Étude de formulations en vue de maximiser le module d'un enrobé bitumineux à squelette granulaire optimisé au niveau de ses contacts gros-sur-gros

Abstract

The main objective of this master’s thesis is to formulate and characterize a high performance asphalt concrete using a formulating method based on coarse aggregate packing concepts. The high performance mix being proposed, which is named EBHP, is based on a stone matrix design allowing a good contact between coarse aggregates which are abundant enough to form a strong frame for the mix. The final mix contains glass particles which are carefully chosen in order to fill in the holes between coarse aggregates and get a very dense mixture while always trying to keep the coarse aggregates in contact with each others. The main advantage here of using glass particles is their availability in different specific sizes from the manufacturer, which isn’t always the case for other granular materials. This formulation concept allows the use of glass particles in proportions as high as around 25% of total mass of bituminous asphalt. The high solid density of the mix couple with low absorption of glass particles allow the use of less bitumen per ton of bituminous asphalt, which again can allow us to use a higher performance bitumen without affecting to much the cost of the final product when comparing to a more standard bituminous mixture. The final mix also contains hydrated lime which should increase the asphalt stiffness, fatigue resistance and other physical properties. In order to meet the expected goals of this study and characterize the high performance mixture, lab tests like gyratory compactor, rutting, Thermal Stress Restrained Specimen, fatigue and complex modulus (E*) were done on different specimens to evaluate what kind of performances the final mix can achieve. The tests results showed that the design approach can indeed lead to high performance properties for the tests being evaluated in this study.

Date	12 Aug 2015
Original language	French
Awarding Institution	École de technologie supérieure
Supervisor	Daniel Perraton (Supervisor) & Mathieu Meunier (Co-supervisor)