Of starch based on the weight of the stucco. Gypsum board is the generic name for a family of panel products that consist of a noncombustible core composed primarily of gypsum and a paper surfacing on the face back and long edges.
How Drywall Is Made Material Manufacture Making Used Product Machine Raw Materials
While modern drywall or gypsum board is usually composed of a single inner layer of gypsum sometimes reinforced with other fibres and covered on both sides and at least two edges with paper earlier versions of this product included sackett board shown here a wallboard comprised ofr multiple layers of gypsum and paper generally intended to be covered by a final layer of hand applied plaster.
Composition of gypsum board. 100 00 100 00 total oxide. The design a mixture of hollow concrete block with an average strength value of 50 kg cm2 included in class ii quality category according to sni 03 0349 1989 about concrete block for wall pairs with a fas value of 0 3. In the refractory gypsum board composed of a component containing hemihydrate gypsum gypsum hardener and starch 1 to 5 parts by weight of ceramic fiber 5 to 15 parts by weight of silica 60 to.
General gypsum board panels normally come in 4 x 8 feet panels and ranging in 3 8 to 1 inch thickness. Gypsum board is one of several building materials covered by the umbrella term gypsum panel products. Composition of waste gypsum board is 0 15 20 25 and 30 of the weight cement.
Drywall also known as plasterboard wallboard sheet rock gypsum board buster board custard board or gypsum panel is a panel made of calcium sulfate dihydrate with or without additives typically extruded between thick sheets of facer and backer paper used in the construction of interior walls and ceilings. Hydrogen 2 34 h 20 93 h 2 o. Although all gypsum board are fire resistant in nature it has no special additives that makes it more impervious to fire.
A composition for the manufacture of a gypsum board comprising a blend of dry pregelatinized starch and stucco with 0 4 to 3 wt. Molecular weight 172 17 gm calcium 23 28 ca 32 57 cao. Sulfur 18 62 s 46 50 so 3.
The composition of claim 1 wherein the pregelatinized starch is hydroxyalkylated. Oxygen 55 76 o. General gypsum information.
This is the most common type of gypsum board that is used extensively in locations with no specific requirements.