Asphalt Pavement Magazine - March/April 2015 - (Page 51)
Ride in Georgia
GDOT's formula for high quality
By Allen Zeyher
PAVEMENT PRESERVATION SMOOTHNESS LIFE-CYCLE ASPHALT OVERLAY MILLING PAVEMENT PRESERVATION SMOOTHNESS LIFE-CYCLE ASPHALT OVERLAY MILLING PAVEMEN
PRESERVATION SMOOTHNESS LIFE-CYCLE ASPHALT OVERLAY MILLING PAVEMENT PRESERVATION SMOOTHNESS LIFE-CYCLE ASPHALT OVERLAY MILLING PAVEMENT PRESERVATIO
SMOOTHNESS LIFE-CYCLE ASPHALT OVERLAY MILLING PAVEMENT PRESERVATION SMOOTHNESS LIFE-CYCLE ASPHALT OVERLAY MILLING PAVEMENT PRESERVATION SMOOTHNESS
he Port of Savannah in Georgia is being
deepened to accommodate bigger cargo ships.
The Savannah Harbor Expansion Project
recently began dredging in the Savannah
River to deepen the channel by 5 feet to allow
for post-Panamax II cargo vessels.
The U.S. Army Corps of Engineers estimates that the
harbor-deepening project will bring $174 million in
annual net benefits to the United States. It means an
additional 3,600 cargo containers in each transit, an
increase of 78 percent.
The extra cargo containers will mean extra truck
traffic to and from the port.
If the truckers are smart, they will head for State Route
27, also known as the Golden Isles Parkway, which now
has a beautiful, smooth new asphalt overlay on it. About
8.5 miles of the Golden Isles Parkway, in Appling County
between the Jeff Davis County line and Moody Altman
Road, northwest of the town of Baxley, was overlaid with
asphalt in 2013.
The final ride smoothness scored 0.393 meters per
kilometer as measured with a laser road profiler. The
roadway was milled, inlaid, and resurfaced due to
existing roadway conditions, such as aged, oxidized, and
cracked pavement. The smoothness before overlaying
was 0.940 meters per kilometer. This represented a 58.19
percent improvement in surface smoothness.
Starting with an IRI of 0.940 meters per kilometer, the
Georgia Department of Transportation (GDOT) and the
contractor had to dig deep into their quality control
programs to provide such a smooth pavement. For
starters, the asphalt plant producing the hot-mix asphalt
was located in Surrency, Ga., only about 10 miles from
the work site.
Everett Dykes Grassing Co. Inc., of Cochran, Ga.,
performed the leveling and paving for the project. The
contractor used a simple strategy of leveling course and
surface course to overlay the Golden Isles Parkway.
Most of the overlaid stretch of SR 27 was four-lane,
divided highway through a rural area, with an average
daily traffic of 6,200 to 6,500 vehicles with 10 percent
truck traffic including logging, farm equipment and
cargo trucks from the Port of Savannah.
The existing pavement suffered from load cracking and
moderate block cracking, and there was also some rutting
throughout the project area.
A short section of the highway had curbs and gutters.
In that section, the contractor milled an inch and
a half off the road before placing an overlay. In the
rural sections, without curb and gutter to match up to,
Georgia often leaves the structure of the pavement and
continued on page 53
Asphalt Pavement Magazine - March/April 2015 * 51
Table of Contents for the Digital Edition of Asphalt Pavement Magazine - March/April 2015
President’s Perspective Setting the Record Straight on Asphalt Recycling
Industry News TCC Study Finds Transportation Infrastructure Investment Benefits All Sectors of Economy, Silent Auction to Benefit NAPA Care, NAPA Launches Diamond Terminal Commendation, 2015 AASHTO & APTA Bottom Line Report, 2015 Quality in Construction Awards Program Opens for Nominations April 1
Successful Pavement Preservation with Thin Asphalt Concrete Overlays Excerpts from NCHRP Synthesis 464: Thin Asphalt Concrete Overlays
Improving Life-cycle Performance with Pavement Interlayers The right pavement interlayer can mitigate distress and promote long-term pavement performance
NCAT Pavement Preservation Experiment Set to Expand in 2015 Lee Road 159 offers valuable pavement preservation lessons to build on
A Smooth, Rehabilitated Ride in Georgia GDOT’s formula for high quality pavement preservation
Index of Advertisers/Advertisers.com
Asphalt Pavement Magazine - March/April 2015