Bitumen AC20 Descriptions
Bitumen AC20 is a viscosity grade bitumen. Asphalt cement grade (AC) bitumen is one of the primary types of viscosity grade bitumen. This is a The majority of AC binders are used in hot applied surface treatments, however they also have additional applications such as pre-coating, tack coat, and recycling.
The AC nomenclature uses numbers to represent the stiffness or viscosity of the asphalt. As the number increases, the binder becomes stiffer/harder.
Polymer additives are designated (SBR for styrene-butadiene rubber, P for styrene-butadiene-styrene block copolymer, and TR for tire rubber). Asphalt cement application temperatures range from 300°F to 400°F, particularly for higher viscosity grades.
Bitumen AC20 Applications
Bitumen AC20 is a versatile alternative that may be used in a variety of applications, particularly in areas with moderate climates. Its applications include:
- Road construction projects, particularly in moderate climates.
- Production of asphalt primer and waterproofing materials.
- Creating hot mix asphalt for bases, pavements, and road building.
- Making bitumen emulsions, cutback bitumen, and modified bitumen grades.
Difference Between Bitumen AC20 & AC30
The main difference between Bitumen AC20 and AC30 is their viscosity, which affects how they perform under different temperature ranges. AC20 is less viscous than AC30 and is thus more workable and easier to use in moderate climates or where mixing and compaction are required to be easier. In contrast, AC30 is more viscous with greater stiffness and better resistance to rutting and deformation, especially in high-temperature regions or where there will be heavy traffic loading. AC30 is employed for roads and highways in warmer regions where the pavement needs to be more durable and long-lasting, while AC20 is used where the temperatures are modest and the conditions less extreme.
Packaging, Handling and Storage
Packaging: Typically packaged in barrels or tanks to maintain product integrity.
Handling: Adhere to safety protocols and use appropriate equipment to avoid accidents and spills.
Storage: Store in a cool, dry place away from direct sunlight and heat sources to preserve properties and prolong shelf life.
Specification
| Property | Units | AC-20 | TEST METHOD |
|---|---|---|---|
| Viscosity, 140°F (60°C) | P | 2000± 400 | ASTM D-2171 |
| Viscosity, 275°F (135°C), Min | cSt | 210 | ASTM D-2171 |
| Penetration, 77°F (25°C), 100g, 5sec, Min | 0.1 MM | 40 | ASTM D-5 |
| Flash point, Cleveland open cup, Min | °C | 232 | ASTM D-92 |
| Solubility in trichloroethylene, Min | %Wt. | 99 | ASTM D-2042 |
| Tests on residue from thin-film oven test: | |||
| Viscosity, 140°F (60°C), Max | P | 10000 | ASTM D-2171 |
| Ductility, 77°F (25°C), 5cm/min, Min | CM | 20 | ASTM D-113 |
