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 Summary of 3rd Asphalt Shingles Recycling ForumAs of 12-18-2007

Volumetrics force sizing RAS to similar sizes as virgin materials (1/4-inch minus preferred, but ½-inch minus is OK)

Pre-blending finished RAS with 20% bituminous sand is one of the best ways to prevent reagglomeration of high-AC recycled shingle piles:

Multiple “sizing” of RAS can be similar to and parallel with the multiple sizing of RAP and controlled feeding of multiple recycled sizes into a modern HMA plant:

CLOSING PLENARY:

Dan Krivit, DKA “Recycling Tear-Off Asphalt Shingles: Best Practices Guide” 651-489-4990; DKrivit@bitstream.net www.ShingleRecycling.org

“Recycling Tear-Off Asphalt Shingles: Best Practices Guide”, prepared for Construction Materials Recycling Association, prepared by Dan Krivit and Associates (DKA), October 11, 2007.

Summary of key elements in maintaining quality assurance / quality control throughout the various stages of the shingles recycling process including:

Development of supply, sorting

Processing (grinding, screening, storing of final RAS product)

End-use application (e.g., HMA production, use as an aggregate, etc.)

 Prepared by ShingleRecycling.org and DKAPage 10 of 11

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