Asbestos Types and Properties Flashcards

Which of the following is NOT one of the three main types of asbestos commonly found in UK buildings?

Answer: Vermiculite (grey)

The three main types of asbestos found in UK buildings are chrysotile (white), amosite (brown), and crocidolite (blue). Vermiculite is a mineral that may contain asbestos but is not itself a type of asbestos.

Chrysotile asbestos belongs to which mineral group?

Answer: Serpentine

Chrysotile (white asbestos) belongs to the serpentine mineral group, characterised by its curly, flexible fibres. The other main types (amosite and crocidolite) belong to the amphibole group.

Which type of asbestos was most commonly used in the UK before the ban?

Answer: Chrysotile (white)

Chrysotile (white asbestos) accounted for approximately 90-95% of all asbestos used in the UK. It was widely used in cement products, brake linings, and roofing materials.

What makes crocidolite (blue asbestos) particularly dangerous compared to other types?

Answer: Its fibres are the thinnest and most easily inhaled

Crocidolite (blue asbestos) has the thinnest, most needle-like fibres of all asbestos types, making them the most easily inhaled deep into the lungs. While all asbestos types are dangerous, crocidolite is considered the most hazardous.

When was the use of all asbestos types finally banned in the UK?

Answer: 1999

The UK banned all use of asbestos in 1999. Blue and brown asbestos were banned earlier in 1985, but white asbestos (chrysotile) continued to be used until the complete ban in 1999.

Which property of asbestos fibres made them commercially valuable for building materials?

Answer: They are excellent insulators and fire-resistant

Asbestos fibres are excellent thermal and electrical insulators, highly fire-resistant, and add tensile strength to materials. These properties made them extremely valuable in construction and manufacturing.