Pavement Preservation Journal - Winter 2014 - (Page 15)

HOW FP2 WORKS FOR YOU R26 Workshop: Breakout for High Volume Highway Preservation By Tom Kuennen is composed of a 3.5-mile mainline interstate highway (I-94) that carries 29,000 vehicles per day with 13 percent trucks; a 3.5-mile bypass interstate for live traffic diverted off the main line when it is undergoing construction and analysis; and a 2.5-mile closed-loop, low volume roadway served by an 80,000 lb., five-axle tractor-trailer for live loadings. There, the delegates saw the durability of certain preservation treatments placed on the portion of the MnROAD facility which carries actual interstate traffic, which had been diverted to the bypass for work on the test sections and for the visit. Minnesota DOT is one of 14 road agencies that received funding for the initial testing implementation of R26 methods. "MnROAD is a long-term pavement testing facility that gives researchers a unique, real-life laboratory to study and evaluate the performance of materials used in roadway construction," said Jerry Geib, P.E., metro pavement and materials engineer, Minnesota DOT, at the workshop. Preservation treatments seen by delegates at MnROAD included flexible micro surfacing, ultra thin bonded wearing course, thin warm mix asphalt overlays, chip seals, and the Next Generation Concrete Surface of specialized concrete pavement diamond grinding. HIGH VOLUME PRESERVATION For a number of reasons, preservation of high traffic pavements is not as widespread as for local roads, said Jim Moulthrop, P.E., executive director of FP2 Inc. "The practice of pavement preservation on high-traffic volume roadways is not as common as on lower-traffic volume roadways," Moulthrop said, adding the specific treatments used on low volume roads may not be as effective on high volume pavements. "The benefits of high volume roadway pavement preservation are not as readily recognized as IMAge CReDIT: TOM KueNNeN T he next era of pavement preservation - that of high volume pavements, like dual lane highways and interstates - is underscored by two recent publications from the second Strategic Highway Research Program (SHRP2). The two publications-Guidelines for the Preservation of High-TrafficVolume Roadways and its companion report, Preservation Approaches for High-Traffic-Volume Roadways provide a snapshot of where high volume pavement preservation is now, and highlight a path to the future. These publications represent the first methodical and wide-ranging elaboration of the process of pavement preservation for high traffic roads, and provide technical details and a structure for implementation of preservation for high volume highways. These important documents were the underpinnings for an exciting workshop in Minneapolis in early September, the SHRP2 R26 Workshop for the Preservation of High Traffic Volume Roadways, held in conjunction with the annual meeting of the Midwest Pavement Preservation Partnership. Some 165 delegates from 30 states and Canada attended the three-day workshop and learned of ongoing research in preserving high-traffic volume roadways, and the reliability of existing applications in states from coast-to-coast. The highlight of the workshop was a field trip to the sprawling MnROAD pavement test track some 40 miles northwest of Minneapolis. MnROAD Opening session of R26 Workshop on Pavement Preservation for High Volume Roadways hears David Peshkin, Applied Pavement Technology Inc., on the content of the two publications; to his right are Jerry Geib, P.E., Minnesota DOT; Jim Moulthrop, P.E., FP2 Inc.; and Thomas Van, FHWA Winter 2014 pavement preservation journal 15

Table of Contents for the Digital Edition of Pavement Preservation Journal - Winter 2014

President's Message
NCAT, MnROAD Partnership - New Era in Preservation Study
R26 Workshop: Breakout for High Volume Highway Preservation
Penetrating Emulsion, Double Chip Seal Saves Unpaved Road
Open Graded Warm Mix Boosts County Dirt Roads
You’ll Benefit from PPRS Paris 2015
CIR, Thin Seal Work Wins Norjohn Ontario Green Award
Digging PCC ‘Buried Treasure’ Beneath Asphalt Overlays
Polymer-Based Materials for Unpaved Road Maintenance
Index of Advertisers

Pavement Preservation Journal - Winter 2014