Bitumen 30/40 or pen grade bitumen is a petroleum binder that is widely utilized in various construction applications. It is primarily graded based on its penetration value (30-40 tenths of a millimeter) and softening point, which are the measures of the consistency, hardness, and thermoplasticity of the material.
What Is Bitumen 30/40?
Bitumen 30/40 is a semi-solid, paving-grade, medium-hardness bitumen. Its penetration value is the thickness that a typical needle will penetrate the bitumen at 25°C under specified conditions. Bitumen 30/40 is appropriate for application in road construction in warm to hot climates because it possesses an optimal combination of strength and flexibility.
Produced by the fractional distillation of crude, Bitumen 30/40 consists of high-molecular-weight hydrocarbons and can be strengthened with additives for performance.
Key Properties of Bitumen 30/40
Penetration: 30–40 (1/10 mm) – Indicates medium hardness.
Viscosity: Offers adequate workability and flow during mixing.
Adhesion: Firm bonding between aggregates enhances road longevity.
Elasticity: Elongates and shortens with temperature, preventing cracking.
Durability: Offers resistance to heavy traffic deformation.
Bitumen 30/40 Uses
Bitumen 30/40 is a general-purpose and general penetration-grade bitumen primarily utilized in the construction sector and infrastructure. Its optimum hardness and flexibility make it especially worthwhile for road construction, where it functions as a binder in HMA.
In this capacity, Bitumen 30/40 provides the bond between aggregate particles that will allow the asphalt mixture to withstand traffic load stresses, heat expansion, and contraction. It is used in base, binder, and surface courses of roads and highways, particularly where the weather is moderate to hot and severe low-temperature cracking is not an issue.
Apart from new road construction, Bitumen 30/40 is also used in pavement preservation and maintenance works. Chip sealing, slurry sealing, and crack sealing are some of the processes where Bitumen 30/40 is applied to extend the life of pavement. These techniques seal up small cracks, prevent water infiltration, and restore skid resistance, thereby delaying costly rehabilitation.
Bitumen 30/40 in roofing is used in the production of waterproofing membranes and protective coatings for flat or low-sloped roofs. Because it is both water and UV resistant, and because it is long lasting, it is a reliable material with which to weatherproof buildings.
Secondly, Bitumen 30/40 also has applications in various industrial uses. It is also used in making adhesives, sealants, pipe coatings, and weather-resistant linings due to its strong adhesive nature as well as weather resistance. These industrial uses further solidify the versatility and importance of the material among different industries.
Briefly, Bitumen 30/40 is not only one of the key road construction ingredients but also essential to maintenance and waterproofing, as well as industrial production—so it is one of the most relied-upon materials in modern infrastructure.
Safety Precautions
In order to enable safe handling of Bitumen 30/40:
Ventilation: Provide suitable airflow to reduce fume inhalation.
PPE: Use heat-resistant gloves, goggles, long sleeves, and boots.
Fire Safety: Prevent open flames; keep extinguishers handy.
Must prevent contaminants and degradation.
Conclusion
Bitumen 30/40 remains a fundamental product today in infrastructure due to the fact that it possesses the perfect blend of hardness, flexibility, and performance. In roads, airport runways, or roofs, the quality and correct use are essential to ensure it is cost-saving and long-lasting.
Packing of Bitumen 30/40
- 1 MT Jumbo Bag with a steel cage and pallet: Loading 20 MT in 20 ft Container
- 1 MT Jumbo Bag without cage and pallet: Loading 20 MT in 40 ft Container
- 1300 Kg Jumbo Bag: Loading 26 MT in 40 ft Container
- 180kg New Steel Drum: Loading 110 Drum in 20 ft
- 375Kg Bitubag: Loading 24 MT in 20 ft Container
- Bulk in vessel: Loading 2000 to 20,000 MT in Bitumen Carrier
- Bulk in Flexi Bag: Loading 20 MT in Bitumen Felexi Bag
- Bulk in Tunker: Loading 25 MT in Truk Tanker
Specification of Bitumen Penetration 30/40
Bitumen 30/40 | Test method | Unit | Specification |
---|---|---|---|
Specific gravity @ 25°c | ASTM D70 | Kg/cm3 | 1.01/1.06 |
Penetration @ 25°c | ASTM D5 | mm/10 | 30/40 |
Softening point °c | ASTM D36 | °C | 55/63 |
Ductility @25 °c | ASTM D113 | cm | 100 min |
Loss on heating(wt) % | ASTM D6 | wt % | 0.2 max |
Drop in penetration after heating % | ASTM D5-D6 | % | 20 max |
Flash point °c | ASTM D92 | °C | 250 min |
Solubility is CS2(wt) % | ASTM D4 | wt % | 99.5 min |
Spot test | A.A.S.H.O.T102 | _____ | Negative |