Blown Asphalt 75/25 is a semi-solid grade of bitumen produced by blowing air through penetration-grade bitumen at elevated temperatures. This process changes its physical structure, resulting in a product that is harder and more temperature-resistant. The numbers “75/25” indicate its softening point (75°C) and penetration value (25 dmm).
Oxidized Bitumen 75/25 is a preferred material across a variety of industries thanks to its unique physical properties. Let’s explore its most common applications:
Bitumen 75/25 serves as a reliable waterproofing membrane in both above-ground and below-ground structures. It is widely used in flat roofs, basements, and foundations where moisture protection is essential. Thanks to its high softening point, it remains intact under sunlight and extreme heat, preventing leaks and water damage.
This grade is a popular choice for expansion joints, bridge decks, and precast concrete structures. Its rigid nature helps absorb vibration and load stress while maintaining a tight seal between construction elements. Additionally, its chemical stability ensures long-term performance even when exposed to de-icing salts, oils, or atmospheric pollutants.
Oxidized Bitumen 75/25 provides superior anti-corrosion protection when applied as an external coating on metal and concrete pipelines. It creates a durable, impermeable layer that shields against groundwater, salt intrusion, and acidic soils. Engineers use it especially in hot regions where lower-grade coatings may fail under temperature variations.
Due to its high dielectric strength and moisture resistance, this bitumen grade is used in electrical cable insulation and transformer casings. In mechanical settings, it is also used in vibration dampening layers and protective linings for industrial equipment that operates at high temperatures.
Each application leverages the material’s hardness, water resistance, and thermal durability to deliver long-term performance, reduced maintenance, and higher safety standards.
FAQ: What is Oxidized Bitumen 75/25?
What is Oxidized Bitumen 75/25 and how is it made?
Blown Asphalt 75/25 is a semi-solid grade of bitumen produced by blowing air through standard penetration bitumen at high temperatures. This process increases the softening point while decreasing penetration and ductility. As a result, it becomes more heat-resistant and less flexible, making it suitable for industrial applications like waterproofing and pipe coating.
Where is Bitumen 75/25 commonly used?
You will find Bitumen 75/25 in roofing, road construction, pipe coatings, bridge joints, and expansion seals. It performs exceptionally well in areas exposed to high temperatures or where strong waterproofing and chemical resistance are required. Many industrial sectors prefer this grade for its durability and long-term performance.
Is Blown Asphalt 75/25 environmentally safe?
While Oxidized Bitumen 75/25 is derived from petroleum, it poses minimal risk when properly applied and cured. It is non-soluble in water and does not leach harmful substances. For best results, always follow safe handling procedures and environmental guidelines during transportation and application.
How does Bitumen 75/25 perform in extreme temperatures?
This bitumen grade handles temperature extremes very well. Its high softening point (around 75°C) ensures it does not melt in hot conditions. At the same time, its stable composition prevents brittleness in cooler environments. These characteristics make it a reliable choice for demanding weather conditions.
What are the benefits of using Oxidized Bitumen over traditional bitumen?
Oxidized Bitumen offers better thermal stability, lower penetration, and improved aging resistance compared to traditional penetration-grade bitumen. It also maintains its structural integrity longer under mechanical stress and chemical exposure. These advantages reduce maintenance costs and extend service life.
How should I store and handle Oxidized Bitumen 75/25?
Store the material in a dry, shaded area away from direct sunlight or open flames. Use steel drums or bitumen blocks for safe storage. When handling, heat the bitumen slowly to 180–220°C and wear heat-resistant gloves, face shields, and protective clothing to prevent burns or injuries.
Oxidized Bitumen 75/25 stands out as a high-performance material across several industries. Thanks to its high softening point and low penetration rate, it delivers superior thermal stability and long-term durability.
Whether you need a solution for waterproofing, corrosion resistance, or thermal insulation, this grade of bitumen offers excellent results in even the most demanding environments.
By choosing Blown Asphalt 75/25, you’re investing in a product that resists weathering, provides structural strength, and minimizes maintenance costs over time.
Its reliable performance makes it a preferred choice for engineers and contractors worldwide.
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Industrial Applications of Bitumen 60/70
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