Dalle prove tradizionali allo Zero Shear Viscosity, la reologia dei leganti bituminosi

At the beginning of asphalt rheology, the tests used for the characterization of bitumen were empirical, based primarily on the experience of technicians. These traditional tests were not able to measure the physical asphalt binder properties directly related with their service life performance. In 1987, the Strategic Highway Research Program (SHRP) brought some new tests for the so called performance rheology aiming to measure properties directly related to the field performance, under rigorous engineering principles. However, a number of recent studies have shown that some SHRP parameters are not fully representative of the PmBs rheology.