Blown asphalt 90/40 (in another word, oxidized bitumen 90/40, blown bitumen 90/40) 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 asphalt 90/40 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.
Oxidized Asphalt is a solid or semi-black solid material and gradually liquid when heated, oxidized asphalt is predominant content bitumen, asphalt, molten (oils) and aromatic resins. The oxidized asphalt or blown asphalt is producing in different softening point and penetration.
RABIT (RAHA BITUMEN) company guaranty the quality of RABIT blown asphalt 90/40 with the arrangement of the international inspector to check quality and quantity of the blown asphalt 90/40 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 90/40

Blown asphalt 90/40 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 90/40 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 90/40 used also for water-proof application and corrosion resistance for pipe coating, Portland cement pavement, hydraulic applications, paint manufacturing, caulking, mastics, and damp proofing. Blown asphalt 90/40 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 95/25

The blown asphalt 90/40 should be heated double temperature against the softening point to be able to have flow and viscosity. To use asphalt 90/40, surfaces must be dry, clean and free of loose particles, formwork, curing products, irregularities, slurry, etc.