What is Oxidized Bitumen 75/25? | Production, Specs & Applications

🧪 What is Oxidized Bitumen 75/25? – Composition, Properties, and Industrial Applications

Oxidized Bitumen 75/25, also known as blown bitumen, is a semi-solid bituminous material produced by the controlled air-blowing process of penetration-grade bitumen. This specific grade, 75/25, refers to its softening point of approximately 75°C and a penetration value of about 25 dmm. Due to its unique molecular structure and improved thermal and chemical stability, Oxidized Bitumen 75/25 is widely used in specialized industrial applications requiring heat resistance, waterproofing, and high durability.

In this comprehensive guide, we will explore its production process, physical characteristics, typical applications, and the industrial value it offers.  Peak Universal Business is highlighted as a trusted supplier, ensuring high-quality oxidized bitumen for various industrial needs.

❓ What is Oxidized Bitumen 75/25?

Oxidized Bitumen 75/25 is a hard, non-penetrable bituminous material created through the oxidation of base bitumen using air at high temperatures. The chemical structure is altered through oxidation, increasing its asphaltene content and reducing the penetration value, which enhances its resistance to deformation and heat.

📦 Key Characteristics:

• Softening Point: 75°C (High resistance to flow under heat)

• Penetration Value: 25 dmm (Indicates hardness and durability)

• Thermal Stability: Excellent for high-temperature environments

• Water Resistance: Strong impermeability and chemical resilience

This grade is ideal for industries that demand bitumen to withstand prolonged exposure to heat, air, and water.

It offers a balance between flexibility and durability, making it ideal for moderate climate industrial applications where both adhesion and temperature resistance are essential.

Technical Properties of Oxidized Bitumen 75/25

Chemical Composition

Oxidized bitumen is composed of hydrocarbons derived from crude oil, similar to other types of bitumen. However, the oxidation process alters its chemical structure, increasing the content of asphaltenes and resins while reducing the proportion of oils. This modification results in a bitumen with higher viscosity and improved thermal and chemical stability.

Physical Properties

• Softening Point: Approximately 75°C
• Penetration Value: Approximately 25 dmm (decimillimeters)
• Ductility: Reduced compared to non-oxidized bitumen, providing increased hardness.
• Thermal Stability: Enhanced stability at higher temperatures.
• Weather Resistance: Improved resistance to environmental factors such as UV radiation and oxidation.

These properties make Oxidized Bitumen 75/25 suitable for applications where durability, stability, and resistance to environmental conditions are crucial.

🏭 Production Process of Oxidized Bitumen 75/25

The production of Oxidized Bitumen 75/25 is carefully managed to achieve desired physical properties. Here’s a step-by-step overview:

1. ⚗️ Selection of Base Bitumen

Penetration-grade bitumen (typically 60/70 or 80/100) is selected as the base material. The choice of base directly affects the quality of the final oxidized product.

2. 🔥 Air Blowing in Reactor

The base bitumen is heated to temperatures ranging from 240°C to 300°C in a reactor. Controlled air is blown through the molten bitumen to initiate oxidation. This changes the molecular structure and increases the asphaltene content.

3. 🌬️ Reaction Monitoring

The process is closely monitored to control viscosity, penetration, and softening point. The oxidation continues until the bitumen reaches the desired grade (75/25).

4. 🧊 Cooling and Packaging

After oxidation, the bitumen is cooled and then packed in molds, drums, or blocks for transport and storage.

5. 🔍 Quality Control

Quality control is critical in the production of Oxidized Bitumen 75/25 to ensure consistency and performance. This involves testing the softening point, penetration value, ductility, and other physical properties to meet industry standards and specifications.

Peak Universal Business adheres to stringent quality control measures to provide high-quality Oxidized Bitumen 75/25, ensuring its reliability for various industrial applications.

