MnDOT Trial Seeks To Reduce Pavement Cracks

ACP Western Builder, Volume 101, Number 11, November 2011

By Paul Fournier

Minnesota targets reflective cracking with test of polymer modified asphalt pavement on section of busy trunk highway

The Minnesota Department of Transportation (MnDOT) has taken aim at cracked pavements with a new highly modified asphalt mix.

MnDOT sanctioned the installation of hot mix asphalt modified with a high concentration of a new type of polymer on a section of Trunk Highway 100 west of Minneapolis, to see if the advanced product could reduce a certain type of pavement cracking.

“The 12.5 millimeter Superpave mix we’ve been using for our mill-and-fill operations has done a good job of reducing thermal cracking , but we need a way to reduce reflection cracks,” said Jerry Geib, MnDOT research operations engineer.

As a member of the Federal Highway Administration’s Pavement Preservation Expert Task Group and Midwestern Pavement Preservation Partnership (MPPP), Geib learned about a series of planned field demonstrations of thin-lift asphalt overlay incorporating highly polymer-modified liquid asphalt binder (HiMA). The demonstrations were to be held by the Northeast Pavement Preservation Partnership (NEPPP), which, like MPPP, is a regional partnership dedicated to advancing pavement preservation practices through education, research and outreach.

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