The healing phenomenon has been noted by pavement engineers for years, but its relation to hot-mix asphalt (HMA) fatigue behavior is still far from clear. This study conducted an analysis of healing and HMA fatigue behavior by introducing a specifically designed fatigue-healing test. These results help explain the differences in fatigue behavior at normal and low strain levels. An approach using the ratio of dissipated energy change, which is based on energy concepts, is used in this study. The results show that healing does exist, and its effect on fatigue life can be indicated by an energy recovery per second of rest period. The effect of healing is more prominent at low strain levels or in very long rest periods. At low strain conditions, the dominance of healing compared with the very low external load damage, considering the energy equilibrium, can result in full damage recovery. This full recovery of energy explains the existence of a fatigue endurance limit, below which HMA materials tend to have extraordinarily long fatigue lives that, as is shown, can be related to healing. The testing conducted clearly shows why polymer modification may extend the fatigue life in the field even though laboratory testing may show minimal differences compared with the neat binder test results.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Dissipated Energy Approach to Study Hot-Mix Asphalt Healing in Fatigue


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board


    Contributors:


    Publication date :

    2006-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Dissipated Energy Approach to Study Hot-Mix Asphalt Healing in Fatigue

    Carpenter, Samuel / Shen, Shihui | Transportation Research Record | 2006



    Energy dissipated during braking

    Newcomb, T.P. | Tema Archive | 1980


    Application of Dissipated Energy Concept in Fatigue Endurance Limit Testing

    National Research Council (U.S.) | British Library Conference Proceedings | 2005


    A dissipated energy approach for flow number determination

    Saqer, Hamzeh / Nazzal, Munir D. / Al-Khasawneh, Mohammad et al. | TIBKAT | 2021