ABSTRACT
ABSTRACT: This work shows that adding polymers to asphalt binders improves the resistance of bituminous concrete to rutting and allows the design of surfacing layers with low thickness offering better performances and lower costs. The rheological behavior of three Algerian bitumens is studied. Experiments were carried out on pure asphalts characterized by different penetration classes (35/50; 50/70; 70/100). Black’s diagram shows that 35/50 pen bitumen is less likely to form wheel ruts at hot weather. 35/50 pen bitumen is then modified by 3, 5 and 7% of Ethylene Acetate Vinyl (EVA) polymer to manufacture Hot Mix Asphalt Concrete with an optimum bitumen content estimated at 6%. Marshall tests show that the highest stiffness and the better permanent deformation are obtained for 3% of EVA content.
