State and paving industry draft hot mix asphalt specification to allow recycled asphalt shingles
The Washington State Department of Transportation (WSDOT) and the Washington Asphalt Pavement Association (WAPA) are outlining requirements and next steps for a paving trial project that would allow recycled asphalt shingles (RAS) in the design, production and acceptance of hot mix asphalt (HMA) in Washington. A technical committee, co-chaired by WSDOT and Granite Construction(external links), is leading the development that could mean RAS use on select WSDOT paving projects in 2012.
Asphalt Shingles
A hot mix asphalt market for recycled asphalt shingles has begun to develop in Washington state.
An estimated 40,000 tons of asphalt shingle waste generated in King County is disposed each year.1 While some shingles are being recycled, local end markets for the material are not well established. Asphalt shingles are processed into a ground product and successfully recycled in other states for road applications such as hot mix asphalt (HMA) pavement and cold patch.
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. Learn more about the Shingles in Paving Project, including a paving demonstration–the first in Washington State–to test the use of RAS in HMA.
Check back regularly for updated news and resources on what's happening with RAS in King County and across the country.
