Blown Asphalt 10/20 is a type of oxidized bitumen commonly used in industrial applications such as roofing, waterproofing, insulation, and road construction. The 10/20 grading refers to its penetration grade, meaning it has a penetration value of 10 to 20 (0.1 mm) at standard conditions (25°C, 100g, 5s), which indicates it is a hard and stiff bitumen.
Key Properties of Blown Bitumen 10/20:
• Penetration: 10–20 (0.1 mm)
• Softening Point: Typically between 58°C – 68°C
• Flash Point: Above 230°C
• Ductility: Low (due to oxidation, making it more brittle)
• Solubility in Trichloroethylene: ~99%
• Temperature Sensitivity: Lower than penetration bitumen, making it more resistant to temperature changes.
Uses of Blown Bitumen 10/20:
1. Road Construction & Pavements – Used in hot mix asphalt for heavy-duty roads, highways, and airport runways.
2. Roofing & Waterproofing – Applied in the manufacture of roofing felt, membranes, and insulation materials.
3. Pipe Coating – Used to protect pipes from corrosion in oil, gas, and water pipelines.
4. Asphalt Production – Added to asphalt mixes to improve durability.
5. Paints & Adhesives – Used as a component in industrial adhesives, mastics, and protective coatings.
How Blown Bitumen 10/20 is Produced:
It is manufactured by oxidizing vacuum bottom residue (VB), a byproduct of crude oil distillation, through the introduction of hot air at high temperatures. This process increases viscosity, reduces penetration, and raises the softening point, making it more resistant to extreme weather conditions.
Oxidized Asphalt 10/20 Applications
Oxidized asphalt (also known as blown bitumen) with a penetration grade of 10/20 is a hard, brittle form of bitumen used in various industrial and construction applications. The oxidation process improves its resistance to temperature variations and aging. Here are some key applications of oxidized asphalt 10/20:
Waterproofing
• Used in roofing felt, membranes, and coatings for waterproofing buildings, bridges, and tunnels.
• Protects concrete and metal structures from water infiltration.
Road Construction & Pavement
• Added to asphalt mixes for high-performance road surfacing.
• Used in mastic asphalt for durability and skid resistance.
Industrial Applications
• Pipe Coating: Acts as an anti-corrosion layer for pipelines.
• Electrical Insulation: Used in cables and transformers for insulation.
• Battery Manufacturing: Used as a binder and sealant in battery cells.
Roofing and Shingles
• Main component in roofing felt, bituminous membranes, and shingles.
• Provides weather resistance and longevity to roofs.
Adhesives and Sealants
• Used in the production of industrial adhesives and mastics.
• Serves as a sealing agent in construction joints and expansion joints.
Paints and Coatings
• Used in protective coatings for steel and concrete structures.
• Acts as a base for bituminous paints and anti-corrosion coatings.
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