The Effect of Crumb Rubber on Properties of Asphalt Mix by Dry Process
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Abstract
the use of crumb rubber modifiers by dry process
is not used extensively in asphalt applications as the wet
process. This study aims to investigate the effect of crumb
rubber modifiers on properties and performance of asphalt
mix by dry process. Thus, a set 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 assessed
by using the Marshall Stability test, the wheel tracking test
and the moisture 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 that an addition of 2% of CR to unmodified AC16
gives the most satisfactory results among other rubberized
mixtures.
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