Highway Quality Standards
AASHTO Bitumen Standards
Review AASHTO bitumen standards and test codes used in U.S. highway construction and performance grading systems.
U.S. Standards for Highway Performance
American Association of State Highway and Transportation Officials (AASHTO) Bitumen Standards
The American Association of State Highway and Transportation Officials (AASHTO) establishes standards for bitumen testing and classification in highway materials.
Standard Codes for Bitumen Properties
Property | AASHTO Code | Description |
Penetration | AASHTO T49 | Defines grade consistency |
Softening Point | AASHTO T53 | Measures softening temperature |
Ductility | AASHTO T51 | Evaluates elongation |
Viscosity | AASHTO T201 / T202 | Defines flow resistance |
Flash Point | AASHTO T48 | Determines ignition temperature |
Methods by Bitumen Type
- Performance Grade Bitumen: AASHTO M320
- Emulsion Bitumen: AASHTO T59
- Cutback Bitumen: AASHTO T78