VG-20 Bitumen Specification
Last updated: 2026-09-30
VG-20 Bitumen Specification: Direct Answer
VG-20 bitumen is an Indian Standards (IS 73:2013) grade with a kinematic viscosity of 1600–2400 Poises at 60°C, a penetration range of 60–70 dmm at 25°C, and a softening point of 45–55°C. It is used in hot-mix asphalt for wet, high-rainfall regions and heavy-traffic corridors, and typically trades at USD 430–520 per metric ton FOB depending on origin and season.
VG-20 Bitumen: Complete Specification Table (IS 73:2013)
The table below is the legally binding specification for VG-20 as defined by the Bureau of Indian Standards. Every parameter below is a pass/fail requirement — not a guideline.
| Property | Test Method | VG-20 Requirement |
|---|---|---|
| Penetration at 25°C, 100 g, 5 s | IS 1203 | 60–70 dmm |
| Kinematic viscosity at 135°C | IS 1206 (Part 3) | min 350 cSt |
| Kinematic viscosity at 60°C | IS 1206 (Part 3) | 1600–2400 Poises |
| Flash point (Cleveland Open Cup) | IS 1209 | min 220°C |
| Solubility in trichloroethylene | IS 1216 | min 99.0% |
| Softening point (R&B) | IS 1205 | 45–55°C |
| Penetration drop after RTFOT at 25°C | IS 1203 | max 20% of original |
| Viscosity ratio after RTFOT at 60°C | IS 1206 | max 4.0 |
| Ductility at 25°C | IS 1208 | min 50 cm |
| Specific gravity at 27°C | IS 1202 | min 0.99 |
Why the 1600–2400 Poise window matters: VG-20 sits between VG-10 (800–1200 Poise) and VG-30 (2400–3600 Poise). The tighter viscosity band gives better rutting resistance than VG-10 while remaining workable at lower compaction temperatures than VG-30.
VG-20 vs VG-10 vs VG-30: Full Comparison
Selecting the wrong grade is the single most common procurement error in South Asian road projects. Use this table to confirm your grade.
| Parameter | VG-10 | VG-20 | VG-30 |
|---|---|---|---|
| Viscosity at 60°C (Poise) | 800–1200 | 1600–2400 | 2400–3600 |
| Penetration at 25°C (dmm) | 80–100 | 60–70 | 50–60 |
| Softening point (°C) | 40–50 | 45–55 | 50–60 |
| Typical climate | Cool, dry | Wet, moderate–hot | Hot, heavy traffic |
| Max rainfall suitability | Low | High monsoon zones | Any |
| Typical use | Low-volume roads | National highways, urban arterial roads | Expressways, airports, container terminals |
| Reference price (INR/MT, ex-refinery) | 46,000–50,000 | 52,000–58,000 | 56,000–62,000 |
Practical selection rule: If your project specification cites IRC:111 or MoRTH Clause 500 for wet zones, VG-20 is almost always the correct call. If the design traffic exceeds 30 msa (million standard axles), move up to VG-30 or modified bitumen.
VG-20 Physical and Chemical Characteristics
| Temperature | State / Behavior | Practical Impact |
|---|---|---|
| 27°C | Semi-solid | Handling and storage |
| 60°C | Reference viscosity point (1600–2400 P) | Rutting resistance benchmark |
| 135°C | Liquid, ≤350 cSt minimum applied | Pumping, mixing, spray application |
| 160–165°C | Recommended mixing temperature | Optimal aggregate coating |
| 220°C+ | Flash point threshold | Safety limit — never exceed |
- Asphaltene content: 15–22% — drives stiffness and aging resistance
- Maltene fraction (saturates + aromatics + resins): 78–85%
- Sulfur content: typically under 4.5% for refinery-sourced VG-20
- SARA balance: higher resin-to-asphaltene ratio improves adhesion to aggregate
Aging resistance note: VG-20 must retain a viscosity ratio of max 4.0 after RTFOT. Grades that fail this test lose ductility within 18–24 months of service, leading to premature cracking.
