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US 12,152,385 B2Granted
Cementitious panels with swellable materials and methods of providing a moisture or water barrier in cementitious panels using swellable materials
AssigneeGold Bond Building Products, LLC
InventorsEli Stav, Joseph J. Bailey, Bradley G. Busche, Brian G. Randall
Life of this patent
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Abstract
Provided are cementitious panel that include a swellable material within a core layer, a dense layer, and/or a sheet of facing material that make up a cementitious panel, as well as methods of manufacturing such cementitious panels that include a swellable material and methods of providing a moisture or water barrier in a cementitious panel.
Claims23
A cementitious panel, comprising:
- a core layer comprising a first cementitious material;
- a plurality of sheets of facing material surrounding the core layer, the plurality of sheets of facing material comprising a first sheet of facing material and a second sheet of facing material;
- a first dense layer comprising a second cementitious material defining an interface between the core layer and the first sheet of facing material;
- and
- one or more swellable materials comprising a clay, wherein the clay is a smectite, wherein the first dense layer comprises at least one swellable material of the one or more swellable materials.
2 more elements
A cementitious panel, comprising:
- a core layer comprising a first cementitious material;
- a plurality of sheets of facing material surrounding the core layer, the plurality of sheets of facing material comprising a first sheet of facing material and a second sheet of facing material;
- a first dense layer comprising a second cementitious material defining an interface between the core layer and the first sheet of facing material, the first dense layer formed by applying the second cementitious material to an inner side of the first sheet of facing material, the first dense layer having a higher concentration of gypsum crystals and a lower concentration of void volumes than the core layer, wherein at least a portion of the first dense layer penetrates into the first sheet of facing material;
- and
- one or more swellable materials comprising a clay, the one or more swellable materials have the capability to swell to a volume that is at least two times greater than the non-swollen volume of one or more swellable materials when contacted with water or moisture, wherein the first dense layer comprises at least one swellable material of the one or more swellable materials.
2 more elements
Dependencies are inferred from the claim text.