Viscosity Grades
Viscosity grade bitumen is classified based on its measured resistance to flow at specific temperatures, primarily at 60°C and 135°C. Instead of relying on penetration depth, this grading system uses viscosity as the key parameter, providing a more accurate indicator of how the bitumen will perform under different climate and traffic conditions. The higher the viscosity, the stiffer the bitumen, which translates to better resistance against deformation and rutting in high-temperature environments. This system is particularly valuable for modern road engineering where performance predictability is essential.
At Black Gold Company, we supply premium viscosity grade bitumen products that meet the highest international standards. Designed to provide exceptional performance across various climates and construction demands, our VG bitumen grades are ideal for use in high-traffic roads, urban infrastructure, and industrial paving projects. Viscosity grading allows engineers to choose bitumen that will maintain its structural integrity over time, minimizing maintenance needs and maximizing road lifespan.
Why Choose Black Gold for Viscosity Grade Bitumen?
Black Gold has earned a strong reputation as a dependable supplier of viscosity grade bitumen, delivering consistency, performance, and value in every shipment. Our products are rigorously tested to ensure precise viscosity control, making them highly reliable for both standard and demanding applications. With a dedicated quality assurance process and a commitment to customer satisfaction, we support infrastructure projects from planning to completion, ensuring long-term durability and optimal performance.
Add Your Heading Text Here
Applications of Viscosity Grade Bitumen
Viscosity grade bitumen is engineered for a range of challenging environments and construction scenarios, including:
Highways and Expressways: VG bitumen offers superior load-bearing capacity and thermal resistance, making it ideal for roads exposed to intense traffic and heat.
Urban Infrastructure: Its consistent performance across varying temperatures makes VG bitumen suitable for city roads and pavements.
Industrial and Commercial Areas: With higher viscosity levels, it’s perfect for zones requiring robust surface strength and durability.
Heavy-Duty Paving Projects: VG-30 and VG-40 grades are especially suited for airports, ports, and logistic hubs where long-term performance under stress is non-negotiable.
Bitumen Viscosity Analysis VG10
| Test Title | Result | Standard range | TEST Method |
|---|---|---|---|
| SP gr @25/25 cc | 1.01 | Min: 1.01 – Max: 3pa.s | ISIRI 2956 – ASTM D70 |
| Absolute Viscosity @60 cc poises.min | 1092 | Min: 800 – Max: — | ASTM D2171 |
| Penetration @25 cc-100gr-5s | 91.6 | Min: 80 – Max: — | ISIRI 2950 – ASTM D5 |
| Softening Point | 46 | Min: 45 – Max: — | ISIRI 3868 – ASTM D36 |
| Solubility in Trichloroethylene (bitumen content) | 99.98 | Min: 99.5 – Max: — | ISIRI 2953 – ASTM D4 |
| Ductility @25 cc cm | >100 | Min: 100 – Max: 1.00% | ISIRI 3866 – ASTM D113 |
| Flash Point cc | 322 | Min: 232 – Max: — | ISIRI 1175 – ASTM D92 |
| Loss On heating w t% | 0.03 | Min: — – Max: 5000 k Pa | ISIRI 2957 – ASTM D6 |
| Drop Penetration after loss on heat | 8.4 | Min: — – Max: 300 M Pa | ISIRI 2950 – ASTM D6 & D5 |
| Spot Test | Negative | Negative | ISIRI 2949 |
Bitumen Viscosity Analysis VG20
| Test Title | Result | Standard range | TEST Method |
|---|---|---|---|
| SP gr @25/25 cc | 1.01 | Min: 1.01 – Max: 1.06 | ISIRI 2956 – ASTM D70 |
| Absolute Viscosity @60 cc poises.min | 2091 | Min: 1600 – Max: 2400 | ASTM D2171 |
| Penetration @25 cc-100gr-5s | 65.3 | Min: 60 – Max: 70 | ISIRI 2950 – ASTM D5 |
| Softening Point | 49.6 | Min: 46 – Max: 52 | ISIRI 3868 – ASTM D36 |
| Solubility in Trichloroethylene (bitumen content) | 99.98 | Min: 99.5 – Max: — | ISIRI 2953 – ASTM D4 |
| Ductility @25 cc cm | >100 | Min: 100 – Max: — | ISIRI 3866 – ASTM D113 |
| Flash Point cc | 322 | Min: 232 – Max: — | ISIRI 1175 – ASTM D92 |
| Loss On heating w t% | 0.01 | Min: — – Max: 0.2 | ISIRI 2957 – ASTM D6 |
| Drop Penetration after loss on heat | 8.3 | Min: — – Max: 20 | ISIRI 2950 – ASTM D6 & D5 |
| Spot Test | Negative | Negative | ISIRI 2949 |
Bitumen Viscosity Analysis VG30
| Test Title | Result | Standard range | TEST Method |
|---|---|---|---|
| SP gr @25/25 cc | 1.02 | Min: 1.01 – Max: 1.06 | ISIRI 2956 – ASTM D70 |
| Absolute Viscosity @60 cc poises.min | 3200 | Min: 2400 – Max: 3600 | ASTM D2171 |
| Penetration @25 cc-100gr-5s | 52.6 | Min: 50 – Max: 70 | ISIRI 2950 – ASTM D5 |
| Softening Point | 52.4 | Min: 52 – Max: 56 | ISIRI 3868 – ASTM D36 |
| Solubility in Trichloroethylene (bitumen content) | 99.98 | Min: 99.5 – Max: — | ISIRI 2953 – ASTM D4 |
| Ductility @25 cc cm | >100 | Min: 100 – Max: — | ISIRI 3866 – ASTM D113 |
| Flash Point cc | 132 | Min: 232 – Max: — | ISIRI 1175 – ASTM D92 |
| Loss On heating w t% | 0.05 | Min: — – Max: 0.2 | ISIRI 2957 – ASTM D6 |
| Drop Penetration after loss on heat | 8.2 | Min: — – Max: 20 | ISIRI 2950 – ASTM D6 & D5 |
| Spot Test | Negative | Negative | ISIRI 2949 |
Bitumen Viscosity Analysis VG40
| Test Title | Result | Standard range | TEST Method |
|---|---|---|---|
| SP gr @25/25 cc | 1.03 | Min: 1.01 – Max: 1.06 | ISIRI 2956 – ASTM D70 |
| Absolute Viscosity @60 cc poises.min | 4400 | Min: 3200 – Max: 4800 | ASTM D2171 |
| Penetration @25 cc-100gr-5s | 45.7 | Min: 40 – Max: 50 | ISIRI 2950 – ASTM D5 |
| Softening Point | 53.6 | Min: 52 – Max: 56 | ISIRI 3868 – ASTM D36 |
| Solubility in Trichloroethylene (bitumen content) | 99.98 | Min: 99.5 – Max: — | ISIRI 2953 – ASTM D4 |
| Ductility @25 cc cm | >100 | Min: 100 – Max: — | ISIRI 3866 – ASTM D113 |
| Flash Point cc | 132 | Min: 232 – Max: — | ISIRI 1175 – ASTM D92 |
| Loss On heating w t% | 0.05 | Min: — – Max: 0.2 | ISIRI 2957 – ASTM D6 |
| Drop Penetration after loss on heat | 8.2 | Min: — – Max: 20 | ISIRI 2950 – ASTM D6 & D5 |
| Spot Test | Negative | Negative | ISIRI 2949 |
*To download the above tables as a PDF, please click here.
