Bitumen is black semi solid heavy hydrocarbon which by cool done of ambient temperature will convert to solid. With increase of temperature the bitumen will become semi solid and then liquid. Main content of bitumen us hydrocarbon with high molecular weight contenting oil, resin and asphalten.

bitumen penetration grades are hard penetration grade bitumen using as paving grade bitumen

suitable for road repair and  construction  also for the production of asphalt pavements with below

technical specification. This grade of bitumen is mainly used in the manufacture of hot mix