101-A
De-Vulcanized Tire Rubber Asphalt Additive
Abstract
Our previous efforts were directed towards producing a De-Vulcanized Tire Rubber (DVTR) suitable for modifying asphalt for use in sealants and roofing. Our present work, however, has successfully produced a DVTR modified asphalt binder that meets fully Performance Grade (PG) binder specifications including hot storage stability that has been a challenge to Crumb Rubber Modified (CRM) Asphalt. Test results show the DVTR modified PG grade binders are comparable to those modified with Styrene Butadiene Styrene copolymers (SBS). Laboratory evaluations at Asphalt Rubber Technology Services (ARTS) division of Glenn Civil Engineering Department of Clemson University and National Center for Asphalt Technology (NCAT) will be presented in this paper to illustrate these findings.