Viscosity 20 bitumen VG-20 is commonly used in areas with cold climates or high elevations. Road construction with this grade of bitumen is appropriate for regions whose average temperature is between 30 and 37 °C. Hot mix asphalt is typically made from VG20 in North India. Viscosity grade VG-20 penetration is 60mm at 25 °C as a standard. A viscosity of VG-20 bitumen at 60 degrees Celsius ranges between 1600 and 2400 poise.
Specification | Acceptable Range | Test Method | Explanations |
---|---|---|---|
Absolute Viscosity | Min 1600 | ASTM – D4402 | at 60°C, Poises |
Kinematic Viscosity | Min 300 | ASTM – D4402 | at 135°C, c.st |
Solubility | 99.0 Min | ASTM – D2042 | in CCL4, % |
Flash Point | 220 Min | ASTM – D92 | °C |
Penetration | 60-80 | ASTM – D5 | at 25°C, mm/10 |
Softening Point | Min 45 | ASTM – D36 | °C |
Ratio Viscosity | Max 4.0 | ASTM – D4402 | at 60°C, % |
Ductility | Min 50 | ASTM – D113 | at 25°C, cm |
This Bitumen VG 20 formulation is widely used for spraying applications, including surface-dressing and paver applications for cold climates and high-altitude regions. In addition, it is used in asphalt emulsions and modified asphalt. As a hot mix asphalt base course and wear course, this grade of bitumen is most commonly used.
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