Oxidized Bitumen

Oxidized Bitumen, also known as Blown Bitumen, is a type of bitumen that undergoes an oxidation process to enhance its properties. This process involves blowing hot air (200–300°C) through penetration-grade bitumen, which increases its softening point and reduces its penetration rate.

Key Properties

  1. Higher Softening Point: More resistant to temperature fluctuations.
  2. Lower Penetration Rate: Makes it harder and more durable.
  3. Rubbery Texture: Due to polymerization during oxidation.
  4. Waterproof & Chemically Stable: Ideal for industrial applications.

 

Types of Oxidized Bitumen

 

Oxidized bitumen is categorized based on its softening point and penetration rate. Some popular grades include:

  1. 85/25
  2. 90/40
  3. 115/15
  4. 95/25
  5. 75/25

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