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

Related studies on virgin roofing asphalt, reclaimed asphalt pavement, and run-off from asphalt pavement indicated PAH concentrations below the laboratory detection limits.

PAHs are emitted during normal HMA production

Pollution control equipment reduces PAH concentrations

The effect of using post-consumer asphalt shingles on PAH emission during HMA production is unknown

A study in Texas stated they would investigate the issue of PAH emissions in HMA production. (Note: no data yet.)

It is not anticipated that clean, uncontaminated asphalt shingles would cause PAH emissions to be significantly different than virgin asphalt


Wayne Gjerde, Minnesota Pollution Control Agency “How High Will Virgin Asphalt Go? What You Can Do About It!” 651-215-0270; Wayne.Gjerde@state.mn.us


The World’s oil production is now expected to peak sooner than originally forecasted

Coal is also expected to be expended as predicted by maximum use rates

Virgin asphalt savings due to use of recycled shingles into HMA can be significant

Other less tangible benefits of recycling shingles include:

Longer term price stability for HMA producer and paving customer

Makes pricing more competitive.

Helps projects that are seeking “green” credits (e.g., LEED)

Shawn McMullen, Systech Environmental Corporation, a subsidiary of LaFarge NA “Asphalt Shingle Recycling Forum” 937-643-1240, Shawn.McMullen@lafarge-na.com


Alternative Fuel in Cement Kilns is qualified by MSDS, waste profiles, analysis, testing of loads

Each plant is tested to prove emissions meet Federal/State/Provincial Standards and requires operating permits (air and waste management).

Economics drivers of Asphalt Shingles as fuel in cement kilns:

High landfill tipping fees or landfill ban on C&D waste

Plant with specific coal mill technology & low production requirements

Limited alternative fuel choices

Change that will increase the use of Shingles as an Alternative Fuel

Legislative control to move energy waste from landfills to re-use

Increased cost of primary fuels like coal and pet coke

Development of collection, separation and processing systems to prepare shingles for fuel use

Ben Brock, Astec Industries, Inc. “Economics of RAS in HMA”

423-827-1256; BBrock@astecinc.com


About 25 contractors in North America run RAS in HMA as standard practice

675-750 million tons of HMA produced per year (or 2.25 to 2.50 per person) in the U.S.

About 18 billion tons of HMA pavement is in place today

About 3,900 HMA plants in U.S. today

77 shingles manufacturing plants in U.S. today generating about 1.3 million tons of scrap each year

8.5 million tons per year of post-consumer (tear-off) shingle scrap mostly going to landfill at a cost of $15 to $100 per ton

Volumetrics force knowing the AC content in RAS

 Prepared by ShingleRecycling.org and DKAPage 9 of 11

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