A number of bitumens of different origin, type, and composition (straight run, visbroken, blown, aged, rejuvenated and rock asphalts) were compared to show how non-conventional techniques may be used in solving practical problems relating to pavement performance properties, and in recognizing bitumens of different origins. Such techniques include differential scanning calorimetry (DSC) and nuclear magnetic resonance (NMR) in addition to the traditional tests. It is possible to obtain correlations which connect NMR or DSC parameters to the severity of the process by which VB bitumens were obtained.