Blown Bitumen 85/40 is Semi Solid grade of pure petroleum bitumen manufactured by air-blowing through an asphalt flux. Special physical properties of its grade can be used in different applications in the construction business. Blown bitumen 85/40 is based on petroleum bitumen which is made by blowing bitumen 60/70 by very hot air. The numbers relate to the midpoint of the material’s softening point and penetration respectively. The softening point value is the degrees Centigrade measured by the Ring and Ball method as determined by ASTM D36. The penetration value is in 1/10 mm as determined by IP49 or ASTM D5.
Oxidized Bitumen 85/40 is a solid or semi-black solid material and gradually liquid when heated. Oxidized Bitumen grades are blown or oxidized Asphalt ‘s which are produced by passing air through soft bitumen under controlled temperature conditions. This process gives the bitumen more rubbery properties than penetration or hard grade bitumens and a variety of uses in industrial applications.
Uses of Oxidized Bitumen 85/40
Oxidized bitumen 85/40 is used in the chemical, fuel, paints, lacquers, varnishes, paper-pulp-board, textile processing, road construction, pavement, crack seals and repairs, civil works, roofing, construction industries; sealing and insulating buildings, adhesive, construction materials additive, dust-binding, insulating and impregnating agent, and also to manufacture rubber and plastic products. Oxidized bitumen 85/40 products are also used in asphalt-based paints for corrosion protection of metals, in lining public works structures, adhesives in electrical laminates, base for synthetic turf.
Typical uses for oxidized bitumen 85/40 are for water-proof application and corrosion resistance for pipe coating, Portland cement pavement, hydraulic applications, paint manufacturing, caulking, mastic, and damp proofing. This grade of bitumen can be used for insulation and isolation in bitumen membrane sheets. It is also used in the automobile industry for car undercoating as it is proven to be an excellent water-proofing, dust proofing and also noise proofing material.
- Insulating and impregnating agent
- Various industrial uses
- Sealing of expansion joints.
- Repair of joints or cracks.
- Construction materials additive
- Fixation of parquet floors.
- Adhesive to be used in thermal insulation.
- Paint paper-pulp-board
- Repair of unexposed cracks.
- Bonding of wet briquettes.
- Make rubber and plastic products
- Use as sealing of electrical junction boxes
- Isolation bitumen membrane sheet
Modifying of bitumen 85/40
Europe manufactures bitumens and polymer modified bitumens for asphalts to three standards, covering penetration and viscosity grade bitumens, covering hard paving grade bitumens, covering polymer modified bitumens (pmbs). Covering hard industrial oxidized bitumens 85/40 and covering oxidized bitumen for industrial use 85/40 are the specifications for bitumen for use in industry. The key feature of all of these specifications is the combination of penetration and softening point and, in the case of the soft bitumen grades, viscosity. Generally, these properties are used to determine the bitumen grade required by the buyer. The cut-back and fluxed bitumens are bitumens that have been blended with more or less volatile hydrocarbon components (fuels), primarily kerosene. They are characterised by a viscosity specification, EN 15322:2013 (BSI, 2013) providing the framework for such products. While such products remain popular in some parts of the world.
Packing of Oxidized Bitumen 85/40
- 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)
Oxidized bitumen 85/40 quality
The quality of bitumens over many years has been investigated by Shell to determine the connection between laboratory measured properties and their performance in asphalt on the road. Asphalts have become more difficult to predict as traffic loads have increased and performance requirements have increased. In addition to the design and nature of the application, the quality of the individual components can influence performance on the road. In terms of volumetric content, oxidized bitumen 85/40 is a relatively minor component of asphalt, but it plays a crucial role – it is both the asphalt’s durable binder and gives it visco-elastic properties. In general, a bitumen’s performance on the road can be ensured if four properties are controlled: Rheology, Cohesion, Adhesion, Durability.
Technical Advantages of Oxidized Bitumen 85/40
- Durability
- Flexibility
- Water Resistant
- Chemical Stability
Compared to paving grade bitumen:
- Reduced temperature susceptibility
- Exhibits a more ‘solid’ nature at ambient temperatures
- High penetration index
Specifications of oxidized bitumen 85/40
| Bitumen 85/40 | Test method | Unit | Specification |
|---|---|---|---|
| Specific gravity @25/25°C | ASTM D70 | (kg/m³) | 1.05 approx. |
| Penetration @25°C | ASTM D5 | mm/10 | 35/40 |
| Softening point | ASTM D36 | °C | 80/90 |
| Ductility @25°C | ASTM D113 | cm | 3 min |
| Loss on heating | ASTM D6 | Wt. % | 0.2 max |
| Flashpoint | ASTM D92 | °C | 260 min |
| Solubility in CS2 | ASTM D4 | Wt. % | 99 max |
| Spot test | AASHOT102 | --- | Negative |
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