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Asbestos Facts:
Asbestos is a naturally occurring fibrous silicate mineral which was commercially
exploited for its useful properties which include insulation (thermal and
acoustic) fire resistance and as a binder in cement. There are over 3000
products containing asbestos that are around us today.
The three main types of asbestos:
- Crocidolite-(NaFeSiO) also known as riebeckite and blue asbestos.
- Amosite-(FeMgSiO) also known as grunerite and brown asbestos.
- Chrysotile-(MgSiO) also known as lizardite and white asbestos.
The colours do not always determine the type as dyes were often added.
Diseases
Asbestos related diseases cause an estimated 3000 deaths per year and this
figure is rising this fact alone surely justifies the new legislation (not
to say the government needs justification).
As the latency period(the time between first exposure and death) is between
15 and 60 years many of the people who are dying from asbestos related diseases
now where exposed in the 1960s and 1970s. This terrible trend must be stopped
now. Asbestosis, pleural plaques, lung cancer and mesothelioma are all caused
by exposure to asbestos fibres.
A Brief History of Asbestos
The word asbestos originates from around 4000BC (from the greek meaning
unquenchable). During this period it was used for wicks in candles & lamps.
Around 2500BC asbestos was used to wrap around egyptian pharoes to offset
the decomposing process. About the same time evidence shows it was used
in Finland to give clay pots added strength.
By 1000AD asbestos was being widely used for cremation cloths, mats & temple
lamp wicks by the mediterranean's
During the early 1700s the first asbestos paper & boards were made.(Italy)
In the mid 19th century asbestos helmets & jackets were being worn by firefighters
in France & insulation, packing's& gaskets were being made from asbestos.
It was during the 1870s the asbestos industry really took off with the founding
of large asbestos companies in England, Scotland & Germany. Also in Russia
& Canada where large deposits of chrysotile (white asbestos) were exploited.
As long ago as 1897 the first bronchial problems were identified.
During the first quarter of the 20th century the first asbestos pipes &
corrugated sheeting arrived on the scene.
In 1931 the Asbestos regulations were passed in the U. K.
Asbestos was beginning to crop up everywhere. In the 1939 film "The wizard
of oz" the wicked witch of the west's broom was made out of asbestos.
Fireproof suits & parachute flares in WW11 were asbestos based.
The post war rebuilding & construction projects placed heavy reliance
on asbestos & its usage reached an all time high in 1973. From the mid 1970s
its use in new products declined rapidly. Since 1992 it has been illegal
to use asbestos to make new products in the U. K. In 1999 the selling &
fixing of asbestos containing materials (ACMs) in the UK was banned.
A conservative estimate puts the amount of Asbestos
still in British buildings at over 1 million tonnes
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