Oxidized Bitumen 85/25: Specifications, Applications & Performance Insights

Discover Oxidized Bitumen 85/25: complete specifications, performance features, and industrial applications in waterproofing, insulation, coatings, and more.

🛢️ Oxidized Bitumen 85/25: Specifications, Applications & Performance Insights

Oxidized Bitumen 85/25 is a hard-grade blown bitumen designed for applications requiring high softening point and reduced flow. With its superior thermal resistance, water repellency, and adhesive strength, it is ideal for waterproofing, corrosion protection, road construction, and insulation systems. This guide explores the technical characteristics, industrial applications, and usage recommendations of Blown Asphalt 85/25 in full detail.

🔍 What is Oxidized Bitumen 85/25?

Oxidized Bitumen 85/25, also referred to as Blown Asphalt 85/25 or Bitumen 85/25, is a refined bituminous product produced by passing air through hot bitumen in a controlled oxidation process. The result is a highly viscous, semi-solid material with increased softening point (85°C) and lower penetration (25 dmm).

These properties make it highly resistant to deformation under heat and pressure, and thus suitable for demanding environments like hydraulic structures, anti-corrosive coatings, and industrial sealing.

Applications of Bitumen 60/70, Blown Asphalt Production Process, Asphalt road surfaces,
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⚙️ Technical Specifications of Oxidized Bitumen 85/25

PropertyTypical ValueTest Method
Softening Point (Ring & Ball)85 ± 5 °CASTM D36
Penetration @ 25°C20–30 dmmASTM D5
Flash Point (COC)> 250 °CASTM D92
Loss on Heating (wt.%)< 0.5%ASTM D6
Solubility in Trichloroethylene≥ 99%ASTM D2042
Specific Gravity @ 25°CApprox. 1.05ASTM D70
Ductility @ 25°C< 1.5 cmASTM D113
Drop PointApprox. 180 °CASTM D3954
AppearanceDark black, solidVisual Inspection

📊 Detailed Breakdown of Technical Values:

  • Softening Point (85°C): Offers high resistance to temperature deformation, ideal for hot climates and thermal insulation systems.

  • Penetration (20–30 dmm): Indicates a very stiff material, enhancing performance in structural and protective applications.

  • Flash Point (>250°C): Ensures superior safety during high-temperature application and processing.

  • Loss on Heating (<0.5%): Reflects stability during storage and thermal exposure.

  • Solubility (≥99%): Verifies purity and ease of incorporation in solvent-based systems like coatings and paints.

  • Ductility (<1.5 cm): A sign of rigidity—best for stable and static applications rather than flexible membranes.

  • Drop Point (~180°C): Prevents flow or dripping at high ambient temperatures.

  • Color & Texture: Solid black with smooth finish, typical of high-grade oxidized bitumen.

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Applications of Bitumen 60/70, Penetration Asphalt, Blown Asphalt Production Process, How to Produce Oxidized Bitumen? Industrial Bitumen Uses,

🏭 Industrial Applications of Oxidized Bitumen 85/25

Oxidized Bitumen 85/25 is engineered for heavy-duty performance in high-temperature and chemically exposed environments. Below are the primary sectors and use cases.

🧱 1. Building Foundation Waterproofing

Bitumen 85/25 forms a solid waterproof barrier for below-grade foundations, basements, and retaining walls. Its low penetration ensures long-term performance, especially in hydrostatic pressure zones. It is applied hot, creating seamless protection against ground moisture and vapor ingress.

🧪 2. Chemical Industry Coatings

In chemical processing plants, Oxidized Asphalt 85/25 is used to line reactor vessels, settling tanks, and secondary containment systems. Its chemical stability resists:

  • Alkaline spills

  • Acid vapors

  • Solvent exposure

Bitumen 85/25 also serves in bituminous enamel coatings for industrial-grade chemical insulation.

