FAQ: What is Oxidized Bitumen 90/40?

❓ What is Oxidized Bitumen 90/40?

🧪 Blown asphalt 90/40 is a semi-solid, air-blown bitumen with a softening point of 90°C and a penetration value of 40. Manufacturers increase its hardness and temperature resistance through oxidation. This process makes it ideal for projects that need both strength and moderate flexibility.

❓ Where can you use Oxidized Bitumen 90/40?

🏗️ You can apply Blown asphalt 90/40 in roofing membranes, steel pipe coatings, waterproofing, and insulation systems. Because it holds its shape under high heat, it performs well in hot climates. In addition, its moderate elasticity helps absorb small movements without cracking.

❓ How is 90/40 different from other oxidized grades?

🔍 This grade offers a middle ground between rigidity and flexibility. It’s softer than 90/10 or 90/15 but tougher than 85/25. As a result, it suits applications that need thermal stability without becoming too brittle or too soft.

❓ Can 90/40 handle high temperatures and heavy loads?

🌡️ Yes, Blown asphalt 90/40 resists deformation even under extreme heat and pressure. Its stable structure prevents melting, sagging, or softening. Therefore, it’s widely used in construction environments where heat exposure is constant.

❓ How do you ensure the quality of Oxidized Bitumen 90/40?

📊 Experts test it using methods like ASTM D36 for softening point and D5 for penetration. These tests confirm the material meets industry standards. Consistent quality checks also help ensure safe and long-lasting performance.