Asphalt

Welcome to the Asphalt Channel, a special feature that provides the user an in-depth look at the hot-mix asphalt industry.  This section offers several areas to explore: product spotlights, article archives, related case studies, related video and product/supplier contact list.   

Article February 09, 2017
After federal regulations resulting from the Intermodal Surface Transportation Efficiency Act of 1991 (ISTEA) lifted a long-standing ban on using pavement warranties, many states across the U.S. experimented with various types of warranties.   Prior to ISTEA, the Federal Highway Administration (...

Paving crews worked the inside lanes at night utilizing the notched wedge joint on the shoulder lane.

Article February 09, 2017
State DOTs have a primary responsibility to maximize the return on investment from the considerable public funds spent to build and maintain their highways and interstates.   To manage the long-term costs of its aging inventory of concrete pavements, the Washington State Department of...
Article February 09, 2017
Christopher Columbus was a man with a vision. Meriwether Lewis and William Clark were men with a vision. Brian Devick, mayor of Woodward, Iowa, too is a man of vision.   The citizens of this small, central Iowa town will benefit from his vision for decades to come. In the summer of 2015, the vision...
Article February 09, 2017
Pavement quality control is an important endeavor for transportation agencies.   It involves ongoing research for new methodologies in pavement surfacing. One of the main issues affecting the performance of asphalt pavement is segregation. Segregation is defined as “a lack of homogeneity in the hot...
Article February 09, 2017
Asphalt pavements are inherently sustainable. A fully reusable material, more than 99% of asphalt pavement removed during maintenance and repair activities can be reclaimed for use in new pavements. During the 2015 construction season, a total of 78 million tons of asphalt pavement was reclaimed...
News February 09, 2017
The Los Angeles County Metropolitan Transportation Authority (Metro) recently awarded a $7.6 million contract to Michael Baker International to study the I-605/SR-91 interchange, identify improvements and widen a particularly choked three-mile stretch of westbound SR-91 in Los Angeles. The contract...
Article February 08, 2017
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...
Article February 08, 2017
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,...
Article February 08, 2017
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...
Article February 08, 2017
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 (...
Article February 08, 2017
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...
Article February 08, 2017
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...
Article February 08, 2017
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...

Image source: OCTA

News February 08, 2017
Last week the Orange County Transportation Authority (OCTA) executed the design/build contract for the I-405 Improvement Project with OC405 Partners, a joint venture consisting of OHL USA and Astaldi Construction Corporation.   With a contract price of over $1.2 billion and a total estimated...
News February 07, 2017
The nation’s governors will submit a list of more than 300 infrastructure projects to President Trump’s administration this week, aiming to share billions he is urging for nationwide construction projects.   The requests by governors from at least 44 states are in addition to a preliminary list of...

Image source: Pam Panchak/Pittsburgh Post-Gazette
 

 
News January 30, 2017
After decades of talk and planning and design, major construction will begin this week on the 4-mile section of the Southern Beltway between Quicksilver Road and Route 22 near Pittsburgh International Airport.   Crews from Independence Excavating of Cleveland and its subcontractors have been...

Photo source: CDOT

News January 20, 2017
The Federal Highway Administration (FHWA) has approved the reconstruction of I-70 through central Denver.   Federal Highway Administration approval concludes the federally required National Environmental Protection Act process and allows the Colorado Department of Transportation (CDOT) to proceed...

The retaining wall creates a safe place for truck drivers to chain-up their tiers during snowy weather

Case Studies January 20, 2017
The Challenge: When it snows in Vail, Colorado, it’s a skier’s dream—but for drivers, especially of trucks maneuvering steep mountain roads, it can be treacherous. To make things safer, the Colorado Department of Transportation (CDOT) wanted to widen I-70 at both sides of mountain pass locations...

Photo courtesy: fotoluminate 123RF

News January 18, 2017
It seems California is coming up short in its revenue projections to cover Gov. Jerry Brown’s proposed $179.5 billion budget for 2017. But according to sources, the governor is entertaining two means of raising funds to pay for a $4.3 billion dollar infrastructure plan,   “A $65 annual [vehicle]...
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