Oxidized
Bitumen 75/35
Petra Oil’s Oxidized Bitumen 75/35 is a flexible, semi-solid oxidized bitumen designed for use in a wide range of construction and industrial applications. With a softening point of 75°C and a penetration value of 35 dmm, Bitumen 75/35 is ideal for situations where moderate heat resistance, enhanced elasticity, and durability are essential.
Produced via the air-blowing process, this grade has modified rheological properties, giving it better temperature tolerance and chemical resistance compared to conventional bitumen. Bitumen 75/35 is frequently used in light roofing systems, damp-proofing membranes, asphalt-based mastics, and vibration-damping applications. Its performance in dynamic structures and environments with regular temperature cycling makes it especially valuable in infrastructure and light industrial settings. In compliance with ASTM D36 and D5, this product meets global quality standards and ensures consistent performance across different climatic and structural conditions.
Key Specifications:
- Softening Point: ~75°C
- Penetration: ~35 dmm at 25°C
- Flash Point: ≥240°C
- Ductility at 25°C: ≥3 cm
- Solubility in CS₂: ≥99%
- Loss on Heating: ≤0.2%
Main Applications:
- Light-duty roofing and waterproofing systems
- Damp-proofing in basements and substructures
- Expansion joint fillers in building facades and bridges
- Anti-vibration pads and insulation compounds
Key Benefits:
- Good Workability and Flow: Easily melted and applied using conventional tools.
- Flexible yet Durable: Accommodates minor movement and resists fatigue cracking.
- Stable in Varying Temperatures: Performs well in moderately hot and cool conditions.
- Long-Term Resistance: Protects against water ingress, UV degradation, and oxidation.
Specification
No |
Description |
Unit |
75/35 Grade |
Test Method |
|---|---|---|---|---|
1
|
Specific Gravity @ 25°C
|
Kg/Cm3
|
1.05 aprx
|
ASTM D70
EN 15326
|
2
|
Penetration @ 25°C
|
MM/10
|
30/40
|
ASTM D5
EN 1426
|
3
|
Softening Point °C
|
°C
|
70/80
|
ASTM D36
EN 1427
|
4
|
Loss on Heating (wt) %
|
WT %
|
0.2 Max
|
ASTM D6
EN 13303
|
5
|
Flash Point °C
|
°C
|
250 Min
|
ASTM D92
EN ISO 2592
|
6
|
Solubility is CS2 (wt) %
|
WT %
|
99.5 Min
|
ASTM D4
EN 12592
|
7
|
Spot Test
|
@
|
Negative
|
AASHOT 102
|
