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Asphalt Article December 28, 2000
The Sheldon G. Hayes Award is given each year by the National Asphalt Pavement Association (NAPA) to the HMA pavement judged the highest quality in the nation. To select the 1998 Hayes award winner, 13 of NAPA’s Quality in Construction Award winners from 1997 were rated again this past summer after...
Asphalt Article December 28, 2000
The following is an overview of the contractors and projects chosen to receive recognition by the National Asphalt Pavement Association (NAPA) as finalists in the 1997 Sheldon G. Hayes Award competition for the highest quality asphalt paving project in the U.S. In May, ROADS & BRIDGES will...
Asphalt Article December 28, 2000
A few years ago, we complained about the premature cracking or rutting of our asphalt roadways. Those endless miles of bleached asphaltic-concrete interstates, with the furrows called ruts that never seemed to match the width of your wheel base. The longitudinal channels that swayed your car left...
Asphalt 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...
Asphalt 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...
Asphalt Article December 28, 2000
Segregation of hot-mix asphalt (HMA) is a problem facing road builders. When the aggregate becomes segregated prior to laydown, weak spots can form in the road. This will eventually lead to a quicker deterioration of the road. Segregation can first occur at the plant, when the mix material is...
Asphalt 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...
Asphalt Article December 28, 2000
Foamed asphalt technology is an in-place asphalt stabilization method that has been researched for several decades. A new development in this evolution, called expanded asphalt, is proving to be a technical success in the U.S., Europe and Africa. Expanded asphalt technology is being developed and...
Asphalt Article December 28, 2000
Superpave is an improved system for specifying hot-mix asphalt (HMA) component materials, HMA mix design and analysis, and pavement performance prediction. Implementation of Superpave, when fully developed, should minimize or eliminate rutting, fatigue cracking, and low temperature cracking. As...
Asphalt Article December 28, 2000
The Ohio DOT (ODOT) began its move toward full implementation of Superpave with the completion of a 50,000-ton project on U.S. 33 outside Athens, Ohio. The Shelly Co., Thornville, Ohio, accepted the change order to convert the project to a complete Superpave project. The level 1 mix design and...
Asphalt Article December 28, 2000
The Superpave system. We hear it mentioned at meetings, we read about it in magazines and newsletters, and we discuss it in the office. Yet what's the bottom line? Where are we right now in the transition to this performance-based asphalt mix design system? This month's column will provide a brief...
Asphalt Article December 28, 2000
The city of Des Moines has implemented new asphalt technology on two of its city streets over the past two years. The 1995 construction of east 29th Street was the first project in Iowa to utilize both Superpave binder and mix design. The 1996 construction of Douglas Avenue was an overlay project,...
Asphalt Article December 28, 2000
The StreetPrint Pavement Texturing system, developed by Integrated Paving Concepts Inc., is a process for imprinting and coloring asphalt to replicate the appearance and beauty of hand-laid pavers. In the last three years more than 200 asphalt paving contractors in North America have collectively...
Asphalt 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,...
Asphalt Article December 28, 2000
While the actual number of "Superpave miles" in Wisconsin's roadway system is low-approximately 4 to 5 miles-it has made an impression that greatly exceeds its physical presence. Tom Brokaw, asphalt, aggregate and soils engineer at the Wisconsin DOT, says the department has been very happy with...
Asphalt Article December 28, 2000
While virtually everyone in the industry is familiar with the term "Superpave," there still appears to be some confusion over just what Superpave is. To begin with, let's clarify what Superpave isn't: a tangible product. Superpave is an asphalt mix-design process. The resulting hot-mix asphalt is...
Asphalt Article December 28, 2000
Maryland, like most other states, has certain intersections that are prone to rutting. The reasons may differ from one intersection to another-one may have heavy truck traffic; another may be located at the base of a hill-but the result is always the same: Rutted roads that slow traffic and require...
Maccaferri MacGrid EG biaxial geogrids
Asphalt Paving Products
  Maccaferri MacGrid EG biaxial geogrids are produced with the same combination of performance properties, technology, material and manufacturing processes that have proven successful nationally and internationally for decades.  The introduction of the MacGrid EG biaxial geogrid series reinforces...
Overlay Init