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

The stiffness results indicate that the addition of tear-off RAS material increases the stiffness of the mixtures at all test temperatures.

The strength results indicate that the strength properties were not significantly affected by the addition of shingles.

U of MN, Dept. of Civil Engineering asphalt lab tests on HMA sample, gyratory “pucks” as provided by Pace Construction, St. Louis, Missouri

20% reclaimed asphalt pavement (RAP), and

15% RAP + 5% Tear-off recycled asphalt shingles (RAS)

(Note: Both mixtures contained the same virgin asphalt binder PG 54-22.)

Dr. Tuncer Edil, University of Wisconsin – Madison “Beneficial Reuse of Reclaimed Asphalt Shingles in Roadway Construction” 608-262-3552, Edil@engr.wisc.edu

Project objectives

Implications of particle size characteristics

Strength, stiffness and compactibility

Strength enhancements of aggregate-RAS mixtures using cementitious fly ash

Develop guidelines regarding the use of RAS in roadway construction (pavement, aggregate base, aggregate subbase, embankment fill and subgrade)

Roger Olson, Minnesota Department of Transportation “Minnesota Shingle Research” 651-366-5517, Roger.Olson@dot.state.mn.us

Experience:  

Mn/DOT has completed several field and laboratory studies over the last 15 years using RAS in HMA applications.

Specification Development:

Current specification allows use of up to 5% manufacturers’ shingle scrap

Use of tear-off RAS is being reviewed on a project by project basis and requires approval by the engineer.

Next Steps: examine feasibility of using tear-off shingle scrap in HMA applications

FRIDAY, NOVEMBER 2, 2007:

OPENING PLENARY:

Tom Shanahan, National Roofing Contractors Association “3rd Asphalt Shingle Recycling Forum – Business Perspective” 847-299-9070, TShanahan@nrca.net

Impediments to roofing contractors recycling shingles:

Location of recycling facility

Tipping fees

Requirements for “clean” tear-off shingles

Encouragements

Homeowners continue to inquire about recycling

Area’s reporting improvement over last few years (WI,OR,SC,NC)

NRCA can help

Promote recycling chain

Encourage recycling efforts in legislative arenas

Partner with manufacturers, recyclers and others

Vince Brulinski, GAF-ELK Corporation “3rd Asphalt Shingle Recycling Forum – A Manufacturing Perspective” 410-935-3664; VBrulinski@gaf.com

www.gaf.com

The median age of the U.S. housing stock is 34+ years

 Prepared by ShingleRecycling.org and DKAPage 5 of 11

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