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Comparison of "saw and seal" procedure and performance grade binder to minimize thermal cracking : interim report - third year.
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2004-12-01
[PDF-871.06 KB]
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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 (MDOT) 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. MDOT 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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