fume and reinforced with chopped glass fibers, said chopped glass fibers not exceeding 1/2" in length.
Compositions which when cured produce cement products with a density of less than 85 pounds per cubic foot, a tensile strength of at least about 600 psi, and a compressive strength of at least ten times the tensile strength and which comprises the following ingredients in percent by weight:
- ______________________________________ Range Preferred ______________________________________ Portland Cement 30-37 33.67 Aggregate Cenospheres 19-22 20.90 Silica Fume 19-22 20.74 Admixture Mighty 100P up to 3 1.4 Tri-n-butyl Phosphate up to 0.074 0.037 Glass Fibers 4-12 4.54 Water 10-18.7 18.64 Water/Portland Cement 0.55 Water/aggregate .13 water/Cement & Silica Fume .20-.34 ______________________________________
Dependencies are inferred from the claim text.