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Jim Dykes President Dykes Paving & Construction Inc. Atlanta, Georgia

ASPHALT SHINGLE RECYCLING. Jim Dykes President Dykes Paving & Construction Inc. Atlanta, Georgia. Presented at: The 3 rd ASPHALT SHINGLE RECYCLING FORUM. Why We Recycle. Rising costs and increased restrictions for landfills 11million tons of shingle waste is produced each year

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Jim Dykes President Dykes Paving & Construction Inc. Atlanta, Georgia

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  1. ASPHALT SHINGLE RECYCLING Jim Dykes PresidentDykes Paving & Construction Inc. Atlanta, Georgia Presented at: The 3rd ASPHALT SHINGLE RECYCLING FORUM

  2. Why We Recycle • Rising costs and increased restrictions for landfills • 11million tons of shingle waste is produced each year • Less than 5% of shingle waste is recycled

  3. Benefits to Recycling • Shingles are composed of 20% to 40% liquid AC • Fiber and polymers from shingles can add strength to mix design • Can be added to HMA to offset liquid AC costs or to create new mixes

  4. Bottom Line • An available 11 million tons of shingle waste, containing 20% liquid AC • 2.2 million tons of reclaimable liquid AC • At $300.00 per ton that’s $660 million worth of liquid asphalt every year DO THE MATH!

  5. Shingle Waste The Process 5/16” Minus 5/16” to 3/4” *Larger material is normally wasted as by product. However, we further process this material. Closed Loop System

  6. Sort and Prep • Remove any unwanted trash from shingles such as wood or metal • Paper may stay on manufacturer rejects

  7. Problems to Overcome • Tear-offs • Intensive pre-processing • More contamination than manufacturer rejects • Smell from mold • Environmental Issues • Dust control • E.P.A. regulations concerning stockpile locations and size.

  8. Problems to Overcome • Allocating space • Locations for equipment • Covered or enclosed area to keep stockpile cool • Crossing the economic barrier • Most unsuccessful attempts to recycle and incorporate shingle into mixes are due to improper sizing • Best approach is to add the extra equipment necessary to process shingle down to sufficient size

  9. Equipment Primary Shredder

  10. Equipment Double Deck Screen

  11. Equipment Hammer Mill

  12. Equipment Covered Stockpile

  13. Equipment Loader

  14. Shingle Sources Manufacturer Rejects Post Consumer Waste “Tearoffs”

  15. Products • Hot Mix Asphalt • Cold Mix • Dust Control

  16. Hot Mix Asphalt Shingles breaking down as they enter hot mix

  17. Perma Flex®

  18. Perma Flex® Solves Reflective Cracking Problems

  19. Dust Control

  20. Cold Mix Asphalt

  21. Cold Mix Designs

  22. Loaded Wheel Test • Study Showed that Blend 1, with no fines, had the greatest strength • Important to note that strength increases as the mix cures. It may initially be very soft, but with time and traffic, ruts will be significantly reduced. All lab testing performed by Pavement Technology Inc.

  23. Field Test:Proving ground for new asphalt mix designs at Waste Management transfer station in Norcross, Georgia. Dykes Paving & Construction Inc.

  24. Resources The most complete information can be found at: www.shinglerecycling.orgor www.shinglerecycling.net

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