Title of article :
Laboratory evaluation of strain controlled fatigue criteria in hot mix asphalt
Author/Authors :
Khiavi، نويسنده , , Alireza Khavandi and Ameri، نويسنده , , Mahmoud، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Pages :
6
From page :
1497
To page :
1502
Abstract :
The fatigue lives of hot mix asphalt are affected by the test method and the loading mode. In the strain controlled mode, the 50% reduction in initial stiffness is widely used by asphalt professionals. Also, different approaches based on dissipated energy concept have been used to define the fatigue life of hot mix asphalt mixtures. In this research study, the 50% reduction in initial stiffness, Energy Ratio and Rate of Dissipated Energy Change approaches are used to depict fatigue life and compared with the observed failure point in beam fatigue test. The beam fatigue tests were conducted in accordance with AASHTO T321 using 1000 microstrain and semi sinusoidal loading at 10 Hz. The results show that the 50% reduction in initial stiffness underestimates fatigue life of hot mix asphalt mixtures. According to the tests results, the fatigue life corresponding to 65% reduction in initial stiffness is close to the observed failure point.
Keywords :
Asphalt mix , fatigue cracking , bending beam , Dissipated Energy , Stiffness reduction
Journal title :
Construction and Building Materials
Serial Year :
2013
Journal title :
Construction and Building Materials
Record number :
1635368
Link To Document :
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