Oxidized Bitumen or Blown Asphalt or Blown Bitumen is produced by either a Continuous or Staggered Blowing Process. Heated Penetration Grade Bitumen under a 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 midpoints of their softening point and penetration ranges.

This process gives the bitumen more rubbery properties than its original formula and they are simply harder bitumen. Hard bitumen under controlled temperature conditions 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, 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 oil & gas pipeline joints.

Oxidized Bitumen or Blown Asphalt is produced by blowing hot air into the penetration bitumen. 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 having a gel-like structure because of asphalt accumulation. Special physical properties of its grade can be used in different applications in the construction business. Oxidized Bitumen is made by an ongoing or Staggered Blowing Process. Heated Penetration bitumen under a controlled environment is blown with air which controls the oil content in bitumen while it oxidized.

Blown Bitumen is produced by the air blowing of penetration-grade bitumen. This is done at high temperatures, resulting in a material with a much higher penetration index. Blown Bitumen is based on petroleum bitumen which is made by blowing bitumen 60/70 by very hot air. The designation of the Blown Bitumen refers to the midpoint of the softening point acceptance criteria. It 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 was measured by the Ring and Ball method as determined by ASTM D36. Also, the penetration value is 1/10 mm as determined by IP49 or ASTM–D5. 

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

Oxidized Bitumen is Blown Asphalt that is exported in various grades as Oxidized Bitumen 115/15, Blown Bitumen 90/40, 75/25, 85/25, 90/15, 105/35, 150/5, 95/25, and any other grade will produce according to to order. Throughout the world, more than 7 types of bitumen are produced depending on the type of weather conditions one of them is Oxidized Bitumen or Blown Bitumen. Oxidized Bitumen grades are suitable for sealing saw cuts and joints where there is expected to be a minimum amount of movement in the joint. Their wide temperature range prevents bleeding in high–temperature applications.

Some of the major advantages of Oxidized Bitumen are that it is completely water-resistant, highly flexible, and durable. Furthermore, it is chemically very stable. Oxidized bitumen is a very flexible compound that is not only chemically stable but also a very durable compound apart from being completely water-resistant. Lastly, it has some very prominent technical advantages that make it a very sought-after compound in various applications.

Oxidized Bitumen Grades are suitable for sealing saw cuts and joints where there is expected to be a minimum amount of movement in the joint. Their wide temperature range prevents bleeding in high–temperature applications. Oxidized bitumen can also be used in industrial applications like Roofing, Flooring, Mastics, Pipe coatings, and Electrical applications to name a few.

Oxidized Bitumen or Oxidized Asphalt range is used in the waterproofing industries, for carpet–backing, corrosion protection, acoustic panels, and the manufacture of paints, amongst other applications.

Air–Blowing:

The manufacturing process is used to make oxidized roofing asphalts in which air is blown through an asphalt flux. An exothermic oxidation reaction occurs, yielding asphalt that is harder, more viscous, less volatile, and less temperature–susceptible than the asphalt flux used as the feedstock to the process.

Asphalt, Oxidized (Blown Or Air–Refined):

Asphalt is treated by blowing air through it at elevated temperatures to produce the physical properties required for the industrial use of the final product. Oxidized asphalts are used in roofing operations, pipe coating, under-sealing for Portland cement concrete pavements, hydraulic applications, membrane envelopes, some paving–grade mixes, and the manufacture of paints.

Blowing Still:

A closed process vessel fitted at its base with a sparger and used in the air–blowing process to make many types of roofing asphalt.

Coating Asphalt:

An air-blown or oxidized asphalt used to manufacture roofing materials used in a variety of roofing systems such as asphalt shingles, polymer-modified bitumen roofing, reinforcing and underlayment felts, and roll roofing products.

STANDARD SPECIFICATION OF OXIDIZED BITUMEN GRADE 75/25

STANDARD SPECIFICATION OF OXIDIZED BITUMEN GRADE 75/35

STANDARD SPECIFICATION OF OXIDIZED BITUMEN GRADE 85/25

STANDARD SPECIFICATION OF OXIDIZED BITUMEN GRADE 85/35

STANDARD SPECIFICATION OF OXIDIZED BITUMEN GRADE 85/40

STANDARD SPECIFICATION OF OXIDIZED BITUMEN GRADE 90/10

STANDARD SPECIFICATION OF OXIDIZED BITUMEN GRADE 90/15

STANDARD SPECIFICATION OF OXIDIZED BITUMEN GRADE 90/40

STANDARD SPECIFICATION OF OXIDIZED BITUMEN GRADE 95/25

STANDARD SPECIFICATION OF OXIDIZED BITUMEN GRADE 105/15

STANDARD SPECIFICATION OF OXIDIZED BITUMEN GRADE 105/35

STANDARD SPECIFICATION OF OXIDIZED BITUMEN GRADE 110/30

STANDARD SPECIFICATION OF OXIDIZED BITUMEN GRADE 115/15