Experimental Study on Shear Fatigue Behavior and Stiffness Performance of Warm Mix Asphalt by adding Synthetic Wax

Christophe Petit (1) , Anne Millien (1) , Francesco Canestrari (2) , Valter Pannunzio (2) , Amadeo Virgili (2)

1 GEMH - Groupe d'Etudes des Matériaux Hétérogènes
2 Dipartimento ICEA

Synthetic waxes produced by standard and registered processes may be used to manufacture Warm Mix Asphalt (WMA), which is a modified asphalt concrete produced, applied and compacted at temperatures below those typically required. This feature leads to environmental benefits, such as reduced energy consumption, gas and fume emissions, as well as to economic/operational advantages, such as lower production costs and greater hauling distances for extended construction seasons with tighter schedules. The present article serves to compare the mechanical performance of a WMA produced by adding synthetic wax with a traditional Hot Mix Asphalt (HMA) specimen, in terms of shear fatigue response and both complex and stiffness moduli. The experimental results and related modeling work demonstrate that adding synthetic wax into the WMA composition does not hinder either the destructive or non-destructive performance of an HMA, and this finding is corroborated by respectively measuring fatigue life and stiffness.

Mots clés: Bituminous material; shear mode; fatigue; Stiffness; Warm Mix Asphalt; Complex modulus; Hot Mix Asphalt; Lifetime

Domaines: Matériaux et structures en mécanique [physics.class-ph]; Matériaux et structures en mécanique [physics.class-ph]

Christophe Petit, Anne Millien, Francesco Canestrari, Valter Pannunzio, Amadeo Virgili. Experimental Study on Shear Fatigue Behavior and Stiffness Performance of Warm Mix Asphalt by adding Synthetic Wax. Construction and Building Materials, 2012, 34, pp.537-544. ⟨10.1016/j.conbuildmat.2012.02.010⟩. ⟨hal-00678459v2⟩