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US 6,176,920 B1Granted
Cementitious structural panel and method of its manufacture
AssigneeSmartboard Building Products Inc.
InventorsPatrick B. Murphy, George Wypych
Life of this patent
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Abstract
The present invention relates to a cementitious structural panel and its method of manufacture. The method of manufacture involves encapsulating a top and bottom layer of porous reinforcing material with a cementitious mixture by vibration. The structural panel may be coated with a layer of waterproof material.
Claims15
A method of forming a panel comprising:
- (a) placing a first porous sheet of reinforcing material in a panel mould;
- (b) providing a cemenetitious mixture and dispensing said cementitious mixture into said mould to cover said first sheet, thereby forming a cementitious layer;
- (c) vibrating said cementitious mixture to fully encapsulate said first sheet in said cementitious layer, said cementitious mixture having a wet density which facilitates full encapsulation of said first sheet when said cementitious mixture is vibrated.
- (d) placing a second porous sheet of reinforcing material atop said cementitious layer;
- (e) vibrating said cemenetitious mixture to fully encapsulate said second sheet in said cementitious layer;
- (f) curing said cmentitious layer so that said cementitious layer, said first sheet and said second sheet form a panel;
- and
- (g) removing said panel from said mould.
5 more elements
Dependencies are inferred from the claim text.