Effect of Recycled Asphalt Aggregates on the Rutting of Bituminous Concrete in the Presence of Additive

摘要

Under the traffic action, the pavement crumbling occurs rapidly, which leads to severe impairments that are reflected on the surface layers: rutting, cracking, substances rejection,polishingandpullingouttheaggregatesonsurface. 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 mate- rials, nonrenewable, and respect for the environment. The recycling of bituminous substances is 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 manufac- turing temperature and blending time in the mixing of the constituents during production as well as the additive (pow- der of rubber) on the improvement of the recycled asphalt rutting. Rutting is one of the most encountered degradation phenomenaintheAlgerianroads.Theformulatedhypothesis used here assumes that the additive has an influence on the mechanicalperformance(rutting)oftherecycledasphaltand also on the rate of the used asphalt aggregates. To justify this hypothesis, it is mandatory to go through the manufacture of theasphaltwithdifferentrateofasphaltaggregates.Toreduce thenumber ofexperimental testsnecessary forthisstudy,we used the experimental approaches method ANOVA.