The use of bitumen on roads in recent times picked up in the 19th  century.

Natural rock asphalt was initially used, but as petroleum distillation began to

grow as an industry to fuel the road vehicles, the resides found equally

increasing use in constructing better roads.

Definition of term bitumen

There is some intermixing of terms such as bitumen and asphalt. Different

countries attach different meanings to these terms. American terminology

uses the name “asphalt” for substances known by the name “bitumen” in

British terminology. ”Bitumen is defined as a viscous liquid, or a solid,

consisting essentially of hydrocarbons and their derivatives, which is soluble

in carbon disulphide”.

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