Unifying asphalt rheological data using the material volumetric-flow rate

The material's volumetric-flow rate (MVR) (cm(3)/10 min) through a predefin ed die under conditions of constant temperature and stress has been used fo r obtaining unified curves of fundamental rheological properties such as \G *\, G " and \G*\/sin delta versus frequency in the case of six unmodified a sphalts. It has been shown that there is a theoretical basis for the unific ation and that the unified curves have far-reaching implications. Because M VR is so simple to determine quite accurately on a relatively inexpensive, easy-to-use flow measurement device, this parameter can be generated on pav ing sites or at refineries, rather than in research laboratories as is the case with fundamental rheological parameters. The MVR can then be used as a n excellent indicator of the fundamental rheological parameters through the use of the unified curves.