The Effect of Crumb Rubber on Properties of Asphalt Mix by Dry Process (original) (raw)

2019, The International Journal of Engineering and Technology Information

the use of crumb rubbermodifiersby dry process is notused extensively in asphalt applicationsasthe wet process.This study aims to investigate the effect of crumb rubber modifiers on properties and performance of asphalt mix by dry process. Thus, aset of asphalt mixtures containing various percentages of crumb rubber modifiers mixed by the dry process were tested. Moreover, the effect of modifying conventional asphalt mixture with crumb rubber polymers was evaluated. In addition, a comparative assessment was made to evaluate rubberized mixtures and unmodified bitumen mixture. The mixtures were assessedby using the Marshall Stabilitytest, the wheel tracking test and themoisture susceptibility test. The study revealed that an addition of crumb rubber modifiers to conventional asphalt mixture enhances pavement stability and increases its resistance to rutting and moisture damage. The study concludes thatan addition of 2% of CR to unmodified AC16 gives the most satisfactory results among other rubberized mixtures.