Oxidized Bitumen 90/10 or Blown Bitumen 90/10 is a semi-solid grade oxidized type of Bitumen Generally.

This grade of Bitumen, R90/10, is made by Pure Bitumen aeration, which leads to Bitumen oxidization with air. In this operation, hydrogen gets a reaction with oxygen atoms, and the result is bitumen that has lower penetration and higher softening point than the initial Bitumen. Penetration Bitumen 60/70 is a raw material for the production of Blown Bitumen 90/10 and many other grades by passing very hot air through the Bitumen 60/70, the oxidation operation begins.

During this procedure, all parameters like temperature, pressure, oil content, etc., must be monitor and control. Without accurate monitoring and controlling parameters, desired goals will not achieve. Because of the special rubbery properties of this grade, it can be used in numerous industries.

Technical Properties:

Oxidized Bitumen 90/10 or blown bitumen 90/10 or R90/10 has a softening point equal to 90℃ and its Penetration degree equal to 10 desi-millimeter. Its technical properties are measured by ASTM Method.

The ASTM-D36 and ASTM-D5 are used to value softening point and Penetration, respectively.


Oxidized Bitumen 90/10 (or Blown Bitumen 90/10 or R90/10) manufactured by PUB-LTD CO. is used in numerous industrial applications and operations. It has rubber property more than previous grades; because of its particular property in oxidization procedure. It is used in the production of especial paints, civil works, construction, road construction, roofing, facing, flooring, as anti-slip layer components, undercarriage sealant in the cars and automobile industry, in the pilling industry, electrical operations, cable coating, oil and gas pipelines coating, crack sealing, road repair operations, pulp papers, bituminous products, textile, joint filling compound, sound-reducing agent, dust proofing, waterproofing, roofing felts, lacquers, varnishes, pavements, fuel combination, and paving.

Furthermore, it’s used as raw material for adhesive, insulation, isolation bitumen membrane sheet, chemical, especial bitumen-based paints and colors to protect metal structures from corrosion, hydraulic applications and operations, Portland cement pavements, as a base for synthetic turf, producing rubber and plastic production.


Heating Bitumen in most final uses is a critical stage. Generally, the most important thing in this procedure is heat control. Temperature and heat control can affect various aspects of the product, including its quality. The safe and recommended maximum temperature is 230℃.

All Oxidized Bitumen is not hazardous at below 100℃ during shipping operations. Heating and heat transfer should be control. Without good heat transfer may cause overheating and release low flash vapors, which these unwanted side products have a higher fire risk.

Also, melted bitumen should not be left in the boiler to get cold. Because it can cause overheating and needs more positional energy. Furthermore, placement and installing any temperature and pressure monitoring and control devices are very important. Because if their placement is not true, thermometers can’t display the real temperature that it can leads to poor monitoring and thermal conductivity.

Health/ Safety:

Everyone who works in Oxidized Bitumen plants should be wear gloves, masks (especial protective masks), and safety glasses. For more information, please refer to MSDS.


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