INFLUENCE OF RECYCLED AGGREGATES ON THE RESISTANCE OF BITUMINOUS CONCRETE IN THE PRESENCE OF ADDITIVES

The design of a safe and respectful roadway to the environment must meet the users' requirements in the present without compromising those of future generations. Under the traffic action, always more constraint and the climatic blitzes, the pavements crumbling occurs rapidly, which leads to severe impairments that are reflected on the surface layers: rutting, cracking, substances rejection, polishing and pulling out the aggregates on surface. This situation often involves the renovation of the surface's layers. It is, therefore urgent to appeal to a new vision of pavement design based on optimizing the use of local materials, non-renewable, and respect for the environment. The recycling of bituminous substances are one of the relevant solutions. It has the advantage of reusing building materials by mixing them with a proportion of refined ones to achieve the required performance. This assignment researches for different rates of coated aggregates, the effects of manufacturing temperature and blending time in the mixing of the constituents during production as well as the additive plastomers of polyolefins on the improvement of the recycled asphalt rutting. Rutting is one of the most encountered degradation phenomena in the Algerian roads. The formulated hypothesis used here assumes that the elastomer polyolefins additive have an influence on the mechanical performance (rutting) of the recycled asphalt and also on the rate of the used asphalt aggregates. To justify this hypothesis it is mandatory to go through the manufacture of the asphalt with different rate of asphalt aggregates. To reduce the number of experimental tests necessary for this study, we used the experimental approaches method.