Bitumen is a product of Crude oil Distillation. It is a semi-solid hydrocarbon product produced by removing the lighter fractions (such as liquid petroleum gas, petrol and diesel) from heavy crude oil during the refining process. As such, it is correctly known as refined bitumen.
In North America, bitumen is commonly known as “asphalt cement” or “asphalt”. While elsewhere, “asphalt” is the term used for a mixture of small stones, sand, filler and bitumen, which is used as a road paving material. The asphalt mixture contains approximately 5% bitumen. At ambient temperatures bitumen is a stable, semi-solid substance.
The Sumerians also used it as early as the third millennium BCE in statuary, mortaring brick walls, waterproofing baths and drains, in stair treads, and for shipbuilding. Other cultures such as Babylon, India, Persia, Egypt, and ancient Greece and Rome continued these uses, and in several cases the bitumen has continued to hold components securely together to this day. In some versions of the Book of Genesis in the Bible, the name of the substance used to bind the bricks of the Tower of Babel is translated as bitumen. Although its existence has not been confirmed, a one-kilometer tunnel beneath the river Euphrates at Babylon in the time of Queen Semiramis (ca. 700 B.C.) was reportedly constructed of burnt bricks covered with bitumen as a waterproofing agent.The term bitumen comes from Latin. The Greek name for the substance was ?σφαλτος (asphaltos). Approximately 40 A.D. Dioscorides described production of asphaltos (as distinguished from piss asphalt and naphtha): (1655 Goodyear translation). The terms asphalt and bitumen are often used interchangeably to mean both natural and manufactured forms of the substance.
Known for its adhesive and cohesive assets, bitumen is mostly utilised in the construction industry. Bitumen is applied on road paving because it is viscous when hot, but solid once it cools down. Therefore Bitumen operates as the binder/glue for pieces of the aggregate.
The vast majority of refined bitumen is used in construction: primarily as a constituent of products used in paving and roofing applications. According to the requirements of the end use bitumen is produced to specification. This is achieved either by refining process or blending.
It is estimated that the current world use of bitumen is approximately 102 million tonnes per year. Approximately 85% of all the bitumen produced is used as the binder in asphalt for roads.
Bitumen is applied in construction and maintenance of:
under construction
under development
under development
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