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Due to asbestos cement's imitation of more expensive materials such as wood siding and shingles, brick, slate, and stone, the product was marketed as an affordable renovation material. 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 ...
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 ...
Both indices use an arbitrary scale in which asbestos-cement board has a value of 0, and red oak wood has 100. [ 1 ] The tunnel test does not measure the ignitability of materials, nor does it properly assess the behavior of thermoplastic materials which may tend to melt and drip from the assembly, or for materials with slow flame spread ...
Smoke-developed index (abbreviated SDI) is a measure of the concentration of smoke a material emits as it burns. [1] Like the Flame Spread Index , it is based on an arbitrary scale in which asbestos-cement board has a value of 0, and red oak wood has 100.
Richard Mattison. Keasbey and Mattison Company was a manufacturing company that produced asbestos-related building products, including insulation and shingles.Founded in 1873 by Henry Griffith Keasbey (1850-1932) and Richard Van Zeelust Mattison (1851-1935), the company moved to Ambler, Pennsylvania, in 1881.
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 ...
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
The result is derivation of a Flame Spread Index (FSI), [2] which is a non-dimensional number which is placed on a relative scale in which asbestos-cement board has a value of 0, and red oak wood has 100.