1 minnesota’s experience in implementing the use of shingles roger olson research operations...
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Minnesota’s Experience in Implementing the Use of
Shingles
Roger OlsonResearch Operations EngineerMinnesota Dept. of Transportation
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History in MN Based onManufacturers’ Shingle Scrap
• Mn/DOT and U of MN lab tests (Newcomb, 1993)
• Willard Munger Trail (1990)
• Hwy 25 south of Mayer, MN (1991)
• Scott County Hwy 17South of Shakopee, MN (1991)
• Hennepin County France Avenue (2002)
• U.S. Highway 10 – (2006)
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TH 25 Test Section
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First Mn/DOT SpecAdopted in 1996
• Allowed 5% recycled asphalt shingles (RAS)
• Allowed in wear and non-wear courses
• Job-by-job approval by Project Engineer required
• Added like recycled asphalt pavement (RAP)
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Mn/DOT Spec “Guidelines” (circa 2000)
• On file with Bituminous Office
• Contaminants must be removed
• Certification of supply required
• Manufactured waste only
• Mn/DOT to certify suppliers
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• Mn/DOT specification 2360/2350 – 5% manufacturers RAS allowed- approval now permissive (2004 spec change)
• Virgin asphalt binder must be70% or greater of total in HMA(2006 spec change)
Spec Implementation
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Tear-off Shingle Pilot Projects
• City of St. Paul (2003)
• Dakota County / OEA Lab Study (2005 – 2006)
• Hassan / Omann (2006)
• Ramsey County Lower Afton Trail (2007)
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Ramsey County LAT Project:Tear-off Shingle Spec
• Funded in part by Mn/DOT State Aid
• County approached Mn/DOT
• Specification was drafted by Mn/DOT with guidelines
• Ramsey County reviewed and approved specification
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On–Going Research
• Minnesota SWMCB – Mn/DOT“Technical Working Group”
• Research Grant from Mn/PCA ($50,000)
• Future Mn/DOT Participation inFederal / State Pooled Fund Study
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