NHDOT Widens Search For Longer-Lasting Pavements

ACP New England Construction, Volume 75, Number 11, November 2011

By Paul Fournier

Thin-lift asphalt demonstration by Continental Paving in Rochester is state’s latest effort to observe promising pavement preservation technologies

The performance of thin-lift hot asphalt overlay recently placed on U.S. Route 202 in Rochester, as one of a series of field demonstrations, is being closely monitored by the New Hampshire Department of Transportation (NHDOT) as it looks for promising products designed to extend pavement service life.

Continental Paving Inc. of Londonderry, N.H., supplied the hot mix asphalt and installed the one-inch asphalt overlay on a 2.4-mile section of highway under a demonstration provision included in the contractor’s $1.72-million contract for paving various roads in NHDOT’s Maintenance District 6. The thin-lift asphalt overlay incorporated highly polymer-modified liquid asphalt binder (HiMA) and was integral to a project initiated by the Northeast Pavement Preservation Partnership (NEPPP), a regional DOT group dedicated to advancing pavement preservation practices through education, research and outreach.

NEPPP’s demonstration project was hosted by the National Center for Pavement Preservation housed at Michigan State University, which is under contract to develop and administer the Transportation System Preservation Technical Services Program (TSP 2). This is a national program funded by the American Association of State Highway and Transportation Officials (AASHTO) that provides current information on pavement and bridge preservation measures.

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