📊 Technical Properties of Oxidized Bitumen 75/25

Property	Unit	Specification
Softening Point (R&B)	°C	75 ± 5
Penetration @ 25°C	dmm	20 – 30
Ductility @ 25°C	cm	> 1.5
Loss on Heating	%	< 0.5
Flash Point	°C	> 250
Solubility in CS2	%	> 99.5

🔍 Explanation of Key Properties:

• Softening Point: Resistance to softening at elevated temperatures

• Penetration: Lower penetration = higher hardness

• Ductility: Flexibility under tensile force

• Flash Point: Ensures safety during heating

• Solubility: Confirms purity and chemical consistency

🏗️ Industrial Applications of Oxidized Bitumen 75/25

Industrial applications of oxidized bitumen 75/25 is used across numerous industries due to its unique properties. Below are detailed descriptions of its applications in different sectors:

🧱 1. Roofing Industry

• Waterproofing Membranes

Oxidized Bitumen 75/25 is extensively used in the production of waterproofing membranes. Its high softening point and low penetration value make it ideal for creating durable and effective waterproofing layers. These membranes are used in roofing systems to prevent water infiltration, ensuring the longevity and integrity of the structures.

• Roofing Felts and Shingles

The roofing industry relies on oxidized bitumen for the manufacture of felts and shingles. These materials provide excellent weather resistance and durability, making them suitable for various climatic conditions. The bitumen’s adhesive properties also ensure a strong bond with the roofing substrate, enhancing the overall performance of the roofing system.

🏭 2. Construction Industry

• Road Construction

In road construction, Oxidized Bitumen 75/25 is used as a binder for asphalt mixtures. Its high thermal stability and resistance to deformation under load make it ideal for creating durable road surfaces. The bitumen’s enhanced properties ensure that the roads can withstand heavy traffic and adverse weather conditions without significant deterioration.

• Expansion Joints

Oxidized bitumen is also used in the construction of expansion joints in concrete structures. These joints accommodate thermal expansion and contraction, preventing cracks and structural damage. The bitumen’s flexibility and durability make it an excellent material for this application.

🛠️ 3. Electrical Industry

• Electrical Insulation

Oxidized Bitumen 75/25 is used as an insulating material in the electrical industry. Its dielectric properties and resistance to moisture and environmental factors make it suitable for insulating cables, transformers, and other electrical components. This ensures the safe and efficient operation of electrical systems.

• Capacitors

In the manufacture of capacitors, oxidized bitumen serves as an insulating and sealing material. It provides excellent thermal stability and moisture resistance, ensuring the reliability and longevity of the capacitors.

🏗️ 4. Industrial Coatings

• Anti-Corrosion Coatings

Oxidized bitumen is used in the production of anti-corrosion coatings for metal structures. These coatings provide a protective barrier against moisture, chemicals, and environmental factors, preventing rust and corrosion. This is particularly important in industries such as oil and gas, where metal structures are exposed to harsh conditions.

• Protective Coatings for Pipes

In the oil and gas industry, oxidized bitumen is applied as a protective coating for pipelines. The bitumen’s resistance to chemicals and environmental degradation ensures the longevity and integrity of the pipelines, preventing leaks and failures.

🧪 5. Adhesive Industry

• Hot-Melt Adhesives

Oxidized Bitumen 75/25 is used in the formulation of hot-melt adhesives. These adhesives are used in various applications, including packaging, bookbinding, and automotive assembly. The bitumen’s adhesive properties and thermal stability ensure strong and durable bonds.

• Sealants

The construction and automotive industries use oxidized bitumen in the production of sealants. These sealants provide excellent adhesion and flexibility, ensuring a secure and long-lasting seal in joints and seams.

🛢️ 6. Paint and Coatings Industry

• Industrial Paints

Oxidized bitumen is used as a component in industrial paints and coatings. These paints provide a protective barrier against moisture, chemicals, and environmental factors, ensuring the longevity and appearance of the coated surfaces.

• Marine Coatings

In the marine industry, oxidized bitumen is used in coatings for ships and offshore structures. These coatings provide excellent resistance to saltwater and harsh marine environments, preventing corrosion and degradation.

✅ Benefits to Consumers and Industrial Users

• 💧 Excellent Waterproofing – Highly effective against moisture and damp environments

• 🔥 Thermal Resistance – Withstands high operational temperatures without softening

• 🧱 Long-Term Durability – Minimal degradation over time

• 🛠️ Versatile Use – Compatible with a wide range of industrial materials and chemicals

• 📉 Cost Efficiency – Reduced maintenance and longer service life

• Durability

Oxidized Bitumen 75/25 offers exceptional durability, making it suitable for long-term applications. Its resistance to environmental factors, chemicals, and thermal degradation ensures that it performs reliably under various conditions.

