Tear-off Asphalt Shingles RecyclingRoofing Contractors

Association of WashingtonBi-Annual MeetingNovember 3, 2011

• Works to facilitate development of …– end markets for recyclable materials– collection and processing infrastructure that supplies markets

• 2011 focus materials: mattresses, carpet and asphalt shingles

• 29,000 tons of used asphalt shingles generated in King County

• Small but growing percentage recycled

• Valuable resource disposed

• Single market that’s still developing

Asphalt Shingles: status

• Recycled Asphalt Shingles (RAS) – – Ground asphalt shingles– Nails removed by magnet– Screened to specified size (gradation)– Tear-Off (post-consumer)

RAS

• Use RAS in hot mix asphalt (HMA) for pavements– Roads– Parking lots– Facilities– Trails

Opportunity

National use of RAS in HMA

27 states allow RAS use on publicly-owned roads.

Benefits of using RAS in HMA

• Quality pavement—equivalent to traditional pavement

• Increase project sustainability– Using a recycled-content product– Reducing greenhouse gas emissions– Obtaining points for green building project certification

• Increase availability of HMA product containing RAS– We are encouraging agencies ask for the product– Increase shingles processing capacity (economic and jobs benefits)– Reduce the cost of paving

Local Roofers & Shingles RecyclingCalls with 3 Puget Sound roofers indicate high interest

in recycling shingles– Benefits cited:

• cost savings, convenience, and doing the right thing– Considerations raised were making collection easy

(separation requirements, facility distance) and confidence in long-term viability (future end markets)

– Information needs• more on Seattle’s proposed disposal ban• local recyclers• commercial roofing recycling options

Local experience using RAS

• King County Roads– demonstration project• King County Solid Waste Division– Bow Lake Recycling & Transfer Station– Factoria Recycling & Transfer Station– Maintenance contract

• King County Parks– Aquatic Center parking lot

• Some commercial paving customers• But, what about Washington State DOT?

RAS and HMA specifications

Pave wear course with 3% RAS with 15% RAP

Collect local engineering data; conduct performance testing

Design considerations: • Minimize risk• Performance over time• Health, env. and safety

standards• Recognition by industry and

public agencies

Shingles in Paving Demonstration

Establish a strong local paving end market for recycled asphalt shingles (RAS) that captures the resource value of shingles and diverts this material from landfills

Key Demonstration Partners

Project Sponsor

Key Partner & Target Audience

Contractor

Roofing & Asbestos

For the demonstration:• Used asphalt shingles only

• Inspections of incoming loads

• Rigorous sampling and testing

What we learned:• Shingles themselves are a low risk• Important to ID asbestos on roof• Important to inspect roofing loads at

disposal and recycling facilities

Road Selection and Study DesignRoad selection criteria • Overlay paving• Two miles in length • Consistent pavement and subsurface conditions• Two-lane with limited variable surface conditions

Test Section #1

Test Section #2

Test Section #3

Test Section #4

1000 tons/day ½ mile ½ mile ½ mile ½ mile

Lane 1 (eastbound)

HMA Mix with 15% RAP

HMA Mix with 3% RAS and 15% RAP

HMA Mix with 3% RAS and 15% RAP

HMA Mix with 15% RAP

Lane 2 (westbound)

HMA Mix with 15% RAP

HMA Mix with 3% RAS and 15% RAP

HMA Mix with 3% RAS and 15% RAP

HMA Mix with 15% RAP

SE 416th St (near Enumclaw)Paving completed in September, 2009

Extensive material engineering tests conducted.

Initial results“…[n]o negative effect on pavement performance. “

1-year“…no significant effect, favorable or detrimental, on pavement performance.”

NextTesting through 2012, then a recommendation on continued use of RAS in King County.

Pavement Performance Results

State Effort to Allow RAS in HMALed by subcommittee of the WSDOT/WAPA Improving HMA Joint Task Force

– Started in October 2010– Objectives: review research and develop specifications

Draft specification will allow up to 5% RAS on select state paving pilot projects in 2012 (four or more)

– Require test sections for research and study

Given good pavement performance, allow use of RAS on case-by-case basis by 2014

Local Asphalt Shingle RecyclingShingle RecyclersMiles ResourcesWaste Management – GlacierCDL RecycleEvergreen Shingle Recycling

HMA Producers using RASMiles ResourcesLakeside IndustriesIcon MaterialsGranite Construction

Recycling Innovations• Roofers marketing recycling to gain market share• Roofers developing shingles recycling facilities of their own

– Missouri, Ohio, Colorado, Washington

• Shingles Manufacturers– promoting/investing in recycling

infrastructure and networks– Owens Corning– GAF Building Materials– CertainTeed Corporation

• Recyclers targeting tough materials such as commercial/flat roofing (Nationwide Foam)

Other Efforts in Support of RAS

• Puget Sound Clean Air Agency – Based on data LinkUp provided, PSCAA dropped asphalt shingles from asbestos suspect materials list

• Pushing the market– HMA producers are asking to use RAS on public projects– LinkUp program• Encouraging more King County projects and other local

governments to require RAS• Building a business case for why the state DOT should

allow RAS use sooner than later

Other Efforts

• City of Seattle – shingles disposal ban– Preparing its Solid Waste Management Plan– Draft plan includes proposed construction &

demolition material disposal bans– asphalt shingles in 2014– There will be a public hearing on the final plan to

gather any last input– For questions about the plan or process, contact

Gabriella Uhlar-Heffner at 206-286-9772 (before Nov 20th, contact Hans VanDusen at 206-684-4657)

Contact

Kris BeattyKing County Solid Waste Division206-296-3740kris.beatty@kingcounty.govWebsite: see “Asphalt Shingles” at

www.kingcounty.gov/linkup