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Enrobé à module élevé pour régions froides : de sa formulation à son intégration dans les méthodes de dimensionnement mécaniste empirique en considérant ses propriétés thermomécaniques et sa résistance en fatigue

Translated title of the thesis: High modulus asphalt concrete for cold regions: from its mix design to its integration in mechanistic empirical pavement design methods considering its thermomecanical properties and fatigue resistance
  • Samuel Proteau Gervais

Student thesis: Master's thesis › Master in Engineering: Construction Engineering

Abstract

The main goal is to illustrate the superiority of the 14 mm high modulus asphalt concrete (HMAC-14) in comparison to standard base course HMAs (Hot Mix Asphalt). The thermomechanical properties and their integration in mechanistic empirical (ME) pavement design methods are used as proof. Firstly, the HMAC-14 was formulated, validated and mechanically characterized. As expected, the HMAC-14 shows great performances: high rutting resistance, high rigidity (E*) and high fatigue resistance. Rigidity and fatigue resistance are key elements to ME pavement design methods. Secondly, the impact of the type of solicitation signal (sine vs haversine) and the frequency on the fatigue resistance of the HMAC-14 are studied because each ME pavement design method refers to a specific fatigue test. When the deformation amplitude is correctly defined, the type of solicitation signal does not impact the fatigue resistance. A reduced frequency leads to higher fatigue resistance. Thirdly, links and relations are established between the French (Alizé-LCPC) and the American (AASHTOWare Pavement ME Design) ME pavement design methods. The use of these links leads to similar pavement designs at the millimeter scale. Lastly, the respective use of the French and the American ME pavement design methods illustrates the thickness reductions the HMAC-14 procures comparatively to a standard base course HMA. Both methods produce designs at the same scale of magnitude and clearly show the important thickness reduction the HMAC-14 procures. To conclude, the HMAC-14 is a viable and performing alternative to standard base course HMAs leading to either thinner pavement structures (at same life durations) or more durable pavement structures (at same thicknesses). The proof is based on the mechanical performances of the HMAC-14 and the use of ME Pavement design methods.
Date10 Dec 2019
Original languageFrench
Awarding Institution
  • École de technologie supérieure
SupervisorDaniel Perraton (Supervisor)

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