Oxidized Bitumen Application

Oxidized bitumen Application in some industries as sealant and modifier. Blown bitumen or oxidized is a type of bitumen that is obtained by blowing hot air into pure bitumen in the final stage of the refining process. In this process, hot air at a temperature of 200 to 300 degrees Celsius is blown through perforated pipes into a chamber containing bitumen.

Polymerization in the production of blown bitumen

In the production of blown bitumen, the polymerization process is of the additive type. In this process, hot air at a temperature of 200 to 300 degrees Celsius is blown through perforated pipes into a chamber containing bitumen. As a result of blowing hot air, the hydrogen atoms in the hydrocarbon molecules of bitumen combine with the oxygen in the air.

This reaction forms water as a byproduct. By forming new bonds between hydrocarbon molecules, polymer chains of blown bitumen are formed. These chains increase the strength and hardness of blown bitumen. The following methods are used to control the polymerization process in bitumen production: Use of initiators: Initiators initiate the polymerization reaction and affect the rate and extent of polymerization. Use of catalysts: Catalysts affect the rate of polymerization.

Control of reaction conditions: Control of reaction conditions such as temperature, pressure, and pH affects the rate and extent of polymerization. In the production of blown bitumen, free radical initiators are usually used. These initiators cause the formation of free radicals in the hydrocarbon molecules of the bitumen. The free radicals react with each other and form polymer chains in this bitumen.

Properties of Oxidized Bitumen

Lower penetration rate of oxidized bitumen: It has a lower penetration rate than pure bitumen. This means that asphalt is harder and more resistant than pure bitumen. Higher softness rate: It has a higher softness rate than pure bitumen. This means that this bitumen softens at lower temperatures and has greater melting ability.

Less sensitivity to temperature changes: It is less sensitive to temperature changes. This means that asphalt is less deformed at high and low temperatures.

Oxidized Bitumen Application in industries

Oxidized bitumen applications are the following:

Manufacturing of roofing sheets:

Oxidized bitumen application as the main material in the manufacture of roofing sheets.

Manufacturing of car batteries:

Oxidized bitumen application as an insulating material in the manufacture of car batteries.

Coating:

Oxidized bitumen application as a coating material in various industries.

Manufacturing of asphalt:

oxidized bitumen application as one of the main materials in the manufacture of asphalt.

Classification of blown bitumen

The grade of this bitumen is determined based on two parameters: penetration degree and softening point. The penetration degree of blown bitumen is indicated by the letter R and the softening point of bitumen is indicated by the letter S. For example, with a penetration degree of 85 and a softening point of 25, it is known as R85/25.

Its common grades are:

R85/25: This bitumen has a penetration degree of 85 and a softening point of 25. This bitumen has properties such as high hardness, strength and durability.

R90/15: This bitumen has a penetration degree of 90 and a softening point of 15. This bitumen has properties such as softness, high melting ability and good adhesion.

R110/10: This bitumen has a penetration degree of 110 and a softening point of 10. This bitumen has properties such as very high softness and excellent adhesion.

Other grades of bitumen are also produced according to the specific needs of different applications.

Oxidized Bitumen price

This blown bitumen depends on various factors including the type of bitumen, the quality of the bitumen, the supply and demand, and the economic conditions. In general, the price is higher compared to pure bitumen.