Bitumen penetration grade 60/70 is semi hard penetration grade bitumen using as paving grade bitumen suitable for road construction and repair also for the production of asphalt pavements with below technical specification. This grade of bitumen is mainly used in the manufacture of hot mix asphalt for bases and wearing courses. Bitumen 60/70 is most used bitumen grade and basic material for all other bitumen products. Penetration grade bitumen is pure petroleum grade bitumen, manufactured from vacuum bottom by passing hot air. This bitumen is produced from remain of crude oil after cracking and removing hydrocarbon. Penetration grade bitumen 60/70has penetration between 60~ 70 Desi-millimeters and softening point between 48~ 52C. The penetration grade bitumen 60/70 has a thermoplastic property which is like as synthetic resin material which gets softer with heating and hardens when cooled. This grade of bitumen 60/70 has very strong viscosity compare to other grades.