Bitumen 35/50 – Hard Penetration Grade Bitumen for Heavy-Duty Roads

Bitumen 35/50 is a hard penetration grade paving bitumen with a penetration value of 35–50 (0.1mm at 25°C) and a softening point of 52–60°C. This grade is manufactured from vacuum-distilled crude oil for high-stiffness road applications.

 Bitumen 35/50 is commonly used in high-traffic highways and expressways, heavy-duty asphalt pavements, industrial roads, airport runways, and hot or warm climate regions where pavement stability under heat is critical.

Bitumen 35/50 offers excellent rutting resistance, high load-bearing capacity, ductility above 100cm, and low loss on heating (max 0.2 wt.%), resulting in durable performance and long pavement service life in demanding conditions.

Bitumen 35/50 should be stored in heated, insulated tanks at controlled temperatures below its flash point of 250°C, with precautions to avoid overheating, moisture ingress, and contamination during handling.

Bitumen 35/50 supplied by Black Rock Bitumen is tested and certified to ASTM (D5, D36, D113, D92), EN, and AASHTO T102 standards, covering penetration, softening point, ductility, flash point, and spot test requirements.

Bitumen 35/50 is available in new steel drums, jumbo bags, and bulk shipment via Bitutainers or Bitubox, allowing flexible delivery for both small orders and large-scale infrastructure projects.

Bitumen 35/50 undergoes third-party pre-shipment inspection and batch testing — including specific gravity, penetration, softening point, and negative spot test verification — before loading, with FOB, CFR, and CIF delivery terms available.

 Bitumen 35/50 is harder and more rut-resistant than Bitumen 40/60, with a narrower penetration range (35–50 vs. 40–60 dmm) and a higher softening point, making Bitumen 35/50 better suited to heavier traffic and higher service temperatures.