Asbestos
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Asbestos- Assignment 1
Asbestos has been used for over 2000 years and during the 20th century more than 3000 products contained asbestos. The chemical properties of asbestos are extremely desirable, especially in the construction industry. Asbestos is resistant to heat and most chemicals, non flammable and extremely workable. Mining of asbestos began in 1880 in Australia and nearly one third of every domestic dwelling build between 1945 and 1987 is thought to contain asbestos. Australia had the highest per capita use of asbestos in the world from the 1950s until the 1980s until manufacturing was eventually banned in 1983, although it was still in use until 2002. Despite the bans, Australia’s residents are still exposed to asbestos in many buildings that contain asbestos cement and other asbestos products, especially when they are demolished . Products which contain asbestos can generate fibres when they are damaged, weathered, old or demolished which can cause air borne fibres to be released into the atmosphere where they can be harmful to humans.
Asbestos is a set of six naturally occurring silicate minerals that have been exploited commercially for their desirable physical and chemical properties. In nature they generally occur in metamorphic or igneous rocks, and it has been estimated that asbestos can be found in two thirds of the rocks in the earth 's crust. Naturally, there are some forms which haven 't been altered by extreme pressure and heat and present no effects on human health.
Asbestos is resistant to heat and most chemicals, the fibres do not evaporate in air and they are insoluble in water. It is non-flammable and has a tensile strength which is stronger than steel. It has tremendous thermal and electrical resistance, and once combined with other insulating materials, creates an ideal material for construction use. There are three main types of asbestos used commercially, Chrysotile, Crocidolite and Amosite. Chrysotile, commonly known as
Asbestos- Assignment 1
Asbestos has been used for over 2000 years and during the 20th century more than 3000 products contained asbestos. The chemical properties of asbestos are extremely desirable, especially in the construction industry. Asbestos is resistant to heat and most chemicals, non flammable and extremely workable. Mining of asbestos began in 1880 in Australia and nearly one third of every domestic dwelling build between 1945 and 1987 is thought to contain asbestos. Australia had the highest per capita use of asbestos in the world from the 1950s until the 1980s until manufacturing was eventually banned in 1983, although it was still in use until 2002. Despite the bans, Australia’s residents are still exposed to asbestos in many buildings that contain asbestos cement and other asbestos products, especially when they are demolished . Products which contain asbestos can generate fibres when they are damaged, weathered, old or demolished which can cause air borne fibres to be released into the atmosphere where they can be harmful to humans.
Asbestos is a set of six naturally occurring silicate minerals that have been exploited commercially for their desirable physical and chemical properties. In nature they generally occur in metamorphic or igneous rocks, and it has been estimated that asbestos can be found in two thirds of the rocks in the earth 's crust. Naturally, there are some forms which haven 't been altered by extreme pressure and heat and present no effects on human health.
Asbestos is resistant to heat and most chemicals, the fibres do not evaporate in air and they are insoluble in water. It is non-flammable and has a tensile strength which is stronger than steel. It has tremendous thermal and electrical resistance, and once combined with other insulating materials, creates an ideal material for construction use. There are three main types of asbestos used commercially, Chrysotile, Crocidolite and Amosite. Chrysotile, commonly known as
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