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    Characterization of Alaskan Hot-Mix Asphalt containing Reclaimed Asphalt Pavement Material

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    Author
    Liu, Jenny
    Zhao, Sheng
    Li, Lin
    Keyword
    Recycled Asphalt Pavement
    Dynamic Modulus
    Flow Number
    Low Temperature Cracking
    Cracking
    Cracking Temperature
    Thermal Stress
    Metadata
    Show full item record
    URI
    http://hdl.handle.net/11122/9576
    Abstract
    In order to properly characterize Alaskan HMA materials containing RAP, this study evaluated properties of 3 asphalt binders typically used in Alaska, PG 52-28, PG 52-40, and PG 58-34, and 11 HMA mixtures containing up to 35% RAP that were either produced in the lab or collected from existing paving projects in Alaska. Various binder and mixture engineering properties were determined, including true high binder grades, complex modulus (|G*|), and phase angle (δ) at high performance temperatures, MSCR recovery rate and compliance, BBR stiffness and m-value, DTT failure stress and strain for binders, and dynamic modulus, flow number, IDT creep stiffness and strength for mixtures. Binder cracking temperatures were determined through Thermal Stress Analysis Routine (TSAR) software along with BBR and DTT data. Mixture cracking temperatures were determined with IDT creep stiffness and strength data. It was found that rutting may not be a concern with Alaskan RAP mix, while low-temperature cracking concerns may still exist in RAP mix in Alaska. A savings of $13.3/ton was estimated for a 25% RAP mix, with consideration of Alaskan situations. Many recommendations for future RAP practice and research are recommended based on testing results and cost analysis.
    Date
    2016-06
    Publisher
    Center for Environmentally Sustainable Transportation in Cold Climates
    Type
    Technical Report
    Collections
    CESTiCC Project Reports

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