Modelling the rheological properties of bituminous binders using the 2S2P1D Model

This study evaluates the suitability of the 2S2P1D Model to describe the rheological properties of a large database of bituminous binders held by the Nottingham Transportation Engineering Centre. This database includes more than 60 different combinations of unmodified bitumen, polymer-modified bitumen and bitumen–filler mastics, unaged and aged samples. The 2S2P1D Model is found to be able to satisfactorily describe the linear viscoelastic rheological (LVE) properties of binders over a wide range of temperatures and frequencies. A comparison between measured and descriptive complex modulus and phase angle data was done using a graphical method and goodness-of-fit statistics. Except for the unaged polymer-modified bitumens, all tested samples show good agreement between the measured and descriptive data.