The field performance of dry process crumb rubber–modified (CRM) asphalt mixtures has been reported to be inconsistent with stripping and premature cracking on the surfacing. One of the concerns is that, because achieving field compaction of CRM material is difficult due to the inherent resilient nature of the rubber particle, nonuniform field compaction may lead to a deficient bond between rubber and bitumen. To assess the influence of compaction, a series of CRM and control mixtures was produced and compacted at two levels: 4% (low, optimum laboratory compaction) and 8% (high, field experience) air void content. The long-term durability, in regard to moisture susceptibility of the mixtures, was assessed by conducting repeated moisture conditioning cycles. Mechanical properties (stiffness, fatigue, and resistance to permanent deformation) were determined in the Nottingham Asphalt Tester. Results indicated that compared with conventional mixtures, the CRM mixtures, regardless of compaction effort, are more susceptible to moisture with the degree of susceptibility primarily depending on the amount of rubber in the mixture, rather than the difference in compaction. This behavior is different from that of conventional mixtures in which, as expected, poorly compacted mixtures were found to be more susceptible to moisture than were well-compacted mixtures.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Moisture Susceptibility of High and Low Compaction Dry Process Crumb Rubber–Modified Asphalt Mixtures


    Additional title:

    Transportation Research Record


    Contributors:


    Publication date :

    2010-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Structural Layer Coefficients of Crumb Rubber–Modified Asphalt Concrete Mixtures

    Hossain, Mustaque / Habib, Affan / Latorella, Todd M. | Transportation Research Record | 1997


    Performance evaluation of dry process crumb rubber-modified asphalt mixtures with nanomaterial

    Arabani, Mahyar / Tahami, Seyed Amid / Hamedi, Gholam Hossein | British Library Online Contents | 2018


    Structural Layer Coefficients of Crumb Rubber-Modified Asphalt Concrete Mixtures

    Hossain, M. / Habib, A. / LaTorella, T. M. et al. | British Library Conference Proceedings | 1997