General definition of Bitumen 40/50
Bitumen penetration grade 40/50 is a semi-hard penetration grade bitumen used in road construction and repair. Its unique temperature-viscosity relationship is crucial for determining performance parameters like adhesion, rheology, durability, and application temperatures. This standard Penetration Grade of Bitumen ASTM D946M is suitable for road construction and producing superior asphalt pavements, particularly in road and airport constructions.
Blown Asphalt 40/50 has a penetration between 40-50 desi-millimeters and a softening point between 52-60C. It has a thermoplastic property similar to synthetic resin material, which softens with heating and hardens when cooled. This grade has a strong viscosity compared to other grades. It is mainly used in the manufacture of hot mix asphalt for bases and wearing courses. The production process is automated, resulting in a constant and homogeneous finished product quality. Penetration Grade Bitumen can be used in various applications. supplied in any grade and are designated by two numbers to indicate the mid-points of their penetration ranges.
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How is 40/50 Bitumen Produced?
40/50 bitumen is produced by refining crude oil through fractional distillation, heating and separating it into different fractions based on boiling points. The heaviest fraction is obtained, which is then processed to meet specific specifications.
To produce penetration bitumen 40/50, it undergoes tests to determine its penetration value, which indicates its hardness. The penetration value ranges between 40 and 50 Deci millimeters, and Asphalt Cement has a penetration value between 40 and 50 Deci millimeters, hence its name.
Application of Bitumen grade 40/50
This grade of bitumen is also mainly used in the manufacture of hot mix asphalt. also, Bitumen is suitable for road construction and repair for asphalt pavements with superior properties. Bitumen is used for hot mixed asphalt because of the properties of very strong viscosity compared to other grades. Also used in specialized applications like airport runways and also in very heavy traffic volume roads in coastal cities in the country.
Bitumen 40/50 Advantages
Bitumen Penetration 40/50 is a thermoplastic material, which means that when it is subjected to high temperatures, it will become more flexible, and when it is exposed to cold temperatures, it will become more rigid. The kind of crude oil that is refined into bitumen as well as the refining process itself are both potential factors that might have an effect on the manner in which bitumen behaves in terms of temperature and stiffness. Maintaining equilibrium in the surrounding environment. A lifespan that is much longer than the typical one for the product. Extraordinarily strong adhesion to the great majority of different kinds of materials in their diverse forms.
Handling and Storage
Handling: Skin contact with the product should be avoided. Inhalation of fumes should be avoided as far as is
reasonably practicable.
If the formation of vapors is a risk, then additional ventilation should be provided. Handle away from
sources of ignition and heat. Do not smoke, eat or drink during use.
Storage: No special requirements. Asphalt is normally used upon receipt.
Refer to the relevant Technical Data Sheet for the specific product.
Guaranty of bitumen 40/50
Quality of bitumen penetration grade with the arrangement of the international inspector to check the quality and quantity of the bitumen penetration grade during the loading to the vessel and control the production by QC by batch test report before shipping.
Packing
Bitumen grade is commonly packed in new steel drums, 150, 180 & 220 Kg barrels and Jumbo Bags or Bitubag and 10 & 20kg Tubular cartons.
Specification
| Bitumen 40/50 | Test method | Unit | Specification |
|---|---|---|---|
| Specific gravity @ 25°c | ASTM D70 | Kg/cm3 | 1.01/1.06 |
| Penetration @ 25°c | ASTM D5 | mm/10 | 40/50 |
| Softening point °c | ASTM D36 | °C | 52/60 |
| 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 |
FAQs
Why is Bitumen 40/50 suitable for heavy-duty use?
Bitumen 40/50 is noted for high softening point and high viscosity, hence highly resistant to deformation and stable at high temperatures and heavy traffic loads, hence appropriate for high-stress applications such as highways and inner urban roads.
How should Bitumen 40/50 be stored?
Bitumen 40/50 should be kept in a dry, cooler, and ventilated place not to expose it to water, temperature, or light. It should be stored in sealed containers to safeguard it against deterioration and contamination.
What is the performance of Bitumen 40/50 under different climatic conditions?
Bitumen 40/50 is also used in hot or tropical climatic conditions where high deformation resistance and softening point are required. Due to its characteristics, it is more suitable for its use in hot-mix asphalt under a tropical climate.
Is Bitumen 40/50 eco-friendly?
Like any other petroleum-derived bitumen products, Bitumen 40/50 also needs to be disposed of carefully and handled carefully to avoid any form of damage to the environment. Proper safety measures should be taken when disposing of, applying, and storing it to counteract any probable damage to the environment.
What are the necessary protective measures to take while working with Bitumen 40/50?
Proper ventilation must be used to avoid skin contact and inhalation of the vapors. Proper personal protective equipment in the form of gloves, safety glasses, and respirators must be used to avoid skin contact and inhalation of the vapors.
Is Bitumen 40/50 usable for cold mix application?
Asphalt 40/50 is predominantly used for hot mix asphalt purpose. It is not suitable to be used in cold mix purpose because it has a higher viscosity, making it unsuitable for lower temperatures. A softer bitumen grade would typically be required in cold mix purpose.
