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The compressive strength of bricks produced in the United States ranges from about 7 to 103 MPa (1,000 to 15,000 lbf/in 2), varying according to the use to which the brick are to be put. In England clay bricks can have strengths of up to 100 MPa, although a common house brick is likely to show a range of 20–40 MPa.
Modern fired clay bricks are formed from clays or shales, shaped and then fired in a kiln for 8–12 hours at a temperature of 900–1150 °C. [ 43 ] [ f ] The result is a ceramic that is mainly composed of silica and alumina, with other ingredients such as quartz sand.
Bricks are typically made of concrete or clay, though other composite materials are also used. Each has its own means of construction. The biggest difference is the way they set hard ready for use. A clay brick has to be fired in a kiln to bake the brick hard. A concrete brick has to be allowed to set.
Clay wall plaster exhibited very high deposition velocities and negligible yields. Clay and materials containing clay (e.g. bricks) consume ozone readily, perhaps because of a reaction catalyzed by metals present in the clay. Clay plaster with very high ozone uptake rates, has certain surface roughness, and porosity.
An old Puolimatka's brick factory in Kissanmaa, Tampere, Finland, in the 1960s. Most brickworks have some or all of the following: A kiln, for firing, or 'burning' the bricks. Drying yard or shed, for drying bricks before firing. A building or buildings for manufacturing the bricks. A quarry for clay. A pugmill or clay preparation plant (see ...
[1] [2] Common examples are earthenware, porcelain, and brick. The earliest ceramics made by humans were fired clay bricks used for building house walls and other structures. Other pottery objects such as pots, vessels, vases and figurines were made from clay, either by itself or mixed with other materials like silica, hardened by sintering in
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Common red clay and shale clay have vegetable and ferric oxide impurities which make them useful for bricks, but are generally unsatisfactory for pottery except under special conditions of a particular deposit. [18] Bentonite: An extremely plastic clay which can be added in small quantities to short clay to increase the plasticity.