FAQ: What is Oxidized Bitumen 85/30?

❓ What is Oxidized Bitumen 85/30?

🧪 Blown Asphalt 85/30 is a semi-solid industrial-grade bitumen made by blowing air through hot penetration bitumen. The number “85” shows its softening point (85°C), while “30” refers to its penetration value (30 in 1/10 mm). This grade offers excellent heat resistance, aging stability, and firm adhesion, making it suitable for demanding industrial use.

❓ Where is Oxidized Bitumen 85/30 typically used?

🏗️ This bitumen grade is widely used in roofing membranes, pipe coatings, electrical cable insulation, and chemical-proof linings. It performs well in projects that involve continuous heat, moisture, or pressure. Due to its thermal reliability, engineers often choose it for industrial sealing and protective layers.

❓ What are the key advantages of 85/30 over softer grades?

🔍 Compared to softer grades like 75/25 or 75/30, Blown Asphalt 85/30 provides a higher melting point and better structural firmness. It doesn’t deform easily under heat, which makes it ideal for surfaces that remain static under load. The material is also less temperature-sensitive, offering stable performance in extreme climates.

❓ Is Blown Asphalt 85/30 reliable for hot climate applications?

🌡️ Yes, it is highly reliable. The high softening point ensures the bitumen remains stable even under intense sunlight or industrial heat sources. As a result, the material avoids cracking, flowing, or softening, which helps extend the service life of the surface it’s used on.

❓ How do professionals evaluate the quality of 85/30?

📊 Engineers assess quality through standardized tests, including penetration, softening point, ductility, and specific gravity. These results help determine if the product meets technical and environmental demands. Most suppliers follow international standards like ASTM or EN to ensure consistency and safety.