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Oxidized Bitumen 75/25 Definition

Oxidized Bitumen 75/25 (in another word, blown bitumen 75/25, Blown 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.

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Oxidized Bitumen 75/25 Applications

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.

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.

Blown Asphalt 75/25 CHARACTERISTICS

CHARACTERISTIC 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
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