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The term tadelakt, meaning "to rub in", is an Amazighified expression from the Arabic word تدليك tadlīk, meaning "to rub or massage." [3] [4] Tadelakt is thought to have evolved from qadad, a similar plaster used in Yemen for millennia that is treated with calcium hydroxide and oils and fats instead of soaps. [2]
Qadad (Arabic: قضاض qaḍāḍ) or qudad is a waterproof plaster surface, made of a lime plaster treated with slaked lime and oils and fats. The technique is over a thousand years old, [ 1 ] [ 2 ] with the remains of this early plaster still seen on the standing sluices of the ancient Marib Dam .
The two base coats of plaster are either hand-applied or machine sprayed. The finish coat can be troweled smooth, hand-textured, floated to a sand finish or sprayed. Originally, the lath material was strips of wood installed horizontally on the wall, with spaces between, that would support the wet plaster until it cured.
USG has a large gypsum plant located 17 miles (27 km) west of El Centro, California, along highway Interstate 8, at Plaster City. [25] The Plaster City location makes Sheetrock brand gypsum panels. The gypsum is mined from a quarry located 20 miles (32 km) to the north, in the Fish Creek Mountains of Imperial County. The quarry is estimated to ...
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 ...
Articles relating to plasterwork, construction or ornamentation done with plaster, such as a layer of plaster on an interior or exterior wall structure, or plaster decorative moldings on ceilings or walls.
Plaster City, California is a company town with a large gypsum quarry and plant owned by United States Gypsum (USG) [1] in Imperial County, California.It is located 17 miles (27 km) west of El Centro, [1] at an elevation of 105 feet (32 m), a two-hour drive south of Palm Springs, or a 90 minute drive east from San Diego.
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.