Comparison of "saw and seal" procedure and performance grade binder to minimize thermal cracking : interim report - fourth year/final report.
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Published Date:2008-12-01
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Language:English
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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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