Definition of Oxidized Bitumen 85/25
Oxidized Bitumen 85/25 is a semi-solid oxidized form of pure petroleum bitumen and is categorized among polycyclic aromatic hydrocarbons. It is produced by blowing air into Bitumen 60/70 with high heat.
Blown Bitumen 85/25 undergoes an oxidation process where air is blown into the bitumen, and it reacts with oxygen. The reaction produces a harder, water-resistant, and adhesive product.
Explanation of the 85/25 Specification
85: Refers to softening point in degrees Celsius, i.e., the temperature at which bitumen starts to soften and lose its solid character.
25: Refers to penetration grade, i.e., the depth (in tenths of a millimeter) to which a standard needle penetrates the bitumen under certain conditions.
Alternative Names for Oxidized Bitumen 85/25
Oxidized Bitumen 85/25 can also be known as:Blown Asphalt 85/25,Blown Bitumen 85/25,Oxidizing Bitumen 85/25,Oxidized Asphalt 85/25,Air Blown Asphalt 85/25,Air-Rectified Bitumen 85/25
Use of Oxidized Bitumen 85/25
Oxidized Bitumen 85/25 has extensive uses in:
Roofing, insulation, and bitumen membrane sheets
Chemical processes like paints, lacquers, varnishes, and adhesives
Paper and pulp processing, board, and textiles
Road construction, pavement, crack sealant, and maintenance
Civil engineering works and materials
Sealing and insulating buildings
Dust-binding and coating applications
Rubber and plastic goods manufacture
Used in the manufacturing of asphalt-based paints for corrosion protection of metals, electrical laminates adhesives, synthetic turf base, pipe coating, Portland cement pavement, hydraulic uses, and paint production.
Application Details of Oxidized Bitumen 85/25
This bitumen grade finds application in various industries as an untapped raw material for:
Bitumen coatings
Lacquers and varnishes
Treatment of paper and textiles
Road and civil construction, including crack sealing and repairs
Pipe coating
Sealing and roofing
Additives in building materials
Insulating and impregnating agents
Manufacture of rubber and plastic products
R 85/25 is particularly valued in paint manufacture and coatings used in hot weather.
Health & Safety Precautions for Oxidized Bitumen 85/25
Operators of oxidized bitumen should adhere to these safety precautions:
Laborers working with oxidized bitumen should adhere to these safety precautions:
Ventilation: Well-ventilated work areas are necessary to avoid the inhalation of poisonous fumes released when bitumen is burned.
Protective Equipment: Use heat-resistant gloves, boots, long-sleeved shirts, long trousers, and protective eyewear.
Fire Protection: Prevent bitumen exposure to open fire or sparks and maintain fire extinguishing equipment close at hand due to the high working temperatures.
Packaging of Oxidized Bitumen 85/25
Oxidized Bitumen is available in various packings of the following forms:
Meltable Polyamide Bags (20 & 25 kg)
Carton Boxes (20, 25 & 40 kg)
Kraft Bags (20, 25 & 40 kg)
Blocks (20, 25 & 40 kg)
Drums (20 & 25 kg)
Specification of Oxidized Bitumen 85/25
| Oxidized Bitumen 85/25 | Specification | Test method ASTM/EN13304 |
|---|---|---|
| Specific gravity @ 25/25 cg | 1.01/1.06 | D-70 |
| Penetration @ 25 c | 20/30 | D-5 |
| Softening point c | 80/90 | D-36 |
| Loss on heating(wt) % | 0.2 Max | D-6 |
| Flash point c | 250 min | D-92 |
| Solubility is CS2(wt) % | 99.5 Max | D-4 |
| Spot test | negative | ____________________ |
