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The Transportation System Preservation Technical Services Program (TSP2) is sponsored by AASHTO. The program is contracted to the National Center for Pavement Preservation (NCPP) at Michigan State University. The NCPP is hosting HiMA thin lift paving field studies with Kraton and interested U.S. state DOTs. The study started in 2010, working with ten northeast U.S. states and Professor Walaa Mogawer, director of the Highway Sustainability Research Center at the University of Massachusetts Dartmouth; to develop a HiMA thin lift asphalt specification. To learn more see the related videos and job stories showcasing the progress of this study.
AASHTO TSP2 thin lift asphalt demonstration
Program Explanatory Documents and Test Results
The University of Massachusetts at Dartmouth is conducting a study of Kraton high-polymer content thin lift mixtures containing up to 40 percent RAP. The study plans initially to test materials from Massachusetts and New Hampshire, and subsequently, several other states.
HiMA AASHTO video (3 minutes)
Pacific Builder and Engineer, AUGUST 2012
Oregon Tries Advanced Pavement Overlay
The Oregon Department of Transportation (ODOT) recently had a section of Interstate 5 paved with advanced hot mix asphalt as part of a nationwide demonstration program involving thin pavement overlay incorporating highly polymer-modified asphalt binder (HiMA).
Knife River Materials manufactured and installed the new HiMA mix for ODOT’s demonstration on a two-mile segment of northbound lanes of I-5 near Medford, the seat of Jackson County located in southern Oregon near the California border.
Better Roads, February 2012
Fast Forward - AASHTO’s TSP • 2 Program Speeds Acceptance of Technologies, Materials
Atechnology transfer program administered by the American Association of State Highway & Transportation Officials (AASHTO) is helping state departments of transportation expedite review of potentially promising new pavement and bridge technologies prior to acceptance or rejection as specifications. On the good side, a rigorous acceptance process means that the chance of spending scarce tax dollars on a questionable technique or material is greatly reduced. On the bad side, each DOT employs a rigorous acceptance process for each technology or product, and this can stifle use of innovative materials.
asphalt, january 2012
NHDOT Widens Search for Longer-lasting Pavements
The performance of thin-lift hot asphalt overlay recently placed on U.S. Route 202 in Rochester, NH 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, NH, 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.
New England Construction, december 2011
After Floods, Vermont Fixes, Maintains Roads
Approximately one month after Hurricane Irene had dumped up to 12
inches of rain in parts of Vermont on August 28, 2011, causing the
state’s worst flooding in 80 years, state and municipal construction crews assisted by the Vermont National Guard had rebuilt and reopened many of the sections of some 300 roads that had been closed due to storm damage.
Western Builder, november 2011
MnDOT Trial Seeks To Reduce Pavement Cracks
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
New England Construction, november 2011
NHDOT Widens Search For Lon ger-Lasting Pavements
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 oneinch 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.
Better Roads, March 2011
Road Science Tutorial
As road agencies strapped for cash look for ways to optimize their
limited dollars, many are taking a much closer look at the practice of
pavement preservation. And standing there to help is a host of regional partnerships across the United States and Canada that bring
together representatives of state and local agencies, contractors,
suppliers, academic institutions, consultants and the Federal Highway Administration (FHWA) to promote pavement preservation while advancing research. Pavement preservation techniques are being promoted by the FHWA and the American Association of State Highway & Transportation Officials (AASHTO) as cost-effective and environmentally-sustainable strategies designed to extend the life of existing pavements before they deteriorate substantially. These techniques include nonstructural preventive maintenance surface treatments such as crack sealing, chip sealing, micro surfacing and thin-lift hot-mix asphalt paving.