Introduction

Oxidized bitumen, also known as blown bitumen, is a specialized form of bitumen with enhanced properties achieved through controlled oxidation. This modification improves its resistance to temperature variations, making it a preferred material in roofing, waterproofing, and road construction. The oxidized bitumen production plant plays a crucial role in refining and manufacturing different grades, including bitumen 115/15—one of the most widely used grades.

The increasing demand for durable construction materials has led to significant advancements in the production process of oxidized bitumen. The ability to customize properties by controlling the oxidation parameters ensures that different industries can benefit from the improved thermal stability, water resistance, and superior adhesion offered by oxidized bitumen. Moreover, its relevance extends to various infrastructure projects, including highways, bridges, and industrial roofing solutions. As the industry continues to innovate, the role of oxidized bitumen in sustainable and long-lasting applications remains indispensable.

This article explores the production process, plant components, applications, and benefits of oxidized bitumen, with a particular focus on 115/15 and its relation to bitumen 40/50.

Oxidized Bitumen Production Process

The production of oxidized bitumen involves the controlled introduction of hot air into penetration-grade bitumen, such as bitumen 40/50, under specific temperature and pressure conditions. The oxidation process alters the molecular structure, increasing asphaltene content while reducing oil components. This results in a more elastic and temperature-resistant material.

Key steps in the oxidation process include:

1.     Heating the Base Bitumen – The selected bitumen, such as 40/50 or 60/70, is heated to temperatures between 230°C and 260°C.

2.     Air Blowing Process – Air is blown through the heated bitumen in reactors, leading to oxidation.

3.     Cooling and Solidification – The oxidized bitumen is cooled and transformed into solid or semi-solid forms.

4.     Packaging and Distribution – The final product is packed in drums, blocks, or bulk containers for industrial use.

The entire process enhances softening point, penetration index, and flexibility, making oxidized bitumen highly suitable for various industrial applications.

Components of an Oxidized Bitumen Production Plant

A modern oxidized bitumen production plant consists of several essential components:

• Bitumen Storage Tanks – Hold raw penetration-grade bitumen (e.g., 40/50 or 60/70).
• Oxidation Reactors – The core unit where air-blowing and oxidation take place.
• Cooling System – Used to regulate the temperature and control the final product’s consistency.
• Packing and Distribution Units – Facilitate packaging in different formats based on industry requirements.
• Emissions Control System – Ensures environmental safety by reducing harmful gas emissions during oxidation.

An efficient plant setup is crucial for consistent quality production, cost-effectiveness, and environmental compliance.

Uses of Oxidized Bitumen 115/15

Bitumen 115/15 is a specialized oxidized grade with a softening point of 115°C and a penetration value of 15 dmm. Its unique properties make it ideal for:

1. Waterproofing and Roofing

• Used in roofing felt production, membrane sheets, and sealing compounds.
• Provides excellent resistance to water penetration, extending the lifespan of buildings.

2. Road Construction and Pavement Sealing

• Used as an adhesive in road repairs and pavement sealing.
• Enhances asphalt durability, particularly in extreme weather conditions.

3. Pipe Coating and Corrosion Protection

• Applied as an anti-corrosion coating in steel pipes, marine structures, and industrial pipelines.
• Ensures long-term resistance to chemical and environmental degradation.

4. Electrical Insulation

• Acts as an insulating material in electrical and telecommunication cable coatings.
• Prevents moisture penetration and enhances durability.

Relation Between Bitumen 40/50 and Oxidized Bitumen 115/15

Bitumen 40/50 is often used as a base material in the oxidation process to produce oxidized bitumen 115/15. The reason for selecting 40/50 as a base is its ideal penetration value, which allows controlled modification without compromising essential properties.

When 40/50 bitumen undergoes oxidation, it achieves a higher softening point and lower penetration value, resulting in bitumen 115/15, which is more suitable for industrial applications requiring heat stability and reduced flow at high temperatures.

Advantages of Using Oxidized Bitumen 115/15

• High Thermal Stability – Withstands extreme temperatures without melting or softening.
• Water Resistance – Ideal for waterproofing applications.
• Chemical Resistance – Protects against corrosion and oxidation in industrial settings.
• Improved Adhesion – Enhances bonding in asphalt mixtures, coatings, and sealants.
• Eco-Friendly – Compared to cutback bitumen, oxidized bitumen has lower volatile emissions.

Conclusion

Oxidized bitumen production, particularly 115/15, plays a crucial role in modern construction, waterproofing, and industrial applications. The production process, which involves oxidizing penetration-grade bitumen such as 40/50, enhances its thermal resistance, adhesion, and durability.

With its widespread applications in roofing, road construction, corrosion protection, and electrical insulation, bitumen 115/15 remains an essential material in various industries. The use of bitumen 40/50 as a base ensures a reliable and high-quality final product. As demand for durable and environmentally friendly materials grows, oxidized bitumen continues to be a preferred choice across multiple industries worldwide.

Furthermore, the growing infrastructure sector globally is driving demand for superior bitumen products. With increasing focus on climate-resilient roads and sustainable construction materials, oxidized bitumen offers a reliable solution. Governments and private sectors investing in long-lasting roads, energy-efficient buildings, and water-resistant structures continue to rely on 115/15 bitumen.

The integration of bitumen 40/50 into the production of oxidized bitumen demonstrates its foundational role in modern bitumen applications. By selecting the right base bitumen, manufacturers can achieve optimal performance for various climate conditions and industrial needs. As technology advances, the development of more efficient oxidation methods and eco-friendly production