The Bitumen mode is dependent on temperature. The temperature-vs-stiffness relationship of bitumen is dependent on the type of crude oil and its refining method. Bitumen penetration grade 50/70 is semi hard penetration grade bitumen used as a paving grade bitumen which is suitable for road. It is also used for the production of asphalt pavements . This grade of bitumen is mainly used in the manufacturing of hot mix asphalt for bases and wearing courses. Bitumen 50/70 is one of the most used bitumen grades and it’s a basic material for all other bituminous products.