Bitumens materials are also more diverse than oil, because bitumen has other sources besides oil.

Bitumen are divided into the following three categories depending on the origin:

1.Natural bitumen

This natural asphalt has hardened like a crude oil asphalt. Usually the names asphalt, euthanate and asphalt are also used for this material. “Natural bitumen, like natural asphalt, is soluble in aliphatic and aromatic solvents.” Due to the high compatibility of this product, it is usually used to harden dilute petroleum derivatives.

2.Petroleum bitumen

Petroleum bitumen are solid and semi-solid bitumens that are obtained directly from the distillation of crude oil or by other additional operations such as blowing air. Residual or heavy oil bitumen is the distillation of crude oil. The amount of crude oil bitumen varies from zero to more than half of it. In addition, bitumens obtained from different sources can have many differences. Therefore, bitumen refineries must carefully choose their crude oil to ensure the quality of bitumen.

3.Tar bitumen

Types of bitumen Chemically, there are different classifications for bitumen, two of the most common of which are based on the natural or petroleum nature of bitumen and the most common case is based on the type of source of bitumen supply, i.e. oil or coal or wood.

Bitumen specifications

1-Degree of influence

2-Viscosity

3-Degree of ignition

4-Weight loss

5-Ductility or shape

6-Degree of purity

7-degree of softness