Recycling asphalt shingles

Recycling asphalt shingles

piles of shingles

Minnesota annually generates 500,000 tons of post-consumer shingles.

An asphalt shingle contains the same basic ingredients as hot-mix asphalt: aggregate, asphalt cement, and mineral filler.

Laboratory and field testing by researchers at the University of Minnesota and the Minnesota Department of Transportation (Mn/DOT) shows that scrap from asphalt shingle manufacturers (pre-consumer) can be used successfully in hot-mix asphalt. Based on this success, Mn/DOT has issued specifications that allow for the use of up to 5 percent manufacturers' shingle scrap in hot-mix asphalt.

Research and development continues on uses for tear-off roofing waste (post-consumer). Nationally, an estimated 11 million tons of used shingles are landfilled each year.


Toolkit: A guide to the use of roofing shingles in road construction

Fact sheets and additional information about the use of shingle scrap in hot-mix asphalt and other paving applications.

A project of the Minnesota Department of Transportation and the Minnesota Pollution Control Agency.

Bituminous Roadways

HTML icon Bituminous Roadways (Minneapolis, Minn.) has developed an improved processing system for turning shingle byproduct from the manufacturing process into asphalt for roads. Use of 5 percent shingle byproduct improves the performance of hot-mix asphalt, and is cost-effective, with potential cost savings from $0.50 to $1 per ton. BR is currently using 25,000 tons of shingle manufacturing scrap. BR has used the product in mixes for parking lots and residential and commercial roads.

BR is also involved in testing the use of post-consumer tear-off shingles in hot mix asphalt. This next phase will develop a national engineering and environmental specification for the approximately 500,000 tons of post-consumer shingles generated in Minnesota each year.

For more information

Contacts

Use these contacts for more assistance on the use of shingle scrap in paving applications.

  • Improving Recycling of Shingles in Minnesota project:
    James Klessig < jim.klessig@dot.state.mn.us >, Mn/DOT Office of Research Services, 651-282-2472
    line
  • Technical assistance on mix-design approvals involving shingle byproducts in Minnesota:
    Roger Olson < roger.olson@dot.state.mn.us >, Mn/DOT Office of Materials and Road Research, 651-779-5517
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  • Consultant technical assistance in Minnesota:
    Dan Krivit < dkrivit@bitstream.net >, Dan Krivit and Associates, 651-489-4990
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  • Shingle recycling and product development operations in Minnesota:
    Kent Peterson < petersonk@bitroads.com >, Bituminous Roadways, Inc., 651-686-7001

Technical reports

Brochures

Conferences and workshops

Web sites