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Comparison of "saw and seal" procedure and performance grade binder to minimize thermal cracking : interim report - fourth year/final report.
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  • Abstract:
    In an effort to compare performance and cost effectiveness of the “Saw and Seal” procedure and

    Performance Grade (PG) binders, the Maine Department of Transportation (MaineDOT) constructed an

    experimental project in Weston, Maine during the fall of 2000. Both the Saw and Seal method and PG

    binder are designed to minimize thermal cracking.

    Saw and Seal is the process of introducing uniformly spaced sawed joints to a bituminous overlay in an

    attempt to eliminate or retard the formation of thermal and/or reflective cracking. Several states, including

    Minnesota, New York and Massachusetts have successfully used the saw and seal process. MaineDOT is

    currently evaluating two saw and seal projects to determine the effectiveness of this process in

    minimizing thermal cracking.

    Performance Grade binder is a modified asphalt binder designed for use in harsh temperature conditions.

    Its application is intended to minimize thermal cracking. PG binder 58-34 is designed for a maximum

    pavement design temperature of 58 ºC and a minimum temperature of -34 ºC.

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