Assist lec. Fatin Hashim + Assist lec. Alaa Hussein
Abstract
Rutting was characterized as a longitudinal surface depression that develops in a roadway's wheel pathways
due to continuous traffic loads. Throughout the pavement's operational life, it builds up gradually with little
permanent deformations with every load application. Rutting of hot mix asphalt (HMA) pavements at or
around intersections are fairly prevalent in hot and cold climes. Given that HMA loses rigidity as pavement
temps rise, the issue is undoubtedly worse in warm areas than in cold ones. Therefore, this project examines
the impact of adding crumbed rubber to the hot asphalt mixture. However, the optimum amount of the binder
used in the reference mixture without crumb rubber (CR) and the mixture that has (5, 10, 15, and 20) % of
crumbed rubber was identified by utilizing. The indirect tensile tests were performed on samples to identify
the influence of adding crumbed rubber on the features of the asphalt mixes. The optimum asphalt content
achieved conditions is 4.5%. The results indicated that CR increases stability and stiffness while adding
crumbed rubber into asphalt negatively influences bulk density.