Developing unified rheological curves for polymer-modified asphalts - Part I. Theoretical analysis

Rheological data for polymer-modified asphalts are obtained by measurements on the dynamic shear rheometer (DSR) and expressed in terms of \ G* \, G " and \ G* \ / Sin delta versus frequency curves. In each case, the material's volumetric-flow rate MVR (in cc / 10 minutes) through a predefined die under conditions of constant temperature and stress can be obtained for the polymer-modified asphalts using a simple flow measurement device (FMD). A theoretical relationship between the fundamental rheological properties got from the DSR and the MVR obtained from the FMD shows that unified curves of viscoelastic properties of polymer-modified asphalts. can be obtained within a determined temperature range.