Development and evaluation of asphalt technologies utilizing renewable resources and innovative pavement systems

Abstract

Asphalt binder is typically modified with poly(styrene-butadiene-styrene) (SBS) type polymers to improve its rheological properties and performance grade. The elastic and principal component of SBS polymers is butadiene. For the last decade, butadiene prices have fluctuated and significantly increased, leading state highway agencies to search for economically viable alternatives to butadiene based materials. This paper reports the recent