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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.
Asbestos can be found naturally in the air outdoors and in some drinkable water, including water from natural sources. [20] Even nonoccupationally exposed members of the human population have tens to hundreds of thousands of asbestos fibers per gram of dry lung tissue, equivalent to millions of fibers in each lung. [21]
Chrysotile is resistant to even strong bases (asbestos is thus stable in high pH pore water of Portland cement), but when the fibres are attacked by acids, the magnesium ions are selectively dissolved, leaving a silica skeleton. It is thermally stable up to around 550 °C (1,022 °F), at which temperature it starts to dehydrate.
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 ...
He mixed 90% cement and 10% asbestos fibres with water and ran it through a cardboard machine, forming strong thin sheets. Originally, the reinforcing fibres were of asbestos and the material was commonly used as siding in house buildings due to its low cost, fire-resistance, water tightness, light weight, and other useful properties.
Principally he mixed 90% Portland cement and 10% asbestos fibres with water and ran it through a cardboard machine. Originally, the fibres were of asbestos and the material was commonly used as siding in house buildings due to its low cost, fire-resistance , water tightness, lightweight, and other useful properties.
In construction, asbestos abatement is a set of procedures designed to control the release of asbestos fibers from asbestos-containing materials. [1] Asbestos abatement is utilized during general construction in areas containing asbestos materials, particularly when those materials are being removed, encapsulated, or repaired.
Transite originated as a brand that Johns Manville, an American company, created in 1929 for a line of asbestos-cement products, including boards and pipes. [1] 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 ...