Asphalt Mix Performance Tester(AMPT)

Asphalt Mix Performance Tester(AMPT)
  • NCHRP Project 9-29 developed commercial equipment which recommended three simple performance tests:
  1.  Dynamic Modulus – Absolute value of Complex Modulus
  2.  Flow Number – Number of repeated load cycles (repeated compressive stress pulses) corresponding to the minimum accumulation rate of change of permanent axial strain
  3. Flow Time – Constant load is applied to the sample and total deformation is observed.