Blown Asphalt 85/35 Description:
Blown Asphalt 85/35, also known as oxidized bitumen 85/35 or blown bitumen 85/35, is a semi-solid grade of pure petroleum bitumen produced through an air-blowing process using an asphalt flux. This specific grade exhibits unique physical properties that make it suitable for various applications within the construction industry. The numerical values “85/35” correspond to the midpoint of the material’s softening point and penetration, respectively. The softening point is measured in degrees Celsius using the Ring and Ball method (ASTM D36), while penetration is measured in 1/10 mm according to IP49 or ASTM-D5 standards.
Production Process:
Blown Asphalt 85/35 is manufactured by subjecting bitumen 60/70 to a controlled air-blowing process with very hot air, resulting in the desired softening point and penetration values.
Quality Assurance:
BITUPLUS Company ensures the quality of BITUPLUS Blown Asphalt 85/35 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:
Blown Asphalt 85/35 finds application across a wide range of industries and uses, including but not limited to:
- 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 Blown Asphalt 85/35, 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:
Blown Asphalt 85/35 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 85/35 representing a softening point of 85°C and a penetration of 35 desi millimeters.
Specification of Blown Bitumen 85/30
| Bitumen 85/35 | Test method | Unit | Specification |
| Specific gravity @25/25 °C | ASTM D70 | (Kg/m3) | 1.05 approx. |
| Penetration @ 25°C | ASTM D5 | mm/10 | 30/40 |
| Softening point °C | ASTM D36 | °C | 80/90 |
| Ductility @25 °C | ASTM D113 | Cm | 1.5min |
| Loss on heating(wt) % | ASTM D6 | Wt. % | 0.2 max |
| Flash point °C | ASTM D92 | °C | 250 min |
| Solubility is CS2(wt) % | ASTM D4 | Wt. % | 99.5 max |
| Spot test | A.A.S.H.T.O 102 | — | Negative |
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