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Asbestos cement competed with aluminum alloy, available in large quantities after WWII, and the reemergence of wood clapboard and vinyl siding in the mid to late 20th century. Asbestos cement is usually formed into flat or corrugated sheets or into pipes, but can be molded into any shape that can be formed using wet cement.
Concrete roofing is composed of concrete reinforced with fibers of some sort. Structural concrete can also be used for flat roof constructions. There are three main categories, precast/prestressed, cast-in-place and shell. There are many types of precast/prestressed concrete roofing. The following are the most common types. [8]
Asbestos (/ æ s ˈ b ɛ s t ə s, æ z-,-t ɒ s / ass-BES-təs, az-, -toss) [1] is a group of naturally occurring, toxic, carcinogenic and fibrous silicate minerals.There are six types, all of which are composed of long and thin fibrous crystals, each fibre (particulate with length substantially greater than width) [2] being composed of many microscopic "fibrils" that can be released into ...
Front cover of a brochure for Hatscheks Eternit Schiefer (asbestos cement roof tiles) Fibre-reinforced cement products were invented in the late 19th century by the Austrian Ludwig Hatschek . Principally he mixed 90% Portland cement and 10% asbestos fibres with water and ran it through a cardboard machine.
In time it became a generic term for other companies' similar asbestos-cement products, and later an even more generic term for a hard, fireproof composite material, fibre cement boards, typically used in wall construction. It can also be found in insulation, siding, roof gutters, and cement wallboard. The more prevalent transite found in wall ...
The concrete was used from the 1950s until the mid-1990s, with the Institute of Structural Engineers saying it will only need to be replaced if it is considered to be of poor condition and at high ...
Turnall Fibre Cement Ltd still operates in Zimbabwe but as an independent company, mainly producing asbestos cement sheets and pipes. According to the company, "there is not an industrial, agricultural or residential area of Zimbabwe that does not have one or more of the company's many [asbestos cement] products in use or on display". [9]
Everest Industries Limited was founded in 1934 under the name of Asbestos Cement Ltd. [7] in Maharashtra. In 1983, the company changed its name to Everest Building Product Ltd., in the same year the company went public on the Bombay Stock Exchange. [8] In 1990 the company was renamed Eternit Everest Ltd. It got its current name in 2003.