Asphalt Recycling
Image: NCAT
Cargill is partnering with the National Center for Asphalt Technology (NCAT) in Opelika, Ala., and the Minnesota Department of Transportation’s (MnDOT) MnROAD program in Albertville, Minn., to determine how to best implement performance-engineered mix design procedures, especially in mixes...
The Mason Business Center lots had to remain available to employees throughout construction.
So . . . how challenging can it really be to pave some parking lots?
Ubiquity and commonplace function serve to make such aspects of our infrastructure all but invisible—even as they are treated to the same pummeling use as all other forms of paved surfaces. A recent project in Mason, Ohio, that...
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The Four Bridges at Lake Fork drummed up enough business to support the Rainbow Hotel not far off of U.S. 50 in Gunnison County, Colo., in the early 20th century.
In fact, there were a few hotels in the area, as people of all types and from all different places came to admire the “new” U.S. 50...
The Elm Street rehabilitation project was conceived and funded as a complete streets project, in order to accommodate a variety of transportation modes.
If one were to do a Yelp search for the best restaurants in downtown Manchester, N.H., a number of the top-rated spots would be found on Elm Street, a key thoroughfare that stretches from the south end to the north through the heart of the Queen City.
This particular corridor is in a crucial...
Arches National Park is located in the western U.S, just a few miles north of one of the eco-tourism capitals of the world, Moab, Utah.
This region of eastern Utah is a popular outdoor recreation area known for its hiking, backpacking, world-class mountain biking and adventures for 4-x-4 off-road...
Image source: Equipment World's Better Roads
A Pennsylvania Department of Transportation (PennDOT) pilot paving program is testing a 3-in. lift of recycled asphalt paving (RAP) on two sections of roadway in Armstrong County.
The program is being conducted through PennDOT’s Road Maintenance and Preservation (Road MaP) initiative, which Gov....
The objective of this study was to evaluate how increasing the volume of virgin binder, using a softer grade of virgin binder or using a WMA chemical additive affected the durability and performance of RAP mixtures.
Using reclaimed asphalt pavement (RAP) in asphalt mixtures can provide significant economic savings to contractors and highway agencies by reducing the demand for both the virgin binder and aggregates in asphalt mixtures.
Unfortunately, some highway agencies are reluctant to increase RAP content...
.jpg?itok=Y0MLaN9m "Total lift thickness for the roundabout was 6.5 in. The 19-mm mix was used for the first lift (2.5 in. thick) and second (2.25 in. thick), but Northeast Asphalt had to use a Wisconsin DOT higher ESAL mix for the 1.75-in. surface course.")
Total lift thickness for the roundabout was 6.5 in. The 19-mm mix was used for the first lift (2.5 in. thick) and second (2.25 in. thick), but Northeast Asphalt had to use a Wisconsin DOT higher ESAL mix for the 1.75-in. surface course.
Last year’s modern day Ice Age buried routes across the U.S. with its frozen malice.
Many public works officials had to pick through the remains of pavement during the spring and summer months of 2014.
Up in Wisconsin, the glacier-like effect left an 8.1-mile portion of State Trunk Highway (...
.jpg?itok=YI5pMCfk "Two case study OGFCs were constructed as part of the 2012 NCAT Pavement Test Track, which used GTR-modified binders and no fibers. No cracking or raveling are evident in either test section to date.")
Two case study OGFCs were constructed as part of the 2012 NCAT Pavement Test Track, which used GTR-modified binders and no fibers. No cracking or raveling are evident in either test section to date.
Asphalt mixtures are commonly comprised of various ratios of aggregate, asphalt binder and air. While this is usually the case for standard dense-graded Superpave mix designs, specialty mixtures such as open-graded friction courses (OGFCs) and stone-matrix asphalt (SMA) mixes typically contain some...
A full-depth reclamation (FDR) project involving the removal of a failed portland cement concrete pavement and the construction of an 8-in. stabilized reclaimed asphalt pavement (RAP) and aggregate base with an engineered asphalt emulsion, is hardly an event of Biblical proportions. But the long-...
Pavements continue to be among the most recycled materials on the planet. Over the past several decades, the asphalt industry has successfully innovated the use of reclaimed asphalt pavement, or RAP. This has inarguably led to significant environmental and economic benefits. To move the needle...
By the beginning of 2014, Mooney Road through California’s Sierra Nevada Mountains bore a strong resemblance to its lunar namesake. “The road gets lots of heavy truck traffic for logging, plus lots of snow and ice build-up in the winter, so the whole thing was wheel-rutted out,” Weston Hutchings,...
Reclaimed asphalt pavement (RAP) has rapidly become a dependable means of resurrecting roadways in the state of California. As Greg Kelley, assistant deputy director for the Geotechnical and Materials Engineering Division of Los Angeles County, told Roads & Bridges, “Every agency should...
Several of the trees entrenched in the landscape covered by District 2 of the Pennsylvania Department of Transportation (PennDOT) are marked to become a piece of expensive furniture.You can’t find better cherry, maple or oak wood anywhere else in the U.S. Unfortunately the roads which service the...
News
October 20, 2014
According to a report issued by the Virginia Department of Transportation (VDOT), the results of a 2011 project to rehabilitate a southbound section of I-81, near Staunton, Va., showed a conclusively positive outcome of the unique use of multiple forms of recycled materials to repair and recreate...
News
October 28, 2013
Now is the time to nominate your asphalt road recycling project. All projects that have been in the design, construction or completion phase over the past 18 months qualify. To fill out a nomination form, go to www.roadsbridges?.com/recycling-nomination. Deadline for nominations is Dec. 3.
Article
March 20, 2012
The use of reclaimed asphalt pavement (RAP) has received significant attention nationally in the last few years.
With the increase in raw material prices and for environmental reasons, there is a demand to use more recycled materials. The use of more RAP in asphalt pavements is a potential cost...
Article
April 07, 2011
Road construction is a more than $80 billion annual industry in the U.S. Over the last decade, the industry has been driving toward greener and more sustainable design, construction, use and maintenance.
New technologies, new materials and new practices all play an important role in reducing the...
Article
March 10, 2011
In Oregon, Century Drive Highway is a big deal. How big? It is important enough to merit a Wikipedia entry.
The route winds its way through a dark-green pine forest and leads to the Cascade High Lakes recreational area. In the warmer months, traffic can get quite heavy, including a fair number of...
Article
February 10, 2011
Using recycled material is obviously good for the environment and saves money. But in the case of Illinois Highway 1, in Christian County, it also helped create a cleaner and safer road. For its extensive use of recycled material, the project won one of the 2010 ROADS & BRIDGES/ARRA recycling...
