Pavement Preservation Journal - Fall 2016 - 17

By Dr. Buzz Powell, P.E. F ull-scale accelerated pavement testing has been conducted at the National Center for Asphalt Technology (NCAT) Pavement Test Track at Auburn, Ala., since 2000. Practical research in surface mix performance, structural pavement design, and pavement preservation has been cooperatively funded in three-year research cycles by state departments of transportation (DOTs) located primarily in the southeastern United States. In the meantime, the Minnesota DOT's Road Research Facility (MnROAD) has been conducting research in these same focus areas for northern states since 1994. The sixth research cycle at the NCAT Pavement Test Track and the third phase of MnROAD research are for the first time officially engaged in a research partnership that is cooperatively funded by numerous state DOTs from all over the country for the purpose of executing a national long-term pavement preservation benefit experiment. The objective of the preservation group (PG15) experiment, in which FP2 Inc. is an equal funding partner, is to quantify the benefits of pavement preservation on both low volume and high volume roadways with results that are implementable in both northern and southern U.S. climates. Performance of a comprehensive selection of treatments and combinations will for the first time be related to varying levels of pretreatment pavement condition in both hot and cold climates. This will equip agencies from all over the country to select future treatments that will provide the best life cycle investment for each individual roadway. QuAntiFying southern treAtments: ncAt The first preservation treatments were placed in select (100 ft., single-lane) sections on the NCAT Pavement Test Track in the spring 2014 after trigger levels of cracking (20 percent of the total lane area) were reached. A limited number of treatments and combinations were carefully selected for accelerated traffic testing on the track, in order to ideally complement a larger number of low-traffic treatments and combinations that were placed off the track in the summer 2012 on Lee Road 159 (a dead end access road to a quarry and asphalt plant). Treatments were placed in 100 ft. sections in both the inbound (lightly loaded) and outbound (heavily loaded) lanes. FP2's participation in the design and execution of the 2012 experiment was key to the success of the overall effort. Some of the preservation treatments that were placed on the NCAT Pavement Test Track in the spring of 2014 had to be replaced in April 2016 after approximately 4.9 million equivalent single axle loadings (ESALs) had been applied in an accelerated manner. Micro surfacings, ThinLay, and HMA cape seals remain in service and may survive until the end of the 2015 research cycle. Approximately 600,000 ESALs had been applied in the more heavily loaded outbound lane of the comprehensive array of preservation treatments applied on Lee Road 159 in the summer 2012. Likewise, over 600,000 ESALs had been applied to the high traffic treatments placed on U.S. 280 in summer 2015. The performance (quantified with weekly performance measurements for roughness, rutting, macrotexture, and cracking) of all treatments and combinations has generally been very good on all three southern locations (the track, Lee Road 159, and U.S. 280). Crack sealing, scrub sealing, micro surface, cape sealing, and thin overlays have continued to demonstrate short-term life extending and condition improving benefits. Long-term data collection will Northern-climate high-traffic treatments will be placed on U.S. 169 near Pease, Minn. Fall 2016 pavement preservation journal 17 HOW FP2 WORKS FOR YOU NCAT: Quantifying Southern Treatments, Placing Northern Treatments

Table of Contents for the Digital Edition of Pavement Preservation Journal - Fall 2016

President’s Message
Still Time to Visit NPPC 2016
NCAT: Quantifying Southern Treatments, Placing Northern Treatments
LTPP Tackles Pavement Preservation
D.C. Update: Capitol Hill Etiquette for Visits
FP2 @ Eurasphalt & Eurobitume 2016
Los Angeles County Abandons 'Worst First' Pavement Program
High-Volume U.S. 3 Gets R26 Showcase Preservation
New Mechanistic Tool Assesses Joint Sealant Effectiveness
Index of Advertisers
Pavement Preservation Journal - Fall 2016 - Cover1
Pavement Preservation Journal - Fall 2016 - IBD_L
Pavement Preservation Journal - Fall 2016 - IBD
Pavement Preservation Journal - Fall 2016 - cover2
Pavement Preservation Journal - Fall 2016 - 3
Pavement Preservation Journal - Fall 2016 - 4
Pavement Preservation Journal - Fall 2016 - 5
Pavement Preservation Journal - Fall 2016 - 6
Pavement Preservation Journal - Fall 2016 - 7
Pavement Preservation Journal - Fall 2016 - 8
Pavement Preservation Journal - Fall 2016 - President’s Message
Pavement Preservation Journal - Fall 2016 - 10
Pavement Preservation Journal - Fall 2016 - Still Time to Visit NPPC 2016
Pavement Preservation Journal - Fall 2016 - 12
Pavement Preservation Journal - Fall 2016 - 13
Pavement Preservation Journal - Fall 2016 - 14
Pavement Preservation Journal - Fall 2016 - 15
Pavement Preservation Journal - Fall 2016 - 16
Pavement Preservation Journal - Fall 2016 - NCAT: Quantifying Southern Treatments, Placing Northern Treatments
Pavement Preservation Journal - Fall 2016 - 18
Pavement Preservation Journal - Fall 2016 - 19
Pavement Preservation Journal - Fall 2016 - LTPP Tackles Pavement Preservation
Pavement Preservation Journal - Fall 2016 - 21
Pavement Preservation Journal - Fall 2016 - 22
Pavement Preservation Journal - Fall 2016 - 23
Pavement Preservation Journal - Fall 2016 - 24
Pavement Preservation Journal - Fall 2016 - D.C. Update: Capitol Hill Etiquette for Visits
Pavement Preservation Journal - Fall 2016 - 26
Pavement Preservation Journal - Fall 2016 - FP2 @ Eurasphalt & Eurobitume 2016
Pavement Preservation Journal - Fall 2016 - 28
Pavement Preservation Journal - Fall 2016 - Los Angeles County Abandons 'Worst First' Pavement Program
Pavement Preservation Journal - Fall 2016 - 30
Pavement Preservation Journal - Fall 2016 - 31
Pavement Preservation Journal - Fall 2016 - 32
Pavement Preservation Journal - Fall 2016 - 33
Pavement Preservation Journal - Fall 2016 - High-Volume U.S. 3 Gets R26 Showcase Preservation
Pavement Preservation Journal - Fall 2016 - 35
Pavement Preservation Journal - Fall 2016 - 36
Pavement Preservation Journal - Fall 2016 - 37
Pavement Preservation Journal - Fall 2016 - 38
Pavement Preservation Journal - Fall 2016 - New Mechanistic Tool Assesses Joint Sealant Effectiveness
Pavement Preservation Journal - Fall 2016 - 40
Pavement Preservation Journal - Fall 2016 - 41
Pavement Preservation Journal - Fall 2016 - Index of Advertisers
Pavement Preservation Journal - Fall 2016 - cover3
Pavement Preservation Journal - Fall 2016 - cover4
Pavement Preservation Journal - Fall 2016 - outsert1
Pavement Preservation Journal - Fall 2016 - outsert2
Pavement Preservation Journal - Fall 2016 - outsert3
Pavement Preservation Journal - Fall 2016 - outsert4
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