Answer:
Hey ... I came across this because I had to do some school work ...
The vast majority of refined bitumen is used in construction. Not in itself an interpreted, bitumen's primary use is as a constituent of products used in paving and roofing applications.
Approximately 85 per cent of all the bitumen produced worldwide is used as the binder in asphalt for roads. It is also used in other paved areas such as airport runways, car parks and footways. Typically, the production of asphalt involves mixing sand, gravel and crushed rock with bitumen which acts as the binding agent. Other materials, such as polymers, may be added to the bitumen to alter its properties according to the application for which the asphalt is ultimately intended.
A further 10 per cent of global bitumen production is used in roofing applications, where its waterproofing qualities are invaluable.
The remaining five per cent of bitumen is used mainly for sealing and insulating purposes in a variety of building materials, such as pipe coatings, carpet tile backing and paint.
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