• Versatility

The versatile properties of Oxidized Bitumen 75/25 allow it to be used in a wide range of applications across different industries. Its ability to provide waterproofing, insulation, and protection makes it a valuable material for numerous industrial processes.

• Cost-Effectiveness

Oxidized bitumen is a cost-effective material, providing excellent performance at a relatively low cost. Its long lifespan and minimal maintenance requirements further enhance its cost-effectiveness, making it an attractive choice for various applications.

• Environmental Benefits

The use of oxidized bitumen can contribute to sustainable practices in the construction and manufacturing industries. Its durability and resistance to degradation reduce the need for frequent replacements, minimizing waste and resource consumption. Additionally, the bitumen can be recycled at the end of its life cycle, further reducing its environmental impact.

• Enhanced Performance

The specific properties of Oxidized Bitumen 75/25, such as its high softening point and low penetration value, provide enhanced performance in demanding applications. Its ability to withstand extreme temperatures and environmental conditions ensures reliable and consistent performance.

Peak Universal Business: Your Trusted Supplier of Oxidized Bitumen 75/25

• Commitment to Quality

Peak Universal Business is dedicated to providing high-quality Oxidized Bitumen 75/25 that meets industry standards and specifications. Their rigorous quality control processes ensure that customers receive a product that performs reliably in various applications.

• Technical Expertise

With extensive experience in the bitumen industry, Peak Universal Business offers unparalleled technical expertise. They provide valuable insights and support to help customers select the right bitumen products for their specific needs.

• Reliable Supply Chain

Peak Universal Business maintains a robust supply chain to ensure timely and reliable delivery of Oxidized Bitumen 75/25. Their efficient logistics network minimizes downtime and ensures that customers receive their products when needed.

• Customized Solutions

Understanding that different projects have unique requirements, Peak Universal Business offers customized solutions tailored to meet specific needs. They work closely with customers to provide bitumen products that deliver optimal performance for their applications.

• Sustainability Focus

Peak Universal Business is committed to sustainable practices in the production and distribution of bitumen. They strive to minimize their environmental impact through responsible sourcing, energy-efficient processes, and recycling initiatives.

❓ FAQ – Oxidized Bitumen 75/25

🤔 What does 75/25 in Oxidized Bitumen 75/25 indicate?

“75” refers to the softening point in degrees Celsius, and “25” denotes the penetration value in deci-millimeters.

🏗️ Can it be used for heavy construction projects?

Yes, due to its high softening point and mechanical strength, it’s ideal for demanding construction environments.

🌧️ Is Oxidized Bitumen 75/25 water-resistant?

Absolutely. It offers superior waterproofing, making it suitable for roofing and foundations.

🔥 Is it safe to use at high temperatures?

Yes, with a flash point above 250°C, it’s safe for high-temperature applications.

📦 In what forms is it supplied?

It is typically available in solid blocks, kraft bags, or drum packaging.

🔚 Conclusion

Oxidized Bitumen 75/25 is a versatile, medium-grade blown bitumen with broad industrial applications. Its balance of thermal stability, adhesion, and moisture resistance makes it suitable for use in construction, waterproofing, insulation, and manufacturing.

Whether you’re coating pipelines, bonding roofing materials, or insulating electrical cables, Bitumen 75/25 provides reliable performance and value.

Choosing a trusted supplier like Peak Universal Business ensures that you receive high-quality Oxidized Bitumen 75/25 that meets the stringent demands of your projects. With their commitment to quality, technical expertise, and sustainability, Peak Universal Business is the ideal partner for all your bitumen needs.

As industries continue to seek durable, efficient, and sustainable materials, Oxidized Bitumen 75/25 remains a critical solution, offering exceptional performance and reliability in a wide range of applications.

You can Read More about Oxidized Bitumen Here : 

Blown asphalt 90/40 and Its uses

Applications & Properties of Blown asphalt 85/40

Uses of Blown bitumen 85/25

Blown bitumen for Construction & Roofing Industry

📣Call to Peak Universal Business

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