Description of Oxidized Bitumen 85/40
Oxidized Bitumen 85/40, or Blown Bitumen, is produced by blowing hot air into penetration-grade bitumen under controlled conditions. It becomes harder and more viscous as a result of this transformation, demonstrating superior performance under heat and pressure. The name 85/40 indicates the softening point (85°C) and penetration value (40 dmm) of the material, quantifying its thermal stability and stiffness.
Uses of Blown Asphalt 85/40
Because of its unique characteristics, Blown Asphalt 85/40 is widely used in roofing, waterproofing, road pavements, and industrial applications. It is used in roofing to produce bitumen membranes and protective coatings. In waterproofing, it is used on foundations and damp areas to prevent water from penetrating through.
In road construction, it enhances paving mix strength and hardness with extended use. It’s also utilized in sealant, adhesive, and composite building material production.
Application of Oxidized Asphalt 85/40
It is utilized in its melted state and requires surface preparation. It’s largely applied in multilayer systems in industrial or waterproofing applications as a binder. As a result of high adhesion and resistance, it’s suitable for long-term installation on horizontal as well as vertical surfaces.
Properties of Oxidized Bitumen 85/40
This grade has high softening point, low penetration value, and thermal stability. High-temperature performance is assured, and it may be employed under harsh conditions. Improved elasticity increases the resistance of the material to cracking from load or temperature change, while high softening point ensures that the material maintains its shape under hot temperatures.
Advantages of Oxidized Bitumen 85/40
Oxidized Bitumen 85/40 possesses several benefits such as purity, better adhesion, chemical stability, and flexibility. It is impact and weather resistant, possessing high performance in cold and hot conditions. It is ASTM standard and competitively priced. In addition, it comes with third-party inspection, fast delivery, and packaging options, making it a reliable choice contractor and industry individuals can rely on.
How to Apply Oxidized Bitumen 85/40?
Before application, the bitumen should be heated to twice its softening point to acquire free flow and adhesion. The surfaces should be clean and dry to acquire optimum adhesion. Equipments for handling and heating should be adequate for safe and effective utilization.
Handling & Storage
Handling:
Put on protective attire (gloves, goggles, protective gear) at all times
Use recommended temperatures for heating to avoid hazards
Employ adequate equipment like bitumen pumps and hoses
Ensure good ventilation in areas of work
Instruct staff on handling and safety methods
Storage:
Keep in a dry, cool area, out of sunlight
Use tightly closed, labeled containers to prevent contamination
Away from highly flammable materials
Use FIFO (first-in, first-out) practice to maintain freshness
Check containers periodically for leakage or damage
Comparisons with Other Bitumen Grades
In regards to softer grades like 60/70, Oxidized Bitumen 85/40 is harder and thicker, hence more appropriate for heavy applications. It is slightly softer than 90/40 but offers greater flexibility with good mechanical and thermal characteristics.
Safety
Oxidized bitumen is treated gently due to the high temperature involved. Labour must be trained on safety practices and use of the right equipment. While not highly flammable, it must be kept away from heat sources. Environmental issues and recyclability of bituminous products are being enhanced.
Packing of Oxidized Bitumen 85/40
Oxidized Bitumen 85/40 is packed in the following manner on a regular basis:
Meltable Polyamide Bags: 20 kg / 25 kg (can be melted in boilers directly)
Carton Boxes: 20 kg / 25 kg / 40 kg (with non-stick inner lining)
Kraft Paper Bags : 20 kg / 25 kg / 40 kg (strong and eco-friendly)
Blocks : 20 kg / 25 kg / 40 kg (solid blocks for mass storage)
Drums : 20 kg / 25 kg (for mass transportation)
Technical Data sheet of oxidized bitumen 85/40
| BITUMEN 85/40 | TEST METHOD | UNIT | SPECIFICATION |
|---|---|---|---|
| Specific gravity @ 25/25 °c | ASTM D70 | Kg/cm³ | 1.05 approx |
| Penetration @ 25°c | ASTM D5 | mm/10 | 35-40 |
| Softening point °c | ASTM D36 | °C | 80-90 |
| Ductility @ 25°c | ASTM D113 | cm | 3 min |
| Loss on heating(wt) % | ASTM D6 | wt % | 0.2 max |
| Flashpoint °c | ASTM D92 | °C | 260 min |
| Solubility is CS2(wt) % | ASTM D4 | wt % | 99 max |
| Spot test | A.a.s.h.o.t102 | - | Negative |
