Tag Archives: asphalt

Is RAP just a black rock?

By Dr. Grover Allen, Ph.D., P.E.

If you’re reading this article, you probably already know that RAP stands for “reclaimed asphalt pavement” and is valued by users and producers alike because it can be recycled as a component of a new asphalt mixture. In addition to being resource-responsible, the use of RAP in an asphalt mixture means that at least some portion of the reclaimed asphalt binder can be used to offset the amount of new asphalt binder used in the mix. But how much of that reclaimed asphalt binder is actually available to act as a binder and how much is too hard to serve that role – acting more like a black rock?


Asphalt Day is May 15

Asphalt Day on May 15 celebrates the many economical and efficient uses of liquid asphalt in roofing and paving. The Asphalt Institute introduced this annual observation in celebration of the members of their century-old trade association and the industry across the globe.

Studies show that 94 percent of all U.S. roads use asphalt and 80 percent of U.S. residential roofs use asphalt roofing shingles. This day increases awareness of asphalt roofing and paving products while demonstrating their resiliency and growing sustainability.