Asphalt Pavement Magazine - March/April 2015 - (Page 51)

A Smooth, Rehabilitated Ride in Georgia GDOT's formula for high quality pavement preservation 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 T 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. Level Best 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 simply overlays. 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
Industry Events
Index of Advertisers/Advertisers.com

Asphalt Pavement Magazine - March/April 2015

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