Oxidized bitumen 105/35 (blown bitumen 105/35 or R105/35) is a hard/solid grade of oxidized bitumen. This grade is produced under special conditions, controlled and monitored temperature, pressure and reactor feet.
Raw material for this grade is penetration bitumen 60/70. By passing pure penetration bitumen through continuously blown highly heated air, oxidized bitumen 105/35 is obtained.
Two numbers classify this grade of blown bitumen, the first number is softening point, and the second number is needle penetration which are 105 °C and 35 desi-millimeter, respectively. R105/35 has wide usage in numerous industries like construction, coating, sealing, automotive, etc.