These had been tender mixes that must bear combine pushing and shoving under the roller, without which it can't be rolled correctly. To guide the contractors for asphalt mixing and to know the temperature of compaction, no bitumen viscosity is available. The penetration test includes penetration of a needle that's loaded by 100g, into a bitumen pattern maintained at a temperature of 25-diploma Celsius in a water tub for a interval of 5 seconds. To have proper mixing and compaction temperatures for asphalt mixtures, it is essential to find the stiffness of bitumen. Here the stiffness in terms of kinetic viscosity must be determined.