Laboratory investigation on the effects of working temperatures on wax-based warm mix asphalt

The comparative laborator yinvestigat ion described inthis paper focuses onthe effects ofartificialwax asanadditive for warm mix asphalts (WMAs).The investigation was performed inthe Road Research Lab- oratory atthe Politecnico diMilano,and ithas been divided into two main phases toevaluate the working temperat ures on:(i)comp action and volumetric parameters and (ii)the mechanical performance oftwo different asphalt mixtures for wearing courses.Results showed that mixtures containing wax are stiffer atlow temperatures and produce greater deformations than traditional mixtures,whereas wax does not significantlyinfluencefatigue resistance at20C.