What is Recycling asphalt?
Recycled asphalt is the material removed from damaged road surfaces and roofing materialsRecovered asphalt is a feed stock in the manufacture of new asphalt. It typically has a 5 percent concentration in the new asphalt, though this proportion may rise to 30 percent. It is a surface for minor roads such as farm roads or private driveways. Asphalt road surfaces damage periodically due to foundation subsidence, drainage problems or surface adhesion failure. The surface hardens cracks and crumbles over time. The chemical composition of asphalt does not change. The removal of the damaged surface using pneumatic or hydraulic breakers produces a waste product called road planning. The asphalt in these planning is a granular material compared with the continuous texture of new asphalt. Asphalt is 100% recyclable over and over.
In time for Earth Day,
and FHWA have released a new survey of sustainable construction practices in
the asphalt pavement industry. The survey, which covers the 2011 construction
season, studies the usage of reclaimed asphalt pavement (RAP), recycled asphalt
shingles (RAS), and warm-mix asphalt (WMA). The use of recycled materials in
asphalt pavements saved taxpayers more than $2.2 billion dollars during the
2011 paving season. NAPA
According to the survey, about 21.2 million barrels of liquid asphalt binder were saved through the use of RAP and RAS during 2011. As early as 1993, the Environmental Protection Agency and Federal Highway Administration identified asphalt pavement as
recycling # 1 product in the . A wide
range of waste materials are now incorporated into asphalt pavements, including
ground tire rubber, glass, foundry sand, slag, and even pig manure, but the
most widely used are reclaimed asphalt pavement (RAP) and recycled asphalt
shingles (RAS). The use of recycled materials in asphalt pavements saves
hundreds of millions of cubic yards of landfill space each year. USA