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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 facer and backer paper, used in the construction ...
The development of plasterboard (a sandwich of gypsum plaster between two sheets of paper) dates back to the late nineteenth century in the US. The first patent was granted in 1894 but it was not until an American, Frank Culver, persuaded his new employer, Thomas McGhie and Sons, to buy a plasterboard plant from the US that this new product was introduced to Britain.
Plaster is widely used as a support for broken bones; a bandage impregnated with plaster is moistened and then wrapped around the damaged limb, setting into a close-fitting yet easily removed tube, known as an orthopedic cast. Plaster is also used in preparation for radiotherapy when fabricating individualized immobilization shells for patients ...
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.
Roughcast or pebbledash is a coarse plaster surface used on outside walls that consists of lime and sometimes cement mixed with sand, small gravel and often pebbles or shells. [1] The materials are mixed into a slurry and are then thrown at the working surface with a trowel or scoop.
The consumer price index (CPI) is the official measure of inflation in South Africa. One variant, the consumer price index excluding mortgage costs (CPIX), is officially targeted by the South African Reserve Bank [ 1 ] and a primary measure that determines national interest rates.
This is a list of newspapers in South Africa. In 2017, there were 22 daily and 25 weekly major urban newspapers in South Africa, mostly published in English or Afrikaans. [ 1 ] According to a survey of the South African Audience Research Foundation , about 50% of the South African adult population are newspaper readers and 48% are magazine ...
In Southern Africa in the 1970s, the political situation was deteriorating in both Rhodesia and South Africa, leading to civil security problems, especially in isolated areas and farming communities. In this scenario, Uzi-like hand machine carbines chambered in 9mm Parabellum became popular as home defence weapons in isolated areas ...