Evaluation Of Polymer Modified Asphalts Containing Warm Mix Additives In Rheology
Free (open access)
471 - 478
H.-S. Kim, S.-J. Lee, S. N. Amirkhanian & T.-S. Park
Polymer modified asphalt (PMA) binders can be utilized using warm mix asphalt (WMA) technologies in order to aim for the green highway construction by lowering construction temperatures and toxic by-products (i.e., CO2, smoke, and odor). This paper focused on a rheological investigation of three PMA binders, graded as PG 76-22, containing two warm additives (Aspha-min® and Sasobit®) available commercially. 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 suggested that the two warm additives positively influenced the performance of PMA binders. In particular, the use of Sasobit® showed the enhanced rutting resistance properties at high pavement temperature and more elastic properties at lower temperatures. Keywords: PMA binders, WMA, rheology.
PMA binders, WMA, rheology