Oxidized Bitumen (Blown Bitumen)

Oxidized Bitumen is a type of bitumen that obtains from blowing air to the pure bitumen. It has a lower penetration grade and more softening point in comparison to pure bitumen.
Based on its softening point and penetration grade it classifies into three types of low, medium and hard oxidized bitumen.
To know more about oxidized bitumen, read this article.

Petroleum air oxidizing bitumen system

All Petroleum air based products, refined from blowing hydro-carbon with special attention to temperature and pressure of blowing tower. We export all blown grade of bitumen including air oxidized asphalt 115/15 and 150/5 to soft grades as 75/25 and 85/40.

Oxidized Bitumen Grades

This type of bitumen has many grades. Low oxidized bitumen grades are R75/25, R75/30, R85/25, R85/40, R95/25, R90/40. Medium grades are R90/10, R90/15 and hard oxidized bitumen including R115/15, R110/15, R105/5, R105/15, R105/35 and R150/5.

What is the meaning of these numbers?

The asphaltene in this bitumen is polymerized due to blowing air and makes this bitumen rubbery. Based on this rubber property, this bitumen is called Rubberized Bitumen and the letter R shows this.
These numbers show the softening point and penetration grade. For example, R75/25 tells that the softening point is 75 and the penetration grade of this bitumen is 25.
You can read more about oxidized bitumen applications and some of these grade’s specifications below.

Oxidized Bitumen Production Process

This type of bitumen obtains from the blowing hot air with the temperature of 200 to 300 degree Celsius to the penetration grade bitumen in the reactor of BBU of the refinery.
Hydrogen atoms of bitumen react with oxygen atoms of air when heated with hot air in the reactor. Then it generates some steam that should be removed from the oxidation chamber. Consequently, the bitumen remains.

Production capacity

Minimum order quantity of oxidized bitumen is 1x20ft and able to deliver 3000MT monthly. We are providing in various grades including oxidized bitumen 115/15 95/25 85/40 90/40 85/25 150/5 or hard asphalt and any other asphalt types III 3 of it according to order .Throughout the world, more than 7 types of bitumen that is produced depend on the type of weather conditions one of them is oxidized bitumen.

Oxidized Bitumen Applications

We recommend dried bitumen grades for sealing saw cuts and joints where there is expected to be the minimum amount of moving in the joint. Their wide temperature range prevents bleeding in high temperature applications. It can be used in industrial applications like roofing; flooring, mastics, pipe coatings, electrical applications.
oxidized bitumen 115/25 is an asphaltic adhesive substrate for asphalt membranes. Metal and concrete protective coating under atmospheric conditions .It is using for coating of pipelines. Oxidized asphalt is impregnation of coating of papers and boards .Bonding agent for tiles and mastic also bonding agent for cork plates and adhesive for roofing felts .The Oxidized bitumen is adhesive for laminated boards to protection for electrical wires.
It has many applications including road construction, hydropower projects, roofing, flooring, mastics, oil and gas industry and electrical applications.
Roads: this type of bitumen is suitable for road construction, paving and road maintenance. It can be used as an additive with a binder in different asphalts in roads, highways, railroads and parking.

Hydro projects:

One of the canal lining’s material is oxidized bitumen. This type of bitumen can be used in other hydro projects like embankment and dam construction, hydraulic structures, dam lining protection and sand stabilization

Roofing:

oxidized bitumen can be used in roofing felts, shingle roofs, damp proof coating compositions, and carriage roofing compounds, liquid roof coatings and plastic cements. Generally speaking it is the best choice for roof waterproofing.

Flooring:

one of the main uses of oxidized bitumen is in flooring. Acid and alkali proof bitumen mastic can be used in chemical plants, fertilizer plants, steel plants and many other plants to protect the surface from corrosion. It can also fix the parquet of floors.

Oil and gas industry:

besides the MC30 Bitumen, this type of bitumen is very common in the oil and gas industry to coat the pipelines to protect pipes from corrosion and rust.

Electrical industry:

oxidized bitumen is adhesive for laminated boards. It can seal the electrical junction boxes. It can be used in the cable industry, in lithium- ion batteries and wires.

Oxidized Bitumen Advantages

The main advantages of oxidized bitumen is as below:

High durability
High flexibility
Completely water resistant
Chemical stability

Oxidized Bitumen Specification

Among these bitumen, the most widely used oxidized or blown bitumen in the market is R85/25 that its softening point is 85 and its penetration grade is 25.

Oxidized bitumen 85/40 is popular in some European countries like Denmark, Norway, Finland and Sweden.
The standard test methods used to obtain each property is as below:

Specific Gravity : ASTM D70
Penetration : ASTM D5
Softening Point : ASTM D36
Loss on heating : ASTM D6
Flash point : ASTM D92
Solubility : ASTM D4
Ductility : ASTM D113
Spot test : AASHTO 102

Packing of dried bitumen

We are manufacturing all grades of dried bitumen in various packing as below: dried bitumen packed in 25 or 50kg meltable polyamide bag. The melting temperature of the bag is 160~180C. It is packed in 25 or 50Kg Craft bag.

Oxidized Bitumen Packing