Multiple Stress Creep Recovery (MSCR)

The AASHTO T350 test is used in conjunction with specification AASHTO M 332, to determine the performance grade (PG) of an asphalt binder. The method is designed to identify the presence of elastic response in an asphalt binder.  Non-recoverable creep compliance (Jnr) has been shown to be an indicator of the resistance of an asphalt binder to permanent deformation under repeated load (rutting). This test is typically performed immediately after AASHTO T 315 and can be performed on the same RTFO-conditioned sample.

ASTM D7405 and EN 16659 are examples of other standard bodies’ version of MSCR which are equivalent or based on AASHTO T350.