DESCRIPTION OF OXIDIZED BITUMEN 75/30
Pure bitumen, which is equal to penetration bitumen 60/70 when blown over, becomes oxidized bitumen 75/30, sometimes referred to as blown asphalt 75/30 or blown bitumen 75/30. When compared to pure bitumen, it has a lower penetration grade and a higher softening point. It becomes flexible bitumen when the asphaltene in this bitumen polymerizes in response to wind. Because of the rubber component—as the symbol R indicates—this bitumen is often referred to as Rubberized Bitumen.
These figures indicate the softening point and penetration depth. For instance, Oxidized Bitumen R75/30 has a specification that specifies that it has a penetration grade of 30 and a softening point of 75.
We manufacture the highest quality Oxidized Bitumen 75/30 ( Blown Asphalt 75/30) in different types and export them from Iran and the UAE to other countries around the world.
Penetration grade bitumen is heated to a temperature of between 220 and 230 degrees Celsius in the refinery’s BBU reactor to produce oxidized bitumen 75/30. The heated air in the reactor causes the hydrogen atoms of the bitumen to interact with the oxygen atoms of the air. Steam is then generated, and it has to be evacuated from the oxidation chamber. Thus, there is still oxidized bitumen.
The following are the primary benefits of oxidized bitumen 75/30:
Complete resistance to water, extraordinary pliability, durability, and chemical stability.
|Softening Point (̊C)||ASTM D36||75±5|
|Peneteration at 25 ̊C||ASTM D5||30±5|
|Thermal Loss %||ASTM D1754||0.2|
|Solubility in trichloroethylene||ASTM D2042||99.5|