Abstract
Asphalt mixtures are being used in road construction more and more, to the deficit of concrete surfaces. Due to the additives as well as the new technologies being used to obtain asphalt mixtures, the results are vastly improved which can lead to a better behavior in day to day situations, even under heavy traffic. This study means to show the way in which changing the binder influences the properties of the mixture. So, the chosen binder course, type BAD 22.4, will use different types of binder (bitumen), more specifically: a 50/70pen bitumen; a 50/70pen bitumen modified with flexible semi-rigid polymers and a PmB 45/80-65 bitumen, modified with polymers by crosslinking. The asphalt mixtures will be characterized by their volumetric properties, Marshall Characteristics and their behavior to dynamic tests. The results presented in the form of charts and tables were obtained in the Road Laboratory of the Technical University of Civil Engineering of Bucharest. The conclusion that can be drawn is that depending on the type of binder used, the results obtained differ with a noted improvement of the resistance to permanent deformation and creep, in the mix which uses the binder modified with polymers by crosslinking technology.
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