Bitumen is a black to dark brown sticky substance made up primarily of high molecular weight hydrocarbons. It is a semi-solid hydrocarbon byproduct of crude oil distillation, created by separating the lighter fractions (such as liquid petroleum gas, petrol, and diesel) from heavy crude oil during the refining process. Bitumen's physical qualities include adhesion, water resistance, hardness, ductility, and a greater softening point
 
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