Materiales de Construcción, Vol 67, No 327 (2017)

Ageing evolution of foamed warm mix asphalt combined with reclaimed asphalt pavement

M. Perez-Martinez, P. Marsac, T. Gabet, S. Pouget, F. Hammoum



The combination of high rates of reclaimed asphalt pavement (RAP) and warm mix asphalt (WMA) technologies is still ambiguous in terms of durability. With the aim of clarifying this issue, a study comparing a hot mix asphalt with a WMA prepared using the foaming process technology. Both mixes contain 50% of RAP and are submitted to a laboratory ageing procedure. The long term related performance of the mixtures is compared by means of complex modulus and fatigue testing. Penetration and ring and ball tests are undertaken on the recovered bitumens, as well as the ageing evolution, characterised by the Fourier Transform Infrared analysis. Finally, the Apparent Molecular Weight Distribution (AMWD) of the binders is calculated from rheological measurements using the δ-method. Results show a relation between ageing evolution and mechanical performance. After ageing, the overall tendencies are similar for both processes.


Durability; Rheology; Modulus of Elasticity; Fatigue; Modelization

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