What Is Bitumen 80/100? Properties, Applications and Specifications
What is Bitumen 80/100?
Bitumen 80/100 is a penetration grade bitumen commonly used in asphalt production, road construction, flexible pavements, urban roads, and selected maintenance projects. The number 80/100 refers to the penetration range measured by a standard needle test under defined laboratory conditions.
Compared with bitumen 60/70, bitumen 80/100 is softer and generally provides greater flexibility. However, the right grade should always be selected based on climate, traffic load, pavement design, asphalt mix requirements, and project specifications.
Bitumen 80/100 belongs to the penetration grade bitumen category. In this grading system, the penetration value indicates the relative hardness or softness of bitumen. A higher penetration value generally means softer bitumen, while a lower penetration value indicates harder bitumen.
This means bitumen 80/100 is softer than bitumen 60/70 and significantly softer than bitumen 40/60. Its higher flexibility can make it suitable for certain pavement designs, moderate traffic conditions, and cooler climate applications.
This article explains bitumen 80/100 properties, technical specifications, testing standards, applications, price factors, and its differences from bitumen 60/70 and other penetration grades.
Bitumen 80/100 Quick Facts
| Property |
Value / Description |
| Grade |
80/100 |
| Type |
Penetration Grade Bitumen |
| Penetration Range |
80–100 dmm |
| Relative Consistency |
Softer than 60/70 and 40/60 |
| Common Applications |
Asphalt production, road construction, flexible pavements, urban roads |
| Main Test Standard |
ASTM D5 / AASHTO M20 |
What Does 80/100 Mean in Bitumen?
The term 80/100 refers to the penetration range of the bitumen. Penetration is measured by allowing a standard needle to penetrate into a bitumen sample under controlled temperature, load, and time conditions.
In penetration grading, lower numbers represent harder bitumen and higher numbers represent softer bitumen. Therefore, bitumen 80/100 has a softer consistency compared with bitumen 60/70 and bitumen 40/60.
This softer consistency can improve workability and flexibility in certain applications, but it may not be suitable for every road construction project, especially where high temperature and heavy traffic require higher resistance to deformation.
Bitumen 80/100 Specifications
The technical quality of bitumen 80/100 should be evaluated through laboratory test results, Certificate of Analysis, and project specifications. Typical test parameters include penetration, softening point, ductility, flash point, and solubility.
| Test |
Standard |
Typical Range / Requirement |
| Penetration |
ASTM D5 |
80–100 dmm |
| Softening Point |
ASTM D36 |
Typically around 42–52°C |
| Ductility |
ASTM D113 |
Often specified as more than 100 cm |
| Flash Point |
ASTM D92 |
Commonly above 230°C |
| Solubility |
ASTM D2042 |
Commonly above 99% |
Important Technical Note
The values above are general reference ranges. Final acceptance should always be based on the buyer’s project specification, latest Certificate of Analysis, and applicable technical standard.
How Is Bitumen 80/100 Produced?
Bitumen 80/100 is produced from petroleum refining streams, usually from vacuum residue or other heavy fractions of crude oil refining. The final properties of the product depend on feedstock quality, refining conditions, production control, and laboratory verification.
During production, the material must be controlled to meet the required penetration range and other technical specifications. Quality control is therefore essential to ensure that the product is not only labeled as 80/100, but also performs within the expected technical range.
For B2B buyers, production consistency is important because two products with the same grade name may perform differently if their laboratory results, feedstock quality, or production stability are not comparable.
Applications of Bitumen 80/100
Bitumen 80/100 is generally considered when a softer penetration grade with higher flexibility is required. Its suitability depends on climate, traffic load, pavement structure, asphalt mix design, and project specifications.
1. Road Construction
Bitumen 80/100 may be used in road construction projects where a softer binder is suitable for the design conditions. It can be considered for selected roads, moderate traffic conditions, and projects where flexibility is more important than very high stiffness.
2. Asphalt Production
In asphalt production, bitumen 80/100 can be used where the asphalt mix design requires a softer penetration grade. Its workability may support mixing and compaction under suitable temperature and project conditions.
3. Flexible Pavements
Because bitumen 80/100 has higher penetration and greater flexibility than harder grades, it may be suitable for certain flexible pavement designs. However, it should be used only when its performance matches the expected traffic and temperature conditions.
4. Urban Roads and Maintenance Projects
Bitumen 80/100 may also be considered for urban roads, repair works, and selected maintenance projects depending on local specifications and environmental conditions. Its use should always be checked against the project’s technical requirements.
