Blown Asphalt 75/25
General description of blown asphalt 75/25
Blown asphalt 75/25 (in another word, blown bitumen 75/25, oxidized asphalt 75/25) 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 asphalt 75/25 is based on petroleum bitumen which is made by blowing asphalt 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. This product, utilized in the industrial sector, exhibits predominantly “solid” characteristics at ambient temperatures and provides SUPERIOR adhesive and waterproofing qualities when applied hot and allowed to cool than Oxidized Bitumen.
RABIT (RAHA BITUMEN) company guaranty the quality of RABIT blown asphalt 75/25 with the arrangement of the international inspector to check quality and quantity of the asphalt 75/25 during the loading to the vessel and controlling the production by QC by batch test report before shipping. RABIT Company guarantees the quality to meet with ASTM.
Uses of blown asphalt 75/25
Blown asphalt 75/25 uses in the chemical, fuel, paints, lacquers, varnishes, paper-pulp-board, textile processing, road construction, pavement ,crack seal and repairmen, civil works, roofing, construction industries; sealing and insulating buildings, adhesive, construction materials additive, dust-binding, insulating and impregnating agent, make rubber and plastic products. The asphalt 75/25 products are for paving. 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 asphalt 75/25 used also for water-proof application and corrosion resistance for pipe coating, Portland cement pavement, hydraulic applications, paint manufacturing, caulking, mastics, and damp proofing. bitumen 75/25 is using insulation and isolation bitumen membrane sheet. Also, Car undercoating Automobile industry is specially required for Blown Asphalt. Vehicle undercoating material is based on Bitumen. Bitumen provides excellent waterproof, dust proof and noise proof for automobile undercoating.
Application of blown asphalt 75/25
The blown asphalt 75/25 should be heated double temperature against the softening point to be able to have flow and viscosity. To use asphalt 75/25, surfaces must be dry, clean and free of loose particles, formwork, curing products, irregularities, slurry, etc.
Storage/handling of blown asphalt 75/25
The validity of asphalt 75/25 is 10 years with multi-time heating and cooling, please refer to MSDS.
packing of blown asphalt 75/25
Various pickings are available for customer’s purpose and conveniences. RABIT Co is the manufacturer of blown asphalt 75/25 in various packing including Kraft bag, meltable plastic bag, drum and bulk asphalt 75/25 from penetration grade bitumen, which is blown by hot air in a controlled process until the desired specification is reached. RABIT blown asphalt 75/25 can be supplied in any grade and are designated by two numbers to indicate the softening point and penetration ranges. The asphalt grade 75/25 means the softening point is 75°c and penetration is 25 desi millimeter is produced in compliance and conformity with ASTM standard and meets the following specification.
Specification of blown asphalt 75/25
Analysis asphalt 75/25
| Bitumen 75/25 | 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 | 70/80 |
| 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.T.O 102 | — | Negative |
