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Definition of Oxidized Bitumen 85/25

Oxidized Bitumen 85/25 or Oxidized Asphalt is produced by blowing hot air into the penetration bitumen. This action makes the bitumen more rubbery than its original formula and it becomes harder bitumen. This bitumen recovery the weight loss under heating. Due to low thermal sensitivity, the softening point is much higher than regular bitumen and the penetration index (PI) is higher than road construction bitumen (8>PI>2) due to the letter has a gel-like structure because of asphalt accumulation.

Oxidized Bitumen 85/25 is produced by the air-blowing of penetration grade bitumen. This is done at high temperatures, resulting in a material of a much higher penetration index. Oxidized Bitumen 85/25 is based on petroleum bitumen which is made by blowing bitumen 60/70 by very hot air. The designation of the Oxidized Bitumen 85/25 refers to the midpoint of the softening point acceptance criteria.

Oxidized Bitumen 85/25 is produced by either Continuous or Staggered Blowing Process. Heated Penetration Grade Bitumen under controlled environment is blown with air which controls the Oil Content in the Bitumen while it oxidized. The different grades for suited applications produced are designated by two numbers to indicate the mid-points of their softening point and penetration ranges.


As said before, Blown Asphalt 85-25 is based on petroleum bitumen which is made by blowing bitumen 60/70 by very hot air. In addition, the numbers relate to the midpoint of the material’s softening point and penetration respectively. The softening point value measured by Ring and Ball method as determined by ASTM D36. Also, the penetration value is in 1/10 mm as determined by IP49 or ASTM- D5.

Application of Oxidized Bitumen 85/25

Oxidized Bitumen 85/25 is a solid or semi-black solid material and gradually liquid when heated. Oxidized Bitumen grades are blown or oxidized Asphalt ‘s which are produced by passing air through soft bitumen under controlled temperature conditions. This process gives the bitumen more rubbery properties than penetration or hard grade bitumens and a variety of uses in industrial applications.

Oxidized Bitumen 85/25 is widely used as an anti-slip layer compound in the piling industry, for the manufacture of roofing felts, the roofing and waterproofing industries, for sound dampening felts and under carriage sealant in the automotive industry, electric cable joint protection, joint filling compound, carpet-backing, corrosion protection, acoustic panels, chemical, fuel, Manufacture of paints, sealant compound, and many others. Also used in sealing saw cuts and joints where expected movements are minimum. It is also used in the manufacturing of bituminous marine mastic for the oil & gas pipeline joints. Further, Oxidized Bitumen is used in the manufacture of bituminous marine mastic, which is required for the oil and gas pipeline joints.

  • Used as sealing of expansion joints
  • Used as repair of joints or cracks
  • Used as fixation of parquet floors
  • Used as adhesive to be used in thermal insulation
  • Used as repair of unexposed cracks
  • Used as bonding of wet briquettes
  • Used in various industries like roofing, isolation, insulation flooring, mastics, pipe coatings, electrical applications

Packing of Oxidized Bitumen 85/25

HJ OIL Co. is the manufacturer of Oxidized Bitumen 85/25 in various packing, including bitumen 85/25 is available in 20 & 50 kg Kraft Paper Bags / Poly Amide Bags, 25 kg Carton box and 150, 180, 200kg Steel Drums. In addition, oxidized bitumen packing also palletize, 40 bags can stack on the pallet. 20 pallet can load to the 20ft container.


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