Rheology of warm mix asphalt binders with aged binders

摘要

This study addresses the Theological investigation of properties of warm mix asphalt (WMA) binders containing long-term aged binders. The recycled binders with the additives were produced using two (i.e., zeolite Aspha-min~? and wax Sasobit~?) of the available warm asphalt processes. The main rheological factors selected in this study were relationships between loading and response as a function of time, temperature and frequency using a Bohlin Dynamic Shear Rheometer II. The results indicated that the addition of Sasobit~? into recycled binders played an important role in determination of the binder properties evaluated in this study. The use of lower performance grade (PC) as a virgin binder (PC 58-28 in this study) was critical on offsetting the change of rheological binder properties due to the warm additives and the aged binders.