🛢️ 3. Pipeline and Steel Structure Protection

Blown Asphalt 85/25 is a key ingredient in anticorrosion coatings for steel pipelines, tanks, ducts, and metal girders. When combined with reinforcing wraps or glass fabric, it provides long-lasting, dielectric shielding against:

  • Soil corrosion

  • Electrochemical attack

  • Moisture intrusion

🚧 4. Road Expansion Joint Sealing

Thanks to its hardness and high softening point, 85/25 is used in bridge decks, road expansion joints, and asphalt block sealing. It prevents:

  • Crack propagation

  • Joint migration

  • UV and heat degradation

Blown Asphalt 85/25 also blends well with rubber modifiers for enhanced elasticity.

🔥 5. Thermal Insulation in Refineries & Power Plants

Oxidized Bitumen 85/25 is used to coat insulation slabs, pipes, and HVAC ducts. It acts as a thermal barrier and moisture seal, especially in:

  • Oil refineries

  • Petrochemical plants

  • Thermal power facilities

🧴 6. Bituminous Paints, Varnishes & Primers

Its high purity and hardness make it suitable for solvent-based paints, metal primers, and protective bituminous lacquers. It improves:

  • Film toughness

  • UV resistance

  • Water impermeability

These coatings are widely used in marine and industrial equipment.

🧪 Key Performance Characteristics

  • ✅ High Softening Point (85°C): Resists melting and deformation in hot climates

  • ✅ Low Penetration (25 dmm): Ensures mechanical strength and long-term hardness

  • ✅ Excellent Chemical Resistance: Withstands acids, alkalis, and salts

  • ✅ Non-Tacky Finish: Reduces dirt pickup, ideal for exposed coatings

  • ✅ Superior Adhesion: Binds well to steel, concrete, and masonry

  • ✅ Low Water Absorption: Optimal for foundation and tank applications

❓ FAQs About Oxidized Bitumen 85/25

❓ What does 85/25 mean in oxidized bitumen?

It represents a softening point of 85°C and a penetration value of 25 dmm, indicating high heat resistance and rigidity. It’s suitable for coatings, sealing, and protective linings.

❓ Can Bitumen 85/25 be used in road construction?

Yes, especially in joint sealing, crack filling, and bituminous pre-coats. However, it’s not ideal for flexible asphalt mixes due to its hardness.

❓ Is Bitumen 85/25 resistant to chemicals?

Absolutely. It withstands alkaline, acidic, and saline environments, making it perfect for chemical storage and waste treatment applications.

❓ How is 85/25 different from 75/30?

Oxidized Asphalt 85/25 has a higher softening point and lower penetration, making it harder and more suitable for thermal and chemical exposure, while 75/30 is more flexible and versatile.

❓ How should Bitumen 85/25 be stored?

It should be stored in dry conditions, away from UV exposure and humidity. When kept properly, its shelf life exceeds 5–10 years without degradation.

❓ What packaging options are available?

Bitumen 85/25 is typically packaged in:

  • 25 kg kraft paper bags

  • 50 kg meltable PE bags

  • 180 kg steel drums

  • Bulk blocks on pallets

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🔍 Conclusion

Oxidized Bitumen 85/25 is a high-performance, hard-grade bitumen designed for specialized industrial use. Its elevated softening point and rigid structure make it particularly suitable for coatings, chemical containment, waterproofing, and joint sealing.

Whether you’re securing pipeline infrastructure, insulating thermal equipment, or lining containment vessels, Bitumen 85/25 delivers unmatched durability, chemical resistance, and weather resilience. With a proven track record across construction, oil & gas, and industrial sectors, it remains a vital material for demanding technical applications.

📣 Call to PEAK UNIVERSAL BUSINESS LTD: Request Oxidized Bitumen 85/25 in Bulk

📦 Available in Kraft Bags, Drums & Blocks

🌍 Worldwide Shipping & Logistics Support

🧪 Custom Formulations Available Upon Request

📞 Get a Technical Datasheet or MSDS Today

✅ Contact our experts today to get the highest-quality Blown Asphalt 85/25—manufactured, tested, and delivered to meet your exact specifications.

✅ We in PEAK UNIVERSAL BUSINESS LTD. provide fast shipping, technical guidance, and full compliance with international standards.

📞 Request a quote now or speak with our team for more information.

📧 Email: [email protected] 

📞 Phone: +971 4 878 2031

🌐 Visit: BlownAsphalt

🌍 PUBLtd. as Your trusted Supplier & Partner in high-performance bitumen solutions.

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