Oxidized Bitumen 85/25 Description:
Oxidized Bitumen 85/25 is a semi-solid oxidized grade of pure petroleum bitumen produced through a controlled oxidation process. This specialized bitumen, characterized by its lower penetration and higher softening point compared to primary pure bitumen, is used for various applications in the construction industry. The numerical values “85/25” represent the midpoint of the material’s softening point and penetration, with a softening point of 85°C and a penetration value of 25.
Production Process:
The production of Oxidized Bitumen 85/25 involves subjecting a mixture of Vacuum Bottom (VB) and Vacuum Silas (VS) feedstock to specific conditions of pressure and temperature, typically ranging between 200-300°C. Under these conditions, the hydrogen atoms in the bitumen molecules oxidize with the oxygen in the air, leading to a polymerization reaction resulting in bitumen with reduced penetration and higher softening points.
Quality Assurance:
BITUPLUS Company ensures the quality of BITUPLUS Oxidized Bitumen 85/25 by employing international inspectors to verify quality and quantity during loading onto vessels. Rigorous quality control (QC) is carried out through batch test reports before shipping, with the product designed to meet ASTM standards.
Applications:
Oxidized Bitumen 85/25 is used across various industries and applications, including:
- Chemical industry (for manufacturing paints, lacquers, varnishes).
- Fuel industry.
- Paper-pulp-board manufacturing.
- Textile processing.
- Road construction and pavement.
- Civil engineering projects.
- Roofing.
- Construction materials additive.
- Dust-binding applications.
- Insulating and impregnating agent.
- Manufacturing of rubber and plastic products.
- Paving applications.
- Asphalt-based paints for corrosion protection of metals.
- Lining public works structures.
- Adhesives in electrical laminates.
- Base for synthetic turf.
- Waterproofing.
- Corrosion resistance for pipe coatings.
- Portland cement pavement.
- Hydraulic applications.
- Paint manufacturing.
- Caulking.
- Mastics.
- Damp proofing.
- Insulation and isolation bitumen membrane sheets.
- Automobile undercoating in the automotive industry.
Application Guidelines:
To use Oxidized Bitumen 85/25, it should be heated to a temperature double that of its softening point to achieve the desired flow and viscosity. Surfaces intended for application must be dry, clean, and free from loose particles, formwork, curing products, irregularities, slurry, and other contaminants.
Storage and Handling:
Oxidized Bitumen 85/25 has a shelf life of up to 10 years and can undergo multiple heating and cooling cycles.
Packing:
Various packaging options are available for customer convenience, including Kraft bags, meltable plastic bags, drums, and bulk quantities. The product conforms to ASTM standards and is identified by two numbers indicating the softening point and penetration ranges, with 85/25 representing a softening point of 85°C and a penetration of 25 desi millimeters.
Specification of Oxidized Bitumen 85/25
| Bitumen 85/25 | Test method | Unit | Specification |
| Specific gravity @25/25°C | ASTM D70 | (Kg/m3) | 1.05 approx. |
| Penetration @ 25°C | ASTM D5 | mm/10 | 20/30 |
| 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 | 250 min |
| Solubility is CS2(wt) % | ASTM D4 | Wt. % | 99.5 max |
| Spot test | A.A.S.H.O.T 102 | — | Negative |
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