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Building Materials

Q1: Bitumen in

A solid state, is called asphalt

B semi fluid state, is called mineral tar

C fluid state, is called petroleum

D all the above.

ANS:D - all the above.

Bitumen is the heavy end (i.e. Higher molecular weight) residue from the fractionation of crude oil. When you have extracted such things as fuels, fuel oils, lubricating oils and waxes from the crude oil, what is left is a thick sticky black liquid, consistency anything from "treacle" up to a firm glassy amorphous sold. That is bitumen.

Tar is similar, but is not extracted from crude oil; it is extracted from coal.

Asphalt is a mixture of bitumen and aggregates (inorganic heavy fillers, sands, grit, stones) of various kinds used for construction of road surfaces.



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