AASHTO M 320-22 PDF

This specification covers asphalt binders graded by performance. Grading designations are related to the LTPPBind calculated maximum pavement design temperature and the minimum pavement design temperature. This specification contains Table 1 and Table 2. If no table is specified, the default is Table 1.

Table 2 incorporates AASHTO R 49 for determining the critical low cracking temperature using a combination of AASHTO T 313 and T 314 test procedures.

For asphalt cements graded by viscosity at 60°C, see AASHTO M 226.

AASHTO R 29 provides information for determining the performance grade of an asphalt binder.

For specifying performance-graded asphalt binder using Multiple Stress Creep Recovery (MSCR), see AASHTO M 332.