Reclaiming / 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 Owl Canyon Corridor in northern Larimer County, Colo., is an 11-mile section of Larimer County Road 70 and 72 that serves as an important connection between U.S. Highway 287 and I-25. The westernmost three miles of the corridor is non-paved, consisting of a treated gravel surface.
As the...
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 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...
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...
Due to environmental and economic benefits, reclaimed asphalt pavement (RAP) has now been routinely used in pavement construction.
There has been a request from the asphalt paving industry to increase RAP limits allowed in asphalt pavement mixtures to achieve an even greater economic benefit....
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...
Roads & Bridges is now accepting nominations for the 2018 ARRA Recycling Awards.
These awards honor the top asphalt road recycling projects in North America. Nominations are submitted to the R&B editorial staff, which selects the winners based on amount of RAP used, cost savings and...
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....
P.J. Keating finished paving the project in Worcester in October 2016.
In today’s culture, to be green is to be great. Under the umbrella of its GreenDOT program, the Massachusetts Department of Transportation (MassDOT) has given its six districts leeway to employ innovative techniques to use more sustainable practices for greener asphalt pavement maintenance and...
In 1942, as the nation plunged headlong into the second world war, the U.S. military opened the Dugway Proving Ground, an installation located 85 miles southwest of Salt Lake City, Utah, for the purpose of testing biological and chemical weapons in a low-drift, relatively contained area.
This...
Mount Whitney, best known as the highest peak in the contiguous U.S., graces the Sierra Nevada mountain range in California with its towering presence at Sequoia National Park and Inyo National Forest at an elevation of 14,505 ft.
Serving as the gateway to this colossal summit is Whitney Portal,...
To settle the nerves he just kept making a fist.
After water was added to a mixture that included portland cement, the old asphalt that once formed Main Street (and its sub-base) in the village of Verdigre, Neb.,
Dale Bohac started following the padfoot roller on the job. Every few yards he would...
The state of Minnesota has a rather diverse ecological and geographical environment, with a majority of agriculture and farmland to be found in the southwest region of the state, while wild, forested lands still heavily occupy the northwest.
As such, the Minnesota Department of Transportation (...
Pavement recycling is a term that encompasses several cost-effective and environmentally conscientious asphalt pavement rehabilitation processes.
These processes include cold in-place recycling (CIR), cold central plant recycling (CCPR) and full depth reclamation (FDR). Working within the upper 2...
The first full-depth reclamation (FDR) pilot project on a California Department of Transportation (Caltrans) highway was undertaken in 2001 on S.R. 20 in Colusa County. A number of other pilot projects followed on state, county and city highways.
Early performance on these pilot projects was...
The concept of mechanically stabilized earth (MSE) technology dates back to the earliest of human history when people used sticks and branches to reinforce mud dwellings.
The oldest known MSE-like structure in the U.S. dates back to the 1880s and can be found along the Mississippi River. Modern...
Like many cities and rural communities, the city of Bel Aire, Kan., located just north of Wichita, is experiencing increased traffic growth both in volume and load. 45th Street is one of the main east-west roads through the city and connects two minor arterial roadways. The asphalt street was so...
The use of reclaimed asphalt shingles (RAS) in asphalt mixes is on the rise.
A recent survey conducted by the National Asphalt Pavement Association (NAPA) showed that RAS use reached 1.9 million tons nationwide in 2014, an increase of nearly 180% since 2009. While reducing material costs for...
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...
