What is Oxidized Bitumen 85/40?
Oxidized bitumen 85/40, commonly referred to as blown bitumen, is a semi-solid petroleum bitumen grade produced by air-blowing asphalt flux. This flux is typically derived from oxidizing asphalt 60/70 with hot air.
Due to its distinctive physical properties, oxidized bitumen 85/40 has a wide applicability in numerous construction applications. The grade number, 85/40, gives the penetration value and softening point of the material. Its softening point is measured by the Ring and Ball method (ASTM D36), and the penetration value is given in 1/10 mm using ASTM D5 or IP49.
In the case of the quality and performance, each batch of blown bitumen 85/40 must undergo rigorous processes of quality control, including complete testing and inspection before shipping out. Oxidized bitumen, compared to viscosity or penetration-grade bitumen, is better suited to demanding applications since it has a higher softening point, which affords greater resistance to temperature variation.
Application of Oxidized Bitumen 85/40
Oxidized Bitumen 85/40 is an extremely adaptive industrially qualified product with its consistent performance in intense conditions. Both its penetration ratio and softening point are just the right properties for processes demanding both resistance and flexibility.
This grade is used widely in the manufacture of paints, mastics, floor coverings, pipe coatings, and roof insulation systems. It is a leading raw material in roofing and waterproof membrane sheet manufacturing, offering effective sealing and thermal protection for buildings and infrastructure.
In broader industrial usage, 85/40 functions as a binder, sealant, and protective agent in the construction, civil engineering, textiles, road work, and chemical processing industries. It is typically incorporated into rubber and plastic production, and finds application as a corrosion-resistant substrate for asphalt-based paints and coatings.
Because of its thermal resistance, Bitumen 85/40 is specifically suited for use in hot climates like pipe insulation, roof covering, and manufacture of paint for high-heat areas. Its reliability in high temperatures gives dependable protection and structural support for a number of industrial uses.
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
Care must be taken while handling and storing Bitumen 85/40 so that the material does not deteriorate and lose its performance and quality. Bitumen needs to be stored in a dry, clean condition, preferably in insulated tanks that can maintain the required temperature since Bitumen 85/40 is utilized most effectively when it is heated to its best operating temperature. It should be stored under cover from sunlight, rain, and extreme temperature fluctuations to prevent degradation. When handling bitumen, there must be employment of proper personal protective equipment such as gloves and goggles to ensure that all is safe since the material is hazardous when exposed to heat. It must also be employed with suitable equipment for heating that will ensure heating to the extreme points, thus minimizing product degradation. Regularly check the temperature and condition when stored to ensure that the bitumen’s integrity is maintained for it to function well in most applications, including paving, roofing, and insulation.
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.
Is Oxidized Bitumen 85/40 hazardous?
While it is not classified as highly hazardous, precautions should be taken during handling. Proper personal protective equipment (PPE), such as gloves and safety goggles, should be used to prevent burns or skin contact. Adequate ventilation is required to avoid inhaling fumes when heating.
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 |
Why Choose Oxidized Bitumen 85/40?
Oxidized Bitumen 85/40 is an ideal choice for roofing, flooring, and other industrial applications where stability and moderate heat resistance are required. With a softening point of around 85°C, it possesses good adhesion and external factor resistance. Its long lifespan, cost-effectiveness, and environmental friendliness in production make it an ideal choice for long-term construction and industrial use.
FAQs
How should Oxidized Bitumen 85/40 be stored?
Store it in a dry, well-ventilated area, away from direct sunlight, moisture, and heat sources to maintain its quality.
What are the advantages of using Oxidized Bitumen 85/40?
It offers high thermal stability, water resistance, and excellent adhesion, making it a reliable material for various industrial applications.
Is Oxidized Bitumen 85/40 environmentally friendly?
While it is not classified as hazardous, proper handling and disposal are essential to minimize environmental impact.
