(IS:73-2006) Grade 60/70 and 30/40. Straight grade used in construction and maintenance of roads, airfields and allied constructions, manufacturing of bitumen Emulsions.
Bitumen is the end product in the crude distillation process. This raw bitumen is called Straight grade bitumen and has penetration values of 200-300. The straight grade bitumen obtained from the refineries is processed in our highly modernized plant through the exothermic reaction, to the relevant time limit to produce the desired Paving Grades as per the specifications.
Viscosity Grade bitumen is designed to take care of lowest temperature(responsible for cracking) and maximum temperature(responsible for rutting).