Comparison between various bituminous binders modified with crumb tyrerubber

The aim of this paper is to show how the rheology, the performance and the storagestability of different bituminous binders, obtained from two bitumens with differentasphaltenes content, change their properties when they are modified with recycled tyre crumbrubber. Physical, chemical and performance characterisation followed by rheological andstorage stability analyses have been undertaken as the basis for the comparison. The resultsof the investigation indicate that bitumen with lower asphaltenes content is more influencedby the modification with the rubber. However, the modification of the bitumen with the higherasphaltenes content gives a binder with better performance and storage stability. Moreover,results shows that the addition of a certain amount of oil extender to the bitumens reduces theeffect of the modification and has no positive effect on storage stability.