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A gypsum block is made of gypsum plaster and water. The manufacturing process [1] is automated at production plants where raw gypsum (CaSO 4 ·2H 2 O) is ground and dried, then heated to remove three-quarters of the bound water and thus transformed into calcium sulfate hemihydrate (CaSO 4 ·½H 2 O), also known as gypsum plaster, stucco, calcined gypsum or plaster of Paris.
Various sized cuts of 1 ⁄ 2 in (13 mm) drywall with tools for maintenance and installation . Drywall (also called plasterboard, dry lining, [1] wallboard, sheet rock, gib board, gypsum board, buster board, turtles board, slap board, custard board, gypsum panel and gyprock) is a panel made of calcium sulfate dihydrate (), with or without additives, typically extruded between thick sheets of ...
Exterior insulation and finish system (EIFS) is a general class of non-load bearing building cladding systems that provides exterior walls with an insulated, water-resistant, finished surface in an integrated composite material system. EIFS has been in use since the 1960s in North America and was first used on masonry buildings.
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO 4 ·2H 2 O. [4] It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, drywall and blackboard or sidewalk chalk.
The first expanded polystyrene ICF Wall forms were developed in the late 1960s with the expiration of the original patent and the advent of modern foam plastics by BASF. [citation needed] Canadian contractor Werner Gregori filed the first patent for a foam concrete form in 1966 with a block "measuring 16 inches high by 48 inches long with a tongue-and-groove interlock, metal ties, and a waffle ...
The product was patented in 1971, a patent which expired in 1991. After the expiration of the patent several companies started commercial production such as Reynobond (1991), Alpolic (Mitsubishi Chemicals, 1995), etalbond (1995). Today, it is estimated [by whom?] that more than 200 companies across the world are producing ACP.
In August 2005, BPB received a hostile takeover bid from Saint-Gobain, which set a price of 720 pence per share. The BPB initially resisted this strongly, but eventually accepted a revised bid of 775 pence per share, which valued the company at £3.9billion (US$6.7 billion). [4] BPB was delisted in December 2005.
Ohio History Connection. Archived from the original on 2022-01-17 Features history, images, locations, preservation guidelines and construction drawings; The Illustrious Lustron: A Guide for the Disassembly and Preservation of America's Modern Metal Marvel Available for download. Includes photographs and historical information.