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Viscosity Grade

Explore Bernet Viscosity Grade Bitumen, VG-10 to VG-40H (IS 73) and C50 to C600 (AS 2008). Engineered for viscosity precision, adhesion, and high-performance road durability.

High-Quality Viscosity Grade Bitumen

Viscosity Grade (VG & C) Bitumen

Bernet Bitumen produces a full range of Viscosity Grade (VG) and C-Class (Australian Standard) bitumens, engineered for precise performance control in diverse climates and traffic conditions.
Viscosity grading ensures consistent performance by measuring binder flow at specific temperatures, providing a far more reliable measure of pavement behavior than the older penetration system.
Our VG and C-grade bitumens are formulated from high-quality crude sources, refined and blended to meet the most stringent global specifications including IS 73:2013 (Indian Standard Viscosity Grades), ASTM D3381, and AUSTROADS AS 2008.

Engineered for Predictable Performance

Viscosity Grade Bitumen ensures that each product performs consistently at both mixing (135°C) and compaction (60°C) temperatures.
This precision control allows contractors and engineers to achieve:

Stable mixing and compaction temperatures
Predictable flow behavior across climates
Improved adhesion and resistance to rutting or fatigue

Quality You Can Build On

Comprehensive Range of Viscosity Grade Bitumen

Below are our standard Viscosity Grade Bitumen. Each section provides a short technical overview, indicative property ranges, typical applications, and standards. Where projects require tighter tolerances, we provide custom production and technical support.

Indian Standard Viscosity Grades (IS 73:2013)

These grades are designed according to the Bureau of Indian Standards (IS 73:2013) for use in India, Asia, and tropical regions.

Bitumen VG-10

Overview: A soft, low-viscosity grade suitable for cold regions and low-traffic roads. Provides easy coating and compaction at low temperatures.
Indicative properties: Viscosity at 60°C: 800–1200 poise, softening point 45–52°C, penetration 80–100 (0.1 mm), flash point ≥220°C.
Applications: Ideal for surface dressing, premix carpets, thin overlays, and cold-climate pavements.
Standards: Complies with IS 73:2013 (VG-10) and ASTM D3381.

Bitumen VG-20

Overview: A medium-stiffness binder formulated for temperate climates and moderate traffic volumes.
Indicative properties: Viscosity at 60°C: 1600–2400 poise, softening point 47–55°C, penetration 60–80 (0.1 mm), ductility ≥75 cm.
Applications: Used in binder and wearing courses, dense bituminous macadam (DBM), and bituminous concrete (BC) mixes.
Standards: Conforms to IS 73:2013 (VG-20) and ASTM D3381.

Bitumen VG-30

Overview: A stiffer, high-viscosity binder recommended for hot climates and heavily trafficked pavements.
Indicative properties: Viscosity at 60°C: 2400–3600 poise, softening point 50–60°C, penetration 50–70 (0.1 mm).
Applications: Preferred for national highways, expressways, and industrial pavements exposed to high ambient temperatures.
Standards: Meets IS 73:2013 (VG-30) and ASTM D3381.

Bitumen VG-40

Overview: A very stiff binder for heavy-load and high-temperature zones requiring superior rutting resistance.
Indicative properties: Viscosity at 60°C: 3200–4800 poise, softening point 55–65°C, penetration 40–60 (0.1 mm).
Applications: Used in airfields, expressways, ports, and heavy-duty pavements.
Standards: Complies with IS 73:2013 (VG-40) and ASTM D3381.

Bitumen VG-40 H (Heavy Grade)

Overview: A special high-viscosity variant of VG-40, offering extra stiffness and load-bearing capacity for extreme service conditions.
Indicative properties: Viscosity at 60°C: ≥4800 poise, softening point ≥65°C, penetration 40–50 (0.1 mm). Enhanced rutting resistance and stability.
Applications: Ideal for airports, container terminals, and desert expressways.
Standards: Conforms to IS 73:2013 (VG-40 H) and ASTM D3381.

Australian Standard Viscosity Grades (AS 2008 / AUSTROADS)

These “C” grades comply with the Australian Standard AS 2008 and Austroads AGPT/T190, ensuring reliable viscosity and stiffness for performance-based design under Australia’s warm and variable climates.

Bitumen C50

Overview: A soft paving binder designed for cool climates and light-traffic applications.
Indicative properties: Viscosity at 60°C: 30–60 Pa·s, softening point 42–48°C, penetration 80–100 (0.1 mm).
Applications: Used in spray sealing, cold-mix asphalt, and maintenance works.
Standards: Complies with AS 2008 (C50) and Austroads AGPT/T190.

Bitumen C170

Overview: A general-purpose paving binder widely used for Australian road construction under moderate climatic conditions.
Indicative properties: Viscosity at 60°C: 140–200 Pa·s, softening point 46–54°C, penetration 65–90 (0.1 mm).
Applications: Suitable for dense-graded and open-graded asphalt mixes, and surface dressing.
Standards: Complies with AS 2008 (C170) and Austroads AGPT/T190.

Bitumen C240

Overview: A stiffer binder for warmer climates or heavy-load pavements requiring higher viscosity and stability.
Indicative properties: Viscosity at 60°C: 200–280 Pa·s, softening point 50–58°C, penetration 55–75 (0.1 mm).
Applications: Used in binder and wearing courses for highways and industrial pavements.
Standards: Conforms to AS 2008 (C240) and Austroads AGPT/T190.