Bitumen 80/100 vs Bitumen 60/70
Bitumen 80/100 and bitumen 60/70 are both penetration grade bitumens, but they differ in consistency, flexibility, and common application conditions. The main difference is their penetration range.
| Property |
Bitumen 60/70 |
Bitumen 80/100 |
| Penetration Range |
60–70 dmm |
80–100 dmm |
| Relative Hardness |
Harder |
Softer |
| Flexibility |
Balanced |
Higher |
| Climate Suitability |
Moderate to warmer conditions |
Cooler or specific flexible pavement conditions |
| Common Use |
General road construction and asphalt production |
Selected asphalt, urban roads, and moderate traffic applications |
In simple terms, bitumen 80/100 is softer and more flexible than bitumen 60/70. For many conventional road construction projects, bitumen 60/70 is often selected because of its balanced performance. Bitumen 80/100 should be selected when project conditions require a softer binder and its performance is technically justified.
Advantages of Bitumen 80/100
Bitumen 80/100 can offer several advantages when used in the right project conditions. These advantages should always be evaluated together with technical specifications and pavement design requirements.
- Higher flexibility compared with harder penetration grades
- Suitable workability in selected asphalt applications
- Useful for certain moderate or cooler climate conditions
- Applicable in selected flexible pavement designs
- Can be cost-effective when it matches the project specification
Important Application Note
Bitumen 80/100 is not automatically better because it is softer. In high-temperature or heavy-traffic conditions, harder grades such as bitumen 60/70 or bitumen 40/60 may be more suitable depending on pavement design.
Factors Affecting Bitumen 80/100 Price
The price of bitumen 80/100 is influenced by multiple technical and commercial factors. Buyers should evaluate quotations based on both price and technical specifications rather than considering price alone.
- Feedstock and crude oil conditions
- Production quality and laboratory control
- Packaging type (Bulk, Drum, Jumbo Bag)
- Order volume
- Transportation and delivery location
- Commercial and payment terms
- Required technical documentation
To understand how these factors influence market pricing, read our detailed guide: Bitumen Price in Iran.
How to Select the Right Bitumen Grade?
Selecting the correct bitumen grade should be based on technical requirements rather than simply choosing the cheapest option. Climate conditions, traffic loading, pavement design, and project specifications should all be considered.
| Project Condition |
Commonly Considered Grade |
| Hot climate and heavy traffic |
Bitumen 40/60 |
| General road construction |
Bitumen 60/70 |
| Cooler climates and selected flexible pavements |
Bitumen 80/100 |
For a complete comparison, see: Difference Between 40/60, 60/70 and 80/100 Bitumen.
Frequently Asked Questions
What is Bitumen 80/100?
Bitumen 80/100 is a penetration grade bitumen with a penetration range between 80 and 100 dmm. It is softer than bitumen 60/70 and is commonly used in selected asphalt and road construction applications.
What is the penetration range of Bitumen 80/100?
The penetration range of Bitumen 80/100 is between 80 and 100 dmm according to ASTM D5 testing procedures.
Is Bitumen 80/100 softer than Bitumen 60/70?
Yes. Bitumen 80/100 has a higher penetration range and therefore is generally softer and more flexible than Bitumen 60/70.
What are the main applications of Bitumen 80/100?
Bitumen 80/100 is used in asphalt production, road construction, flexible pavements, urban roads, and selected maintenance projects.
What standards apply to Bitumen 80/100?
Common standards include ASTM D5, ASTM D36, ASTM D113, ASTM D92, and AASHTO M20.
What affects Bitumen 80/100 price?
Feedstock, packaging, transportation, order quantity, quality control, and commercial terms can all affect Bitumen 80/100 pricing.
How should Bitumen 80/100 be stored?
Bitumen should be stored under controlled conditions using appropriate tanks, heating systems, and handling procedures according to industrial best practices.
Technical Review
This article was prepared based on internationally recognized asphalt binder standards, penetration grading systems, laboratory quality-control practices, and industry references commonly used in road construction and bitumen specification evaluation.
Conclusion
Bitumen 80/100 is a penetration grade bitumen characterized by higher penetration values and greater flexibility compared with harder grades such as Bitumen 60/70 and Bitumen 40/60.
Its suitability depends on climate conditions, pavement design, traffic loading, asphalt mix requirements, and project specifications. Selecting the right bitumen grade should always be based on technical performance requirements rather than price alone.
Professional buyers should evaluate Bitumen 80/100 using technical specifications, laboratory results, quality documentation, delivery conditions, and supplier reliability to ensure long-term project performance.
References