عنوان مقاله [English]
Today, modified bitumen is used in the asphalt pavement, extensively. This has improved the properties of the asphalt mixture, including fatigue failure performance. Beside of these additives effect, a phenomenon called asphalt self-healing also increases the fatigue life of the mixture. Since there has not been extensive research on effect of self-healing, design fatigue life is usually considered to be less than the capacity of the mixture, and this action, in addition to adding cost, affects high temperatures performance or in other words, rutting performance. In this study, modified mixtures containing crumb rubber , styrene-butadiene-rubber, styrene-butadiene-styrene and polyethylene polymers were prepared in two groups of same bitumen and same void ratio and subjected to four-point fatigue and rutting tests. results showed that SBR elastomer polymer with increased bitumen elasticity provides the highest recovery capability (85%) for asphalt specimens. Subsequently, the SBS polymer has the highest fatigue life and 60% recovery capability.