Application of dispersant to slow down physical hardening process in asphalt binder

Physical hardening in asphalt binder is recognized as one of the main factors leading to premature and excessive cracking in cold regions and high-altitude areas. To slow down the physical hardening process in asphalt binder, octyl aniline (OA), which is a commonly available non-ionic dispersant, was added to the asphalt binder. The effectiveness of OA in retarding the physical hardening process of the base asphalt binder was evaluated with an...