Compaction

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Rte. 36 in Macon County, Mo.

Workers use IC and IR to improve paving operations on Rte. 36 in Macon County, Mo.

Article May 23, 2018
The Missouri Department of Transportation (MoDOT) executed a year-long project throughout 2017 to demonstrate the use of intelligent compaction (IC), infrared scanning (IR) and Veta software to improve pavement construction operations.   “We were looking for ways to assess quality in asphalt...
EnviroTech Owl Canyon Road
Case Studies March 20, 2018
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...
I-4 Ultimate In Orlando logo
News August 21, 2017
On Aug. 18, 2017, the editorial staff of Roads & Bridges magazine visited the $2.3 billion I-4 Ultimate project in Orlando, Fla. The 21-mile project site is presently at the midpoint of its construction, and the scale was enormous. We brought our 360 camera along for the trip.
Caltrans experiments with intelligent compaction
Article June 07, 2016
The California Department of Transportation (Caltrans) is working towards going “all in” on intelligent compaction (IC).   IC is viewed as a means to improve contractor quality control on the compaction of asphalt pavements, thus leading to longer-lasting pavements. In addition, as the process...
Article July 15, 2010
Contractor's Choice Awards Gold Medal Winner - Compaction Caterpillar CS56 Fuzz Bates, vice president of Weaver Brothers Construction of Concord, N.H., is familiar with the challenges of New England’s unpredictable weather. “We’ve been building roads in New Hampshire for 65 years—we’ve seen it all...
Article May 11, 2009
There is a slight parallelism between the state of our country today and in 1956, when President Dwight D. Eisenhower signed landmark legislation intended to shore up the nation’s defense and strengthen business and trade. The Federal-Aid Highway Act of 1956, also referred to as the National...
Article August 16, 2004
Little by little, the experienced roller operator is becoming a rarity on today’s jobsites. This isn’t for lack of demand. In fact, because of more sophisticated asphalt mix designs, increasing quality expectations and ever-shrinking schedules, compaction requirements are more complex than ever....
Article August 18, 2003
For paving contractors, the word "density" is probably as familiar as that first cup of coffee in the morning. Two other key words that will guide him or her through the day are "bonus" and "penalty." Unlike any other contractor in the world of construction, the paving contractor probably faces...
Article August 18, 2003
Imagine sitting in front of your computer, playing a video game and calling it "work." Sound too good to be true? It might not be. A group of researchers at the University of Washington are working on a first-generation 3-D hot-mix asphalt (HMA) compaction trainer called the Xpactor. The Xpactor...
Article April 16, 2003
Within the last couple of years, a number of high frequency vibratory rollers have hit the road building market. The trend is growing so rapidly that frequency has become the one specification in which potential buyers seem most interested. Why? The reason for their increased interest is quite...
Article April 16, 2003
Buy a can of coffee at the store. Bring it home. Dump it out on the kitchen table. Then sweep it over the edge of the table so it falls back into the can and notice that it does not all fit until you rap on the can to make the coffee granules pack down. "What we have just done is introduce...
Article August 19, 2002
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Article December 28, 2000
A number of state highway departments have begun using the Superpave method to design their hot-mix asphalt (HMA) mixtures. In most cases, these mixtures have been able to be produced, placed, and compacted without significant problems. The mixtures are relatively stiff and stable under the...
Article December 28, 2000
The single most important factor that affects the long-term durability of a hot-mix asphalt (HMA) pavement is the density of the mix that is achieved by the contractor at the time of construction. The density of a material is defined as the weight of the material, which occupies a certain volume of...
Article December 28, 2000
Double-drum rollers Compaction America Inc., Kewanee, Ill., offers the Hypac C766C vibratory double-drum compactor, designed with a computer control system that includes a microprocessor display keeping the machine's performance in clear view of the operator. The microprocessor provides consistency...
Article December 28, 2000
There has been much discussion recently about mixture tenderness with some Superpave mixtures during field compaction. These mixtures appeared tender during placement even though they conformed to requirements, meeting Ninitial and not passing through the restricted zone. The tenderness is normally...
Article December 28, 2000
The Atlantic Ocean is more than a geographical barrier that separates North America from Europe. It is also the demarcation line of a different sort, separating the two cultures. While the contrast between the New World's and Old World's tastes in cuisine and haute couture are well documented,...
Article December 28, 2000
The Strategic Highway Research Program (SHRP) ended in March, 1993. The activity of this highway program included $50 million devoted to the study of asphalt cement binder tests and specifications, as well as tests and specifications on hot-mix asphalt (HMA) materials. The end result of the SHRP...
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