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发表于 2014-6-1 06:06:47
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Asbestos is a naturally occurring fibrous material and has been used for about 150 years on a large scale. It is versatile, plentiful and ideal as a fire-proofing and insulation material. But it can be deadly!
The three main types of asbestos that have been used commercially are:
?Crocidolite (blue)
?Amosite (brown)
?Chrysotile (white)
These groups of asbestos fibres differ in their mechanical and chemical properties. The different types of asbestos can be found on their own or as a mixture with any of the other fibres. All asbestos fibres are classed as dangerous, but blue and brown asbestos are thought to be more dangerous than white asbestos.
Presence of Asbestos
Asbestos was used in a plethera of different products and buildings from the 1950’s to the mid 1980’s with Asbestos cement was used up until 1999 in a variety of different materials. Therefore any building that was constructed or had major refurbishment between the 1950’s and mid 80’s is likely to contain some type of asbestos containing material.
Asbestos Products
Asbestos products can be classed as 'licensable' and 'non-licensable' materials depending on the application. The table below indicates the designation of each material:
Licensable Products Non - licensable Products
?Asbestos Insulation
?Asbestos Cement Products
?Sprayed Asbestos
?Asbestos Gaskets
?Asbestos Insulating Board (AIB)
?Floor Tiles and Adhesive
?Textured Coating
?Bitumen
?Asbestos Rope (as Insulation)
?Mastic containing Asbestos
When Licensable products are identified by way of asbestos survey, 14 day notification to the Health and Safety Executive will be submitted prior to any works being undertaken.
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