The present work focuses on the determination of the stiffness and fatigue properties of hot mix asphalt (HMA) containing conventional and rejuvenated reclaimed asphalt pavement (RAP). Different mixtures of High Modulus Asphalt Concrete (HMAC) containing high rates of RAP (40 to 70 %) are characterized from laboratory testing in terms of general properties and mechanical performances: stiffness and fatigue resistance. The RAP mixes are compared to a control mix (without RAP) tested in the same conditions. All the remaining parameters (particle size distribution, binder and void content, mixing time and temperature) are maintained constant. The test results regarding workability, water sensitivity and rutting resistance are in agreement with the French specifications for all mixtures. Compared to the control mix, the use of RAP increases the rutting resistance whereas the rejuvenator improves the workability without negative effects on the rutting resistance. The stiffness modulus and the fatigue resistance are measured on standard trapezoidal specimens, by using a strain-controlled two-point bending test (2PB-TR). The experimental results show that, compared to the control mix, the use of RAP increases the stiffness modulus, reduces the phase angle of the mixes and increases the fatigue resistance. The use of rejuvenator (REGEFALT) produces a small decrease of the stiffness modulus and an increase of the fatigue resistance.

bituminous mixes, rejuvenator, mix workability, stiffness modulus, fatigue resistance.