Pavement Preservation Journal - Summer 2013 - (Page 21)

At NCAT Preservation Study, Performance Clues Emerge Fig. 1: Start of Lee Road 159 test section; oncoming shoulder shows backs of signs marking different preservation applications A t the ongoing NCAT pavement preservation study – even though preservation treatments were placed just late last year – clues are beginning to emerge that may lead to validation of pavement life extension via preservation treatments. In the fall of 2012, for the first time, preservation techniques began to be studied at the Pavement Test Track at the National Center for Asphalt Technology (NCAT) near Auburn, Ala. The new NCAT Pavement Preservation Effectiveness Study is bringing the prestige of NCAT’s research facility to pavement preservation practice. In addition to use of the NCAT Pavement Test Track to study pavement preservation treatments, preservation treatments were placed off-track on a half-mile local county road that supports traffic to an aggregate quarry and an asphalt mixing plant with a high percentage of truck traffic. There, as part of the NCAT Pavement Preservation Effectiveness Study, Lee Road 159 is serving as the host roadway for the off-track component of the 2012 multisponsor Preservation Group (PG) experiment (Fig. 1). “We’re starting to see clues on Lee Road 159 that may be indicative of the life-extending benefit curves we aim to define as a function of pretreatment condition, and low severity cracking is becoming more prevalent on track test sections designated for inclusion in the PG experiment,” said Buzz Powell, P.E., Ph.D., NCAT assistant director and Test Track manager. “And we are headed in the right direction with our plans for the future of the preservation Summer 2013 pavement preservation journal 21

Table of Contents for the Digital Edition of Pavement Preservation Journal - Summer 2013

President’s Message
‘Thinning Up’ Concrete Overlays for Pavement Preservation
IGGA: After Five Years, Colorado CPR Project Holds Strong
Joint Meeting Brings ARRA, ISSA, AEMA to California Desert
At NCAT Preservation Study, Performance Clues Emerge
Integrated System Keeps Fort Collins ‘Asset Smart’
New Alaska Database Aids Treatment Selection
GPR, FWD Analyze Airfi eld Pavements in South Carolina
TPPC: In Texas, Fog Seals Should Last 18 Months
Caution Due in Using MC-30 as Prime Coat
In Nevada, Cold Recycling Preserves I-80
Index of Advertisers

Pavement Preservation Journal - Summer 2013