What is Oxidized Bitumen?
Oxidized bitumen, also known as blown asphalt, is a type of bitumen that has undergone a controlled oxidation process. This process involves blowing air through the bitumen at high temperatures, which causes it to become harder and more viscous. The oxidation process enhances the bitumen's thermal stability and resistance to aging, making it suitable for various industrial applications.
?
?Key Properties of Oxidized Bitumen:
- Increased Hardness and Viscosity: The oxidation process results in a material that is significantly harder and more viscous than regular bitumen.
- Improved Thermal Stability: Oxidized bitumen can withstand higher temperatures without losing its structural integrity.
- Enhanced Aging Resistance: The material is more resistant to the effects of aging, such as cracking and brittleness.
- Water Resistance: It has excellent resistance to water, making it ideal for waterproofing applications.
?Famous Grades of Oxidized Bitumen
Oxidized bitumen is classified into various grades based on its softening point and penetration value. These grades determine its suitability for different applications. Here are some of the most popular grades:
?
1. 85/25: This grade has a softening point of 85°C and a penetration value of 25 dmm (Deci millimeters). It is commonly used in roofing, waterproofing, and industrial applications.
?
2. 90/40: With a softening point of 90°C and a penetration value of 40 dmm, this grade is suitable for applications requiring a balance between hardness and flexibility, such as road construction and industrial coatings.
?
3. 95/25: This grade has a higher softening point of 95°C and a penetration value of 25 dmm. It is often used in environments with high temperatures and for applications needing extra durability.
?
4. 115/15: Known for its high softening point of 115°C and low penetration value of 15 dmm, this grade is ideal for specialized industrial applications where extreme temperature resistance is required.
?
?Applications of Oxidized Bitumen
Oxidized bitumen is widely used in various industries due to its enhanced properties. Some common applications include:
- Roofing: Used as a waterproofing agent and adhesive in roofing felt and shingles.
- Road Construction: Employed in the construction of roads and pavements due to its durability and resistance to temperature fluctuations.
- Industrial Coatings: Applied as a protective coating for pipelines, tanks, and other industrial equipment.
- Flooring: Used in the production of industrial flooring materials that require high durability and resistance to wear and tear.
?
?Conclusion
Oxidized bitumen is a versatile material with enhanced properties that make it suitable for a wide range of industrial applications. Its various grades, such as 85/25, 90/40, 95/25, and 115/15, offer different levels of hardness, viscosity, and thermal stability, catering to specific needs in construction, waterproofing, and industrial coatings.