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VG-10
Viscosity Grades (VG) Bitumen is a standardized classification of bitumen based on its viscosity at specific temperatures. These grades are designed to ensure performance consistency and suitability for various applications, especially in road construction and other industrial uses.
Primary Use
- Manufacturing of Bitumen Emulsion.
- Suitable for cold climates where low-temperature flexibility is essential.
- Used in surface dressing, paving roads, and soil stabilization in regions with moderate weather conditions.
Key Properties
- Provides low viscosity, making it easier to blend and mix with other components during emulsion manufacturing.
- Enhances adhesion between aggregates and bitumen in emulsions.
Applications:
- Producing Rapid Setting (RS), Medium Setting (MS), and Slow Setting (SS) emulsions.
- Used in spray applications, prime coats, and tack coats.
Specifications of VG-10 Bitumen According to IS: 73-2018
IS: 73-2018, issued by the Bureau of Indian Standards (BIS), provides the comprehensive specifications for paving bitumen, including VG-10. This standard ensures consistent and reliable performance, particularly for road construction and related applications. Below are the key specifications for VG-10 Bitumen as per IS: 73-2018:
| Property | Requirement for VG-10 | Test Method |
|---|---|---|
|
Viscosity @ 60°C, Poise |
Min. 100 – Max. 200 |
IS 1206 (Part 2) |
|
Viscosity @ 135°C, cSt |
Min. 250 |
IS 1206 (Part 3) |
|
Penetration @ 25°C, 0.1 mm |
80 – 100 |
IS 1203 |
|
Softening Point, °C |
Min. 40 |
IS 1205 |
|
Ductility @ 25°C, cm |
Min. 75 |
IS 1208 |
|
Flash Point, °C |
Min. 220 |
IS 1448 (Part 20) |
|
Solubility in TCE, % |
Min. 99 |
IS 1216 |
Explanation of Key Properties:
Viscosity at 60°C: This measures the thickness or flow resistance of the bitumen. For VG-10, it should range between 100 and 200 Poise, ensuring the bitumen remains workable at temperatures common in cooler climates.
Viscosity at 135°C: It is essential for understanding the flow behavior of bitumen during mixing and laying. A minimum of 250 cSt ensures proper mixing at high temperatures.
Penetration: Penetration is a measure of the hardness of the bitumen. VG-10 should have a penetration range of 80-100 at 25°C, indicating a softer consistency suitable for colder environments.
Softening Point: This measures the temperature at which the bitumen starts to soften. VG-10 should have a minimum softening point of 40°C, providing enough stability in moderate temperatures.
Ductility: Ductility refers to the ability of the bitumen to stretch without breaking. VG-10 bitumen must have a minimum ductility of 75 cm, ensuring it can accommodate temperature changes without cracking.
Flash Point: The flash point indicates the safety level of bitumen during handling. VG-10 should have a minimum flash point of 220°C, ensuring that it is safe for use in hot environments.
Solubility in TCE: This test measures the purity of the bitumen. VG-10 should have a minimum solubility of 99% in Trichloroethylene (TCE), ensuring that it is mostly pure and free of impurities.
Elastic Recovery and Residue Ductility: After distillation, the bitumen must exhibit 50% or more elastic recovery and 25 cm ductility, ensuring flexibility and the ability to return to its original shape after being deformed