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In the making of firebrick, fire clay is fired in the kiln until it is partly vitrified.For special purposes, the brick may also be glazed. There are two standard sizes of fire brick: 9 in × 4 + 1 ⁄ 2 in × 3 in (229 mm × 114 mm × 76 mm) and 9 in × 4 + 1 ⁄ 2 in × 2 + 1 ⁄ 2 in (229 mm × 114 mm × 64 mm). [2]
Vermiculite is a 2:1 clay, meaning it has two tetrahedral sheets for every one octahedral sheet. It is a limited-expansion clay with a medium shrink–swell capacity. Vermiculite has a high cation-exchange capacity (CEC) at 100–150 meq/100 g.
This is a list of the heritage sites in Cape Town's CBD, the Waterfront, and the Bo-Kaap as recognized by the South African Heritage Resources Agency. [1] [2]For additional provincial heritage sites declared by Heritage Western Cape, the provincial heritage resources authority of the Western Cape Province of South Africa, please see the entries at the end of the list.
This list of mines in South Africa is subsidiary to the list of mines article and lists working, defunct and future mines in the country and is organised by the primary mineral output. For practical purposes stone, marble and other quarries may be included in this list.
Type of site: House. This is part of the oldest so-called garden city in South Africa. 9/2/031/0001/004 12 Meadway Pinelands, Cape Town Type of site: House. This is part of the oldest so-called garden city in South Africa. Cape Town, Pinelands: Goodwood Provincial Heritage Site
Nearly 1,000 homes in informal settlements in Cape Town, South Africa, have been destroyed by gale-force winds, displacing around 4,000 people, authorities and an aid organization said as the city ...
Fire clay in a furnace. Fire clay is a range of refractory clays used in the manufacture of ceramics, especially fire brick. The United States Environmental Protection Agency defines fire clay very generally as a "mineral aggregate composed of hydrous silicates of aluminium (Al 2 O 3 ·2SiO 2 ·2H 2 O) with or without free silica." [1]
Mudbrick or mud-brick, also known as unfired brick, is an air-dried brick, made of a mixture of mud (containing loam, clay, sand and water) mixed with a binding material such as rice husks or straw. Mudbricks are known from 9000 BCE. From around 5000–4000 BCE, mudbricks evolved into fired bricks to increase strength