Bitumen C320

Overview: A high-viscosity binder ideal for hot climates and high-stress traffic areas.
Indicative properties: Viscosity at 60°C: 260–380 Pa·s, softening point 55–65°C, penetration 45–65 (0.1 mm).
Applications: Airports, expressways, and high-performance asphalt layers.
Standards: Complies with AS 2008 (C320) and Austroads AGPT/T190.

Bitumen C450

Overview: A special binder for very hot environments and industrial-grade pavements exposed to heavy loads.
Indicative properties: Viscosity at 60°C: 400–500 Pa·s, softening point ≥60°C, penetration 35–55 (0.1 mm).
Applications: Used for airport taxiways, port facilities, and high-temperature construction zones.
Standards: Complies with AS 2008 (C450) and Austroads AGPT/T190.

Bitumen C600

Overview: The stiffest Australian binder grade, engineered for extreme heat and maximum load-bearing performance.
Indicative properties: Viscosity at 60°C: ≥600 Pa·s, softening point ≥65°C, penetration 25–45 (0.1 mm). Excellent rutting resistance and durability.
Applications: Heavy-load industrial pavements, airports, and expressways in desert or tropical regions.
Standards: Conforms to AS 2008 (C600) and Austroads AGPT/T190.

Applications & Advantages

Consistent viscosity ensures predictable mix design and compaction
Improved temperature susceptibility control
Excellent adhesion and cohesive strength
Reliable long-term pavement stability and aging resistance
Compatibility with hot-mix, warm-mix, and polymer modification systems

Why Choose Bernet Bitumen

Full compliance with IS 73:2013, ASTM D3381, and AS 2008
ISO-certified production and testing facilities
Export-ready packaging for bulk or drum shipments
Expert technical support and documentation for each project

Bernet Bitumen VG Bitumen Grades Technical Data (Consolidated)

Grade	Absolute / Kinematic Viscosity	Penetration @25°C (0.1mm)	Flash Point (°C)	Softening Point (°C)	Solubility (%)	Insoluble Matter (%)	RTFOT / TFOT Viscosity Ratio	Ductility after RTFOT (cm)	Test Standard	Packaging
C50	Viscosity 60°C: 40–60 Pa.s Viscosity 135°C: 0.2–0.3 Pa.s	130	250	—	—	≤1	Residue viscosity ≤300%	—	ASTM D2171, D2170, D5, D92, D4072	185KG Steel Drum / 1MT Framed Jumbo Bag
C170	Viscosity 60°C: 140–200 Pa.s Viscosity 135°C: 0.25–0.45 Pa.s	62	250	—	99	≤1	Residue viscosity ≤300%	—	ASTM D2171, D4402, D5, D70, D2042, D92	185KG Steel Drum / 1MT Framed Jumbo Bag
C240	Viscosity 60°C: 190–280 Pa.s Viscosity 135°C: 0.32–0.55 Pa.s	53	250	—	99	≤1	Residue viscosity ≤300%	—	ASTM D2171, D4402, D5, D2042, D92	185KG Steel Drum / 1MT Framed Jumbo Bag
C320	Viscosity 60°C: 260–380 Pa.s Viscosity 135°C: 0.4–0.65 Pa.s	40	250	—	99	≤1	Residue viscosity ≤300%	—	ASTM D2171, D2170, D5, D92, D4072	185KG Steel Drum / 1MT Framed Jumbo Bag
C450	Viscosity 60°C: 750–1150 Pa.s Kinematic 135°C: ≤0.7 Pa.s	Report	250	—	99	≤1	—	—	ASTM D2171, D2170, D5, D92, D4072	185KG Steel Drum / 1MT Framed Jumbo Bag
C600	Viscosity 60°C: 500–700 Pa.s Kinematic 135°C: ≤0.85 Pa.s	0.1	250	—	99	≤1	Residue viscosity ≤300%	—	ASTM D2171, D2170, D5, D92, D4072	185KG Steel Drum / 1MT Framed Jumbo Bag
VG10	Viscosity 60°C: ≥800 poise Viscosity 135°C: ≥250 cSt	80–100	220	40	99	—	Ratio ≤4	≥75	ASTM D4402, D2170, D93, D2042, D5, D36, D113	185KG Steel Drum / 1MT Framed Jumbo Bag
VG20	Viscosity 60°C: ≥1600 poise Viscosity 135°C: ≥300 cSt	60–80	220	45	99	—	Ratio ≤4	≥50	ASTM D4402, D2170, D93, D2042, D5, D36, D113	185KG Steel Drum / 1MT Framed Jumbo Bag
VG30	Viscosity 60°C: ≥2400 poise Viscosity 135°C: ≥350 cSt	50–70	220	47	99	—	Ratio ≤4	≥40	ASTM D4402, D2170, D93, D2042, D5, D36, D113	185KG Steel Drum / 1MT Framed Jumbo Bag
VG40	Viscosity 60°C: ≥3200 poise Viscosity 135°C: ≥400 cSt	35–60	220	50	99	—	Ratio ≤4	≥25	ASTM D4402, D2170, D93, D2042, D5, D36, D113	185KG Steel Drum / 1MT Framed Jumbo Bag
VG40-H	Viscosity 60°C: ≥4000 poise Viscosity 135°C: ≥400 cSt	35–60	220	50	99	—	Ratio ≤4	≥25	ASTM D4402, D2170, D93, D2042, D5, D36, D113	185KG Steel Drum / 1MT Framed Jumbo Bag