LIGHTWEIGHT CEMENTITIOUS COMPOSITIONS AND BUILDING PRODUCTS AND METHODS FOR MAKING SAME
First Claim
Patent Images
1. A method of providing a lightweight cementitious slurry comprising:
- forming a mixture of;
35 to 60 wt. %, on a wet basis, cementitious reactive powder comprising Portland cement,2 to 10 wt. %, on a wet basis, expanded and chemically coated water tight and water repellant perlite filler,20 to 40 wt. % water,0 to 25 wt. %, on a wet basis, secondary filler;
10 to 50 vol. %, on a wet basis, entrained air; and
optional additive selected from at least one member of the group consisting of water reducing agents, chemical set-accelerators, chemical set-retarders, air-entraining agents, and foaming agents;
under conditions which provide an initial slurry temperature of at least about 40°
F. (4.4°
C.).
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Accused Products
Abstract
Cementitious compositions and methods for making same, in which the cementitious compositions include 35-60 wt. % cementitious reactive powder (also termed Portland cement-based binder), 2-10 wt. % expanded and chemically coated perlite filler, 20-40 wt. % water, entrained air, and optional additives such as water reducing agents, chemical set-accelerators, and chemical set-retarders. In addition, the lightweight cementitious compositions may contain 0-25 wt. % on a wet basis secondary fillers such as expanded clay, shale aggregate, and pumice.
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Citations
53 Claims
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1. A method of providing a lightweight cementitious slurry comprising:
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forming a mixture of; 35 to 60 wt. %, on a wet basis, cementitious reactive powder comprising Portland cement, 2 to 10 wt. %, on a wet basis, expanded and chemically coated water tight and water repellant perlite filler, 20 to 40 wt. % water, 0 to 25 wt. %, on a wet basis, secondary filler; 10 to 50 vol. %, on a wet basis, entrained air; and optional additive selected from at least one member of the group consisting of water reducing agents, chemical set-accelerators, chemical set-retarders, air-entraining agents, and foaming agents; under conditions which provide an initial slurry temperature of at least about 40°
F. (4.4°
C.). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A composition for preparing a cement board comprising a slurry comprising a mixture of the following components:
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to 60 wt. % cementitious reactive powder comprising Portland cement, 2 to 10 wt. %, on a wet basis, expanded and chemically coated water tight and water repellant perlite filler, 20 to 40 wt. % water, 0 to 25 wt. %, on a wet basis, secondary filler; 10 to 50 volume %, on a wet basis, entrained air, and optional additive selected from at least one member of the group consisting of water reducing agents, chemical set-accelerators, and chemical set-retarders; the slurry being at a temperature of at least about 40°
F. (4.4°
C.) when the components are mixed to form the composition. - View Dependent Claims (35, 36, 37)
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38. A cement board having a density of about 45 to 85 pounds per cubic foot (0.72 to 1.36 g/cc) and having a continuous phase resulting from the curing of an aqueous mixture comprising:
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35-60 parts by weight Portland cement-based binder, 2-10 parts by weight expanded and chemically coated perlite filler, 10-50 volume % entrained air, and optional additives selected from one or more members of the group consisting of water reducing agents, chemical set-accelerators, chemical set-retarders; and 0-25 parts by weight from one or more members of the group consisting of expanded clay, shale aggregate, and pumice as secondary fillers. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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Specification