Lightweight, non-cementitious building material
AssigneeArmstrong Cork Company
InventorsJeffery L. Barrall, William R. Reed
Life of this patent
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Abstract
An improved lightweight building material capable of being formed in a continuous sheet operation. The material comprises sodium silicate as a binder and an expanded inorganic aggregate. In addition, an efflorescence inhibitor is included in such composition comprising boric acid, a metal borate selected from the group consisting of zinc borate, calcium borate, magnesium borate and mixtures thereof, a calcium salt selected from the group consisting of calcium sulfate, calcium nitrate, calcium phosphate, calcium orthophosphate and mixtures thereof, an alkali metal fluorosilicate, or mixtures of the above.
Claims11
An improved non-cementitious building material comprising sodium silicate and an expanded siliceous inorganic aggregate, the improvement comprising said building material further including an efflorescence inhibitor comprising a boron compound selected from the group consisting of the borates of zinc, calcium, magnesium, and mixtures thereof;
- a calcium salt selected from the group consisting of calcium nitrate, calcium phosphate, calcium orthophosphate, and mixtures thereof.
An improved non-cementitious building material comprising sodium silicate and 39%-80% by weight of an expanded perlite, the improvement comprising said building material further including 10 to 37 weight percent of a boron compound selected from the group consisting of zinc borate, calcium metaborate, magnesium borate, and mixtures thereof, based on weight of said sodium silicate.
A method for forming an improved non-cementitious building material comprising
- 1. admixing sodium silicate with an expanded siliceous inorganic aggregate;
- 2. adding to said admixture a boron compound selected from the group consisting of the borates of zinc, calcium, magnesium, and mixtures thereof;
- a calcium salt selected from the group consisting of calcium nitrate, calcium phosphate, calcium orthophosphate, and mixtures thereof;
- and
- 3. pressing and drying the mixture of step 2;
- whereby the efflorescence of the pressed and dried material of step 3 is inhibited.
Dependencies are inferred from the claim text.