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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.
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.
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 ...
The Times of South Africa was a daily printed newspaper that was delivered free to 137,054 (according to the Audit Bureau of Circulations statistics) Sunday Times subscribers five days a week. Tabloid in size, it was South Africa's first totally interactive newspaper, published in tandem with the TimesLIVE website. [ 1 ]
The distribution of white South Africans is fairly evenly spread. According to the 2022 South African census, they comprise 7.3% of the total population and number 4,504,252. They are found in large numbers in practically every province in South Africa but always as a minority. They are high in concentration in large cities.
South Africa signed up to use ISO 8601 for date and time representation through national standard ARP 010:1989 in 1998 A.D. The most recent South African Bureau of Standards standard SANS 8601:2009 [1] "... is the identical implementation of ISO 8601:2004, and is adopted with the permission of the International Organization for Standardization" and was reviewed in 2016.
South Africa's energy crisis (or load shedding) is an ongoing period of widespread national blackouts of electricity supply. It began in the later months of 2007 towards the end of Thabo Mbeki 's second term as president, and continues to the present.