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Cold in-place recycle phase III, mix design.
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  • Abstract:
    This project’s purpose is to revise the UDOT accepted design methods for Cold In-Place Recycling so that they

    better reflect field behavior and target the desirable attributes of the material. The previous design process failed to

    adequately predict behavior related to temperature as well as did a poor job of characterizing return to traffic

    performance. This project calls upon both laboratory observation and field experience to obtain optimization

    between rutting, stripping and intermediate temperature cracking. It also ties down the constructability and return to

    traffic parameters required by maintenance of traffic constraints. The new design process continues the use of

    Marshall Stability and Tensile Strength Ratio to set rutting and stripping resistance. It further uses Semicircular

    bending to set an intermediate temperature cracking parameter. New compaction/temperature and

    compaction/gradation relationships are developed to help determine final density and emulsion targets. A new test

    for emulsion set time is developed to prequalify emulsion construction performance. Modified BBR and Elastic

    Recovery testing is used to establish cold temperature properties of recovered binder.

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