Description of Oxidized Bitumen 85/40
Oxidized bitumen 85/40, also known as blown bitumen, is a semi-solid grade of petroleum bitumen that is produced by air-blowing asphalt flux, which is usually obtained from the process of oxidizing asphalt 60/70 with hot air. Its unique physical properties make it highly versatile for various applications in the construction industry.
The grade numbers 85/40 indicate the penetration value and softening point of the material. The softening point in degrees Celsius by the (Ring and Ball method) according to ASTM D36 and the penetration value in 1/10 mm by (ASTM D5 or IP49) defines its characteristics.
Blown bitumen 85/40 is strictly under quality control, which involves testing every batch and checking prior to shipment for the purpose of assuring uniformity in the quality and quantity of goods. Compared to viscosity- and penetration-grade bitumen, oxidized bitumen possesses a higher softening point, which makes it more resistant to temperature variations and perfect for demanding applications.
Uses of Oxidized Bitumen 85/40
The main field of application of oxidized bitumen 85/40 is in the industrial field, especially in paints, mastics, flooring, pipe coating, and roof insulation. It is classified according to its penetration rates and softening points. This bitumen is applied in the production of roofing and isolation membrane sheets and for sealing and insulating buildings.
In various industries, like chemical, construction, road paving, textile processing, and civil works, 85/40 is used as an adhesive, crack sealant, dust-binding agent, and additive for construction materials. It is also used in the production of rubber, plastic products, and asphalt-based paints for corrosion protection. It is also a base for synthetic turf, electrical laminates, and hydraulic applications.
Bitumen 85/40 is very adaptable due to its resistance to heat and finds perfect application in pipe coatings, roofing, and the manufacture of paints at very hot weather conditions.
Advantages of Oxidized Bitumen 85/40
Oxidized Bitumen 85/40 is a high-purity, non-toxic, and flexible material that conforms to ASTM standards for softening point and penetration. It offers excellent adhesive, low water absorption, and is chemically stable. It is highly resistant to soil, cold, and electrical stress. The product is available in various packaging options, including meltable bags, Kraft bags, carton boxes, blocks, kegs, and drums. It has a high monthly capacity for production and provides full coverage and support.
Storage and Handling of Bitumen 85/40
Oxidized bitumen has 10 years of validity with multi-time heating and cooling. Please refer to MSDS for more information.
Health & safety of blown asphalt 85/40
Usually heated and melted in on-site boilers, packaged bitumen is an essential step in final applications. For the sake of product quality, safety, and health, control throughout the heating process is crucial. Aggressive heating can result in thermal cracking and localized overheating, and the maximum safe handling temperature is 230 C. It is not advisable to reheat melted bitumen from cold in the boiler since this may cause low flash vapors and overheating. Because bitumen has a low thermal conductivity, it is essential that temperature monitoring or control devices be placed properly.
Packing
• Meltable Polyamide Bags (20KG) (25 Kg)
• Carton Box (20KG) (25 Kg) (40kg)
• Kraft Bags (20KG) (25 Kg) (40kg)
• Blocks (20KG) (25 Kg) (40kg)
• Drums (20KG) (25 Kg)
Other kinds of packing and Size are welcome from clients.
Specification
| Oxidized Bitumen 85/40 | Specification | Test Method |
|---|---|---|
| Specific gravity@25/25 ˚C | 1.05 approx | D-70 |
| Penetration@25 ˚C | 35-45 | D-5 |
| Softening point ˚C | 80-90 | D-36 |
| Ductility@25 ˚C | 3 | D-113 |
| Loss on heating (wt)% | 0.5 | D-6 |
| Flash point ˚C | 230 min | D-92 |
| Solubility in CS2 (wt)% | 99 min | D-4 |
