making greenways greener: developing a sustainable trail in ramsey county ramsey county 2007 lower...
TRANSCRIPT
![Page 1: Making Greenways Greener: Developing a Sustainable Trail in Ramsey County Ramsey County 2007 Lower Afton Road Trail Project By Commissioner Victoria Reinhardt](https://reader036.vdocuments.mx/reader036/viewer/2022070111/5515727655034691418b511d/html5/thumbnails/1.jpg)
Making Greenways Greener: Developing a Sustainable Trail in
Ramsey County
Ramsey County 2007 Lower Afton Road Trail Project
By Commissioner Victoria Reinhardt
andBridget Beck
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Deciding to Build a Green TrailPolicy Background
• Citizens want a trail for Bike and Ped Safety
• Parks and Corrections own the land
• Segment is short and is a vital connection for the East Metro trail system.
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Waste Shingles as a Resource
• Shingles are 15.2% of Construction and Demolition Waste (2006)
• 300,000 Tons of Roofing Waste per Year
• 20% of Demolition Landfill Space. (2004)
• 91% of Residential Roofing Waste is Asphalt Shingles
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Collaboration for Results
• Recognizing the role that everyone plays
• Public health has the material
• Public Works has a potential market
• Parks has a project to help demonstrate the use of post consumer tear off shingles.
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Project Overview
• Project Consisted of Utilizing Recycled Products– Tear Off Shingles in Bituminous Mix– Recycled Plastics in Retaining Wall – Recycled Plastic/Rubber Pavers– Class 7 Aggregate (“gravel”) base– Reuse of sand in Rain Gardens– Benches have recycled plastics– Utilizing natural soil erosion material– HDPE Pipe– Natural Products
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Bituminous Pavement Design
• Project was State Aid approved
• Mn/DOT Engineered HMA Spec.– Early involvement of Mn/DOT– County required 5% tear off shingles!– Option to have RAP – Utilized type PG 58-28 virgin asphalt binder oil– Minimum of 70% virgin asphalt binder in mix
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LAT Project RAS Spec
– Shingles shall be ½-inch minus– Free of nails, other metal, plastic, wood, glass,
other debris (less than 0.5 percent)– County to approved plans for:
• Where to source the tear-off shingles supplies
• How debris will be sorted out from shingles
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LAT Project RAS Spec(continued)
– Suppilers written certification that the shingles are in compliance
– County and Mn/DOT staff shall inspect recycling operations
– Samples of final RAS product shall be provided to County and Mn/DOT
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Source of Sorted Shingles
• 75% sorted on site at the roofing job– J Zac, Inc. roofing company– Hauled by Veit– Minor contamination
• 25% supplied from transfer station– Veit Industries– Minimal contamination
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Omann’s Grinding Process: Phase I
• Ground to 8” minus
• Removed 95% of nails
• Removed most of the remaining contamination
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Omann’s Grinding Process: Phases II and III
• Removed remaining nails• Removed all metallic material• Ground shingles to a very fine consistency
7/16 – inch minus• Provided very clean product
to Midwest Asphalt
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• Utilized oil in shingles as partial replacement of virgin asphalt oil
• Used recycled shingles at 5% in place of recycled asphalt pavement (RAP)
Bituminous Supplier & Installer:Midwest Asphalt
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Project Notes
• Normal request for bids– Multiple bidders
• Supports MN/DOT tear-off research
• Technical feasibility not economic costs and benefits– Savings on asphalt binder
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Concerns/Lessons Learned With Tear off Shingles
• Warm weather• Wind• Ground Shingle stockpile - tacky• HMA – tacky
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Making Greenways Greener: Developing a Sustainable Trail in
Ramsey County
Presenters:Ramsey County Commissioner
Victoria Reinhart – 651-266-8363Bridget Beck – 651-266-7121