Bitumen 60/70 vs Bitumen 80/100
A complete technical comparison to help engineers, contractors, and buyers choose the right penetration grade for their climate, traffic load, and project type.
🛣️ Road Applications
📐 Technical Specs
📦 FOB Turkey Supplier
Quick Answer: Bitumen 60/70 is harder, more durable, and best for hot climates and high-traffic roads. Bitumen 80/100 is softer, more workable, and better suited for cold climates and lighter-duty applications. Both grades comply with ASTM D946 and EN 12591 standards and are available FOB Iskenderun port.
Choosing between Bitumen 60/70 and Bitumen 80/100 is one of the most common decisions in road construction and infrastructure projects worldwide. While both belong to the penetration grade bitumen family, their differences in hardness, softening point, and workability make each grade distinctly suited to different conditions.
This guide provides a thorough side-by-side comparison covering physical properties, climate performance, real-world applications, pros and cons, and a clear selection framework — everything you need to make the right procurement decision.
At a Glance: The Two Grades
ASTM D946 / EN 12591
Bitumen 60/70
ASTM D946 / EN 12591
Bitumen 80/100
Full Technical Specification Comparison
| Property | Test Method | Bitumen 60/70 | Bitumen 80/100 |
|---|---|---|---|
| Penetration at 25°C (0.1 mm) | ASTM D5 / EN 1426 | 60–70 | 80–100 |
| Softening Point (°C) | ASTM D36 / EN 1427 | 49–56 | 42–50 |
| Ductility at 25°C (cm) | ASTM D113 | ≥ 100 | ≥ 100 |
| Loss on Heating (%) | ASTM D6 | ≤ 0.2 | ≤ 0.2 |
| Drop in Penetration after Heating (%) | ASTM D6 | ≤ 20 | ≤ 20 |
| Solubility in CS₂ (%) | ASTM D4 | ≥ 99.5 | ≥ 99.5 |
| Flash Point (Cleveland Open Cup, °C) | ASTM D92 | ≥ 250 | ≥ 250 |
| Specific Gravity at 25°C | ASTM D70 | 1.01–1.06 | 1.01–1.06 |
| Kinematic Viscosity at 135°C (cSt) | ASTM D2170 | Higher | Lower |
Key Differences: Bitumen 60/70 vs 80/100
| Factor | Bitumen 60/70 | Bitumen 80/100 |
|---|---|---|
| Hardness | Harder ✓ Hot Climates | Softer |
| Hot Climate Performance | Excellent — resists rutting | Moderate — softens at lower temp |
| Cold Climate Performance | Less flexible, risk of cracking | Better flexibility ✓ Cold Climates |
| Workability & Ease of Application | Requires higher mix temperature | Easier to work at lower temps |
| Traffic Load Suitability | Heavy traffic — highways, airports | Light-to-medium traffic |
| Resistance to Deformation (Rutting) | Superior | Moderate |
| Resistance to Thermal Cracking | Moderate | Better |
| Aging Resistance | Higher durability over time | Faster oxidative aging |
| Typical Applications | Highways, airports, industrial roads | Rural roads, roofing, cold-mix |
| Price | Slightly higher per ton | More economical |
Applications: Where Each Grade Performs Best
60Bitumen 60/70 Applications
- High-traffic highways and motorways
- Airport taxiways and runways
- Industrial and port access roads
- Bridge deck waterproofing (hot climate)
- Roofing felt and waterproof membranes
- Industrial floor coatings and insulation
- Asphalt mix in tropical and arid regions
80Bitumen 80/100 Applications
- Rural and secondary roads in cold regions
- Cold-mix asphalt and patch repairs
- Spray sealing and chip sealing
- Bitumen emulsion production
- Waterproofing in temperate climates
- Low-traffic residential streets
- Drainage works and ditch lining
Climate Performance: Choosing by Temperature Zone
Climate is arguably the single most important factor when selecting between these two grades. The softening point — the temperature at which bitumen loses rigidity — determines how the material behaves under real-world heat conditions.
Bitumen 60/70 in Hot Climates
With a softening point of 49–56°C, Bitumen 60/70 remains structurally stable in countries experiencing sustained pavement temperatures above 50°C (common in the Middle East, South Asia, and sub-Saharan Africa). It resists the flow and deformation that causes rutting in heavy-traffic conditions, making it the dominant choice for major road contracts in these regions.
Bitumen 80/100 in Cold Climates
In northern Europe, highland regions, or anywhere pavement temperatures routinely drop below −10°C, the softer 80/100 grade provides greater low-temperature flexibility. Harder grades can become brittle and crack under thermal stress, while 80/100 absorbs the contraction and expansion cycles of cold weather with less risk of surface fracturing.
Pros & Cons in Road Construction
✔ Bitumen 60/70 Advantages
- Superior rut resistance under heavy loads
- Better durability and longer service life
- Higher stability in hot, arid conditions
- Preferred grade for international tenders
✘ Bitumen 60/70 Limitations
- Higher mixing temperature required
- Less flexible in cold weather
- Slightly more expensive per ton
✔ Bitumen 80/100 Advantages
- Easier to apply at lower temperatures
- Better resistance to thermal cracking
- More economical — lower cost per ton
- Excellent for emulsion production
✘ Bitumen 80/100 Limitations
- Softer — prone to rutting in heat
- Faster oxidative aging
- Not suitable for heavy-traffic highways
Which Grade Should You Choose?
🔍 Selection Guide
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Frequently Asked Questions
Request a Quote for Bitumen 60/70 or 80/100
Zumrut International Kimya exports both grades FOB Iskenderun and Mersin ports. Competitive pricing, full documentation, and reliable supply from Turkey to global markets.
