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Multiple Stress Creep Recovery (MSCR)

The AASHTO T350 test is used in conjunction with specification AASHTO M 332, to determine the performance grade (Performance-Graded (PG) BinderA performance-based asphalt grading system intended to minimize the potential for rutting, fatigue cracking and thermal cracking as initially defined by Superpave under AASHTO M-320 and M-332 including later equivalents by ASTM, EN, DIN, etc.PG) of an asphalt binder. 

The method is designed to identify the presence of elastic response in an asphalt binder.  Non-recoverable CreepCreep은 일정한 힘 아래에서 시간과 온도에 따라 달라지는 소성 변형을 나타냅니다. 고무 화합물에 일정한 힘이 가해지면 가해진 힘에 인해 발생하는 초기 변형이 고정되지 않습니다. 변형은 시간이 지남에 따라 증가합니다creep 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.