An estimated 30,000 tons of asphalt shingle waste generated in King County is disposed each year.1 While some shingles are being recycled in Western Washington, local end markets for the material are still being established. Asphalt shingles are processed into a ground product and recycled in 22 states, including Washington, for use in hot mix asphalt (HMA) pavement in road applications.
The LinkUp Shingles in Paving Project is engaging the local recycling, transportation, and paving community in an effort to establish a strong local HMA end market for recycled asphalt shingles (RAS) that captures the resource value of tear-off asphalt shingles and diverts this material from landfills.
The Washington State Department of Transportation (WSDOT) general specifications now include standard provisions for the use of RAS in HMA for road construction. Since 2014, HMA including nearly 1,500 tons of RAS has been used on state roads in Washington. See a list of projects and jurisdictions using RAS in the Puget Sound region and learn more about how LinkUp has supported asphalt shingles recycling through the Shingles in Paving Project.
Check back regularly for updated news and resources on what's happening with RAS in King County and across the country.
1 The estimate of tons of asphalt shingles disposed in King County reflects 2016 tons and is based on data provided by the King County Solid Waste Division and Seattle Public Utilities.
RAS in HMA
State departments of transportation with specs for using post-consumer RAS in HMA:
- New Hampshire
- North Carolina
- South Carolina