Grades, Packaging, and Delivery Data
| Format | Net Weight | Typical Use |
|---|---|---|
| New steel drum | 180–182 kg | Export, manual handling sites |
| Jumbo bag (bitutainer) | 1,000–1,300 kg | Bulk road projects |
| Bitutank / ISO tank | 20–24 MT | Large contracts |
| Bulk tanker | 20–30 MT | Domestic refinery dispatch |
- 20-ft container: ~110 drums = ~20 MT VG-20
- 40-ft container: ~180 drums = ~32–33 MT (weight-limited, not volume-limited)
- Flexitank in 20-ft: 21–22 MT (higher payload than drummed cargo)
Price logic: Drummed VG-20 carries a USD 25–40/MT premium over bulk flexitank because of steel and stuffing costs. On a 500 MT order, that premium equals USD 12,500–20,000 — material to your landed cost.
Testing, Quality Checks, and Certification
| Day | Activity | Responsibility |
|---|---|---|
| Day 0 | Sample drawn from tank/drum | Refinery QC |
| Day 1–2 | Penetration, softening point, viscosity tests | Third-party lab |
| Day 3 | RTFOT aging test (if required) | Third-party lab |
| Day 4–5 | Certificate of Analysis issued | Lab + supplier |
| Day 6–8 | Pre-shipment inspection (PSI) | Buyer's agent |
Key documents to demand:
- Certificate of Analysis (COA) with test values against IS 73:2013 limits
- Third-party lab report (SGS, Intertek, or Bureau Veritas)
- Mill test certificate from the refinery
- MSDS and shipping declaration
Red flag: If a supplier will not provide RTFOT data for viscosity ratio and penetration drop, treat the offer as unverified. These two tests are where substandard VG-20 is exposed.
Market Prices and Buying Variables
| Origin / Format | Price Range (USD/MT) | Notes |
|---|---|---|
| India ex-refinery (bulk) | 430–470 | Domestic INR pricing, converted |
| India FOB drummed | 470–520 | Export packaging premium |
| Middle East FOB | 440–500 | Varies with crude benchmark |
| CIF South Asia | +25–45 over FOB | Freight and insurance |
- Crude oil benchmark: a USD 5/bbl Brent move shifts bitumen prices roughly USD 15–25/MT within 2–4 weeks
- Seasonality: demand peaks October–May in South Asia; prices typically firm 5–8% in Q4
- Order volume: 500 MT+ orders often earn USD 10–20/MT discounts
- Payment terms: LC at sight is standard; CAD or open credit adds 1.5–3%
- Viscosity band position: suppliers delivering consistently at 1900–2100 Poise command a small premium for batch consistency
Cost planning example (500 MT, drummed, CIF):
Base 480 + freight 35 + insurance 5 = USD 520/MT landed → USD 260,000 total. Always build a 3–5% contingency for demurrage, testing, and documentation fees.
FAQ: VG-20 Bitumen Specification
What is the viscosity of VG-20 bitumen?
VG-20 must have a kinematic viscosity of 1600–2400 Poises at 60°C and a minimum of 350 cSt at 135°C, per IS 73:2013. The 60°C figure is the defining parameter that separates it from VG-10 and VG-30.
What is the penetration value of VG-20?
VG-20 has a penetration range of 60–70 dmm at 25°C using a 100 g needle for 5 seconds. After RTFOT aging, penetration must drop by no more than 20% of the original value.
Where should VG-20 bitumen be used?
VG-20 is specified for hot-mix asphalt in wet, high-rainfall regions and moderate-to-heavy traffic corridors such as national highways and urban arterial roads. It performs best where design traffic is under 30 msa; above that, specify VG-30.
How much does VG-20 bitumen cost per ton?
Indicative pricing runs USD 430–470/MT ex-refinery bulk and USD 470–520/MT FOB drummed, with CIF adding USD 25–45/MT. Crude benchmarks, season, and order volume (500 MT+ earns USD 10–20/MT off) are the main price drivers.
How many drums of VG-20 fit in a 20-ft container?
A standard 20-ft container holds approximately 110 drums, totaling about 20 MT of VG-20. A 40-ft container holds roughly 180 drums (~32–33 MT) but is limited by permissible cargo weight rather than volume.
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