|May 2015 Newsletter|
Minnesota Awarded the 2014 Perpetual Pavement Award
Seven states honored for success of long-life asphalt roads
The Asphalt Pavement Alliance (APA) has announced the seven winners of its 2014 Perpetual Pavement Awards.
The award is presented to state transportation departments and local agency road owners for well-performing asphalt pavements that are at least 35 years old with proven high-quality structural designs. To earn the award, the pavement must not have suffered a structural failure, and it should have an average interval between resurfacing of no less than 12 years. The road must demonstrate the characteristics expected from a long-life, Perpetual Pavement design: excellence in design, quality in construction, and value for taxpayers.
Engineers at the National Center for Asphalt Technology (NCAT) located in Auburn, Alabama evaluated the nominations and validated the results for the seven award winners. Since the Perpetual Pavement Award was first presented in 2001, 100 pavements in 30 U.S. states and one Canadian province have been honored with the award.
The 2014 winners are:
Winning agencies are honored by their local state asphalt pavement association and are presented with an engraved crystal obelisk. The names of the winning agency and the winning projects are also added to a plaque on permanent display at the NCAT Research Center at Auburn University.
The Asphalt Pavement Alliance is a partnership of the Asphalt Institute, National Asphalt Pavement Association and the State Asphalt Pavement Associations. For more information about the 2015 awards click here.
Mobile Apps in the Asphalt Industry
Technology has changed the way business is conducted over the last 10 years. It is hard to imagine the world without mobile telephones and tablets. These types of devices have revolutionized the way we communicate and provide tools to help us make better decisions, quicker and more efficiently.
Because of the technological advances we have experienced, the paving industry has embraced the movement with various types of apps that allow us to reduce paper and provide information quicker so that decisions can be made. Read more here
Technical Talk: Defining Albedo
It is common knowledge that darker colors tend to absorb light and lighter colors reflect light. When the light comes from the sun, heat and energy are absorbed by the darker colors.
While this is an easily understood phenomenon, the effects can be complicated.
Solar radiation reaches the Earth, providing the light and heat necessary for life; the unabsorbed solar energy reflected back to the atmosphere by light-colored surfaces is called albedo.
Surfaces that appear translucent or white, such as ice and snow, have the highest levels of albedo, thereby reflecting the greatest amount of solar energy. This fact explains why we can easily get sunburnt while skiing. Conversely, bare, wet soil has one of the lowest albedos, thus absorbing the solar energy.
How the Road Influences Vehicle Fuel Economy
Almost 75 percent of the oil consumed in the United States is used as vehicle fuel.1 Despite increases in vehicle fuel economy over the past few decades, fuel costs remain a significant budget item for the public and businesses alike. Numerous factors influence the fuel economy of a vehicle from its aerodynamic properties, engine, tire pressure, and air temperature; however, just three basic forces impact fuel economy: vehicle internal friction, air drag, and rolling resistance. Read more here.
FHWA Porous Asphalt Guidelines
A TechBrief has been released by the FHWA Office of Asset Management, Pavements, and Construction. This Technical Brief provides an overview of the benefits, limitations and applications of porous asphalt pavements with stone reservoirs. Considerations for design and construction, as well as maintenance, are discussed. The document was produced by NAPA under its cooperative agreement with the FHWA. Read the tech brief here.
Sustainable Strategies for Asphalt Pavement Webinar
On May 19, at 1 p.m. Eastern, FHWA will host a webinar on sustainable strategies for asphalt pavements. The session is the first in a five-part webinar series discussing the details of FHWA’s ” Towards Sustainable Pavement Systems: A Reference Document.” The new reference document was created with industry representation and covers sustainability in all aspects of the pavement life cycle from materials, design, and construction through the use, maintenance/preservation, and end-of-life phases. NAPA Director of Sustainable Engineering Dr. Heather Dylla participated in the Sustainable Pavements Technical Working Group, which reviewed and shaped the final document. Registration for the webinars is free and PDHs will be provided.