Pavement Preservation Journal - Summer 2016 - (Page 23)
By Dr. Buzz Powell, P.E.
lanning and procurement are
underway for the placement
of northern pavement
preservation sections in
central Minnesota in July 2016.
MnROAD worked with state DOTs
with a northern research focus to
develop a consensus to utilize 2.1 miles
of Mille Lacs County Road 8 as the
low-traffic road, and U.S. 169 as the
higher-traffic road, near Pease, Minn.
Both sections are located about
45 minutes north of the main
MnROAD test site on I-94 near
Albertville just north of Minneapolis.
Martin Marietta Aggregate's Waite
Park granite will be the aggregate
source and Flint Hills Resources will
provide the asphalt emulsions.
Age and pretreatment condition
of the existing pavement surfaces
on County Road 8 and U.S. 169 were
the primary factors in the selection
process for both locations. The
from Lee Road 159 will be placed
in both locations in order to
encompass the effects of thermal
cracking and snow plow damage.
The objective to replicate the
original southern research on
Lee Road 159 in a northern climate
was achieved, noting the same types
of minor changes made in treatments
and combinations prior to placement
on U.S. 280 (i.e., refining the number
and type of Thinlay sections).
Vance Brothers will be the placement
contractor for the northern treatments
just like they were for the southern
treatments, which will eliminate
the otherwise confounding effect of
placement quality on performance.
Also, the Fall 2016 sponsor meeting
will be held at MnROAD so funding
partners can observe post treatment
condition of all the low and high
volume road treatments/combinations.
The sixth research cycle at the
NCAT Pavement Test Track and the
third phase of MnROAD research
are for the first time 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 this preservation group (PG15)
experiment, in which FP2 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.
More information on the partnership
and nationwide experiment it supports
TESTS IN SOUTHERN CLIMATE
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 summer 2012 on Lee
Road 159 (a dead end access road
to a quarry and asphalt plant).
Treatments were placed in 100-foot
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.
At deadline in the middle
of April 2016, approximately
five million equivalent single axle
loadings (ESALs) had been applied
in an accelerated manner to select
preservation treatments placed on
the NCAT Track in spring 2014.
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
all have demonstrated short-term life
extending and condition improving
benefits. Long-term data collection will
quantify the full benefit of pavement
preservation in a southern climate.
State highway agencies interested
in participating in this pavement
preservation and recycling research
should contact either Ben Worel
Minnesota DOT, or Buzz Powell
(firstname.lastname@example.org) at NCAT for
Powell is assistant director and Test Track
manager, National Center for Asphalt
Technology, Auburn, Ala.
pavement preservation journal
HOW FP2 WORKS FOR YOU
July Placement for MnRoAD
Preservation Test Sections
Table of Contents for the Digital Edition of Pavement Preservation Journal - Summer 2016
NPPC 2016 Speakers Bring Value
July Placement for MnROAD Preservation Test Sections
‘Curve’ Appeal: High Friction Surface Treatments Key to Safer Pavements
FP² @ WOA
How to Reach Out to Your Senator, Rep
ARRA-AEMA-ISSA Convene in Florida
Metro Planning Organizations Key to Preservation Funding
Visalia, Calif., Maintenance Project Wins Project of the Year Award
Program Draws Students to Preservation
Index of Advertisers
Pavement Preservation Journal - Summer 2016