Pars Bitumen’s Oxidized Bitumen 85/35

 

Description: 

At Pars Bitumen, we are proud to offer our premium grade Oxidized Bitumen 85/35, designed for demanding construction and industrial-use scenarios. This blown bitumen variant (also called air-blown or oxidized asphalt) is produced by introducing hot air into penetration-grade bitumen, yielding improved softening point and lower penetration — which means increased hardness, better thermal stability and enhanced durability.
The “85/35” designation refers to a softening point around 85 °C and a penetration grade approximately 35 dmm (desi-millimetres) at 25 °C.
In this article, we’ll cover its specific features, applications, why choose Pars Bitumen, and provide you with a robust article structure suitable for website publication.

Specific Features of Oxidized Bitumen 85/35

Here are the key technical characteristics and performance benefits:

High Softening Point (~85 °C): This ensures the bitumen remains solid and stable under elevated temperatures, reducing flow or deformation in hot ambient/operating environments.

Moderate Penetration (~35 dmm): Lower penetration means the bitumen is harder, offering greater load-bearing capacity, better resistance to shear and improved mechanical performance.

Improved Thermal & Weather Stability: Because of the oxidation process, the binder shows reduced sensitivity to temperature fluctuations and greater durability against UV, heat, and aging.

Excellent Adhesion to Substrates: Suitable for bonding to metal, concrete, membranes and other construction materials, making it ideal for coatings, waterproofing layers, and protective linings.

Waterproofing and Corrosion Resistance: The product is tailored for applications requiring moisture-barrier performance and resistance to environmental degradation.

Versatile Packaging & Supply Options: Available in formats such as kraft bags, meltable plastic bags, drums or bulk, enabling flexible logistics and convenient handling in projects of varying scale.

 

 

Applications of Oxidized Bitumen 85/35

This grade serves a wide spectrum of construction and industrial needs. Below are major application categories:

1. Roofing & Waterproofing

Used in hot-applied or torch-applied modified bitumen sheets, coatings, and roof membranes thanks to its high softening point and durability.

Suitable for flat roofs, basement waterproofing, ponds, tunnels and other below-grade structures.

Because of its hardness and water-resistance, it helps extend the life of waterproofing systems.

2. Pipe Coating & Corrosion Protection

Ideal for coating steel or ductile-iron pipes in oil & gas, water-supply or industrial networks. Its adhesion and resistance properties make it a top choice.

Used in joint coatings, anticorrosion mastics, and protecting infrastructure elements exposed to chemical or soil environments.

3. Industrial Flooring, Adhesives & Insulation

As a base binder in mastics, adhesives, waterproof flooring and insulation panels.

Utilised in manufacturing of bituminous paints for metal corrosion protection, in electrical laminates, synthetic turf backing, and even in rubber/plastic manufacturing.

4. Hydraulic & Civil Works

Used in canal linings, dam waterproofing, concrete protection, sealing expansion joints, and embankment coatings due to its thermal/structural strength.

Also used in pavements or overlays where a harder, more stable binder than regular road bitumen is required.

 

 

Why Choose Pars Bitumen’s Oxidized Bitumen 85/35?

Quality Assurance: We adhere to ASTM/EN test methods (e.g., ASTM D36 for softening point, ASTM D5 for penetration) to ensure conformity.

Technical Support: Pars Bitumen provides full technical data sheets, guidance on application, handling and installation to ensure you get optimal performance.

Global Distribution: Whether you’re operating in the Middle East, Central Asia or farther, our logistics and packaging formats are tailored for export and project-scale delivery.

Cost-effectiveness & Longevity: Because the material is engineered for durability, your investment in Oxidized Bitumen 85/35 translates into lower maintenance, fewer replacements and better lifecycle value.

 

 

Handling & Storage Tips

When heating for application, ensure proper temperature control: avoid overheating and maintain uniform temperature to prevent degradation.

Substrate preparation is crucial: surfaces must be clean, dry and free of debris or curing compounds to ensure proper adhesion.

For storage: protect from moisture and repeated heating/cooling cycles to preserve binder quality over time.

Follow all safety standards and protective equipment guidelines when handling hot bitumen.

 

 

Conclusion

In summary, Pars Bitumen’s Oxidized Bitumen 85/35 is a high-performance, reliable solution for demanding construction and industrial applications. Its high softening point, robust mechanical strength and versatile application range make it an excellent choice for waterproofing, roofing, pipe coatings, civil infrastructure and beyond.
By choosing this grade from Pars Bitumen, you’re investing in a product engineered for longevity, performance and value — ensuring your projects stand the test of time.
We invite you to contact us for technical data sheets, sample requests and logistical support. Let’s build with confidence together.

 

Contact Pars Bitumen:

🌐 Website: www.parsbitumen.com
📧 Email: sales@parsbitumen.com
📞 WhatsApp: +98 912 387 9127

 

Analysis bitumen 85/35  PARS BITUMEN

Bitumen 85/35	Test method	Unit	Specification
Specific gravity @25/25 C	ASTM D70	(Kg/m3)	1.05 approx.
Penetration @ 25°c	ASTM  D5	mm/10	30/40
Softening point °c	ASTM  D36	°C	80/90
Ductility @25 °c	ASTM  D113	Cm	1.5min
Loss on heating(wt) %	ASTM  D6	Wt. %	0.2 max
Flash point °c	ASTM D92	°C	250 min
Solubility is CS2(wt) %	ASTM  D4	Wt. %	99.5 max
Spot test	A.A.S.H.T.O 102	—	Negative

 

Written and Gathered by Pars Bitumen Company