Potential Alternatives to Landfill

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Potential Alternatives to Landfill for Scrap Tires
The Water Tower Inn Sault Ste. Marie
Ontario March 11, 2005
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Begin with the end in mind!
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Difficulties of Processing Scrap Tires

• Logistics move those tires
• Technical machinery and maintenance
• Financial sustainability and profitability
• Purpose
• Why are we collecting and processing scrap tires?

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Why Process Scrap Tires?

• Should be net profit not short term cash flow
• The broken business model
• Tipping fee cash flow
• Push product to customer? warehouse of crumb
• Limited value creation
• Result failed businesses
• Market Pull
• Develop market
• Field Turf applications
• Demand will dictate how to process tires
• Marketing is Everything

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Hawrelak Park eg.

• Safe surfacing, meets CSA Standard
• Accessible, meets new Accessibility Standard
• Diverse range of opportunities for all ages and
  levels of ability/ disability

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Tire Derived Aggregate TDA
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Leachate Collection SystemsQA / QC Program
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Leachate Collection SystemsTire Shred vs.
Aggregate

• Possible Disadvantages of Shred
• May contain excessive dirt, metals, fines, etc.
• Protruding wire puncture rubber tires
• Compatibility with synthetic liner material
• Higher compression characteristics
• Possible leaching of inorganic ions
• Available supply?

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Leachate Collection SystemsTire Shred vs.
Aggregate

• Advantages of Shred
• Higher permeability / hydraulic conductivity
• Light weight transport placement
• Less spearing into compacted clay liners
• Reduces demand for non-renewable resource
• Absorbs organic contaminants in leachate?
• Subsidization by Alberta TRMA

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Summary

• TDA is very well suited for current uses in
  Albertas cold climate conditions
• TDA has some distinct advantages vs. aggregate
  (non-renewable resource) in these applications
• Use of TDA has been critical to the reduction of
  Albertas whole tire stockpiles
• All Albertans rely on landfills and thus benefit
  from use of TDA as a risk management tool in
  these facilities

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Range of cold climate applications

• Insulation to limit frost penetration beneath
  roads
• Insulating backfill behind walls
• Lightweight fill for roadway over peat bogs and
  weak clay
• Insulating fill for highway edge drains
• Septic system leach fields

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Completed Project
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Maximum frost penetration
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Why use TDA for retaining wall backfill?

• Low unit weight (0.8 Mg/m3 50 pcf)
• Free draining (k gt 1 cm/s)
• Good thermal insulation (8 x better than soil)
• 100 tires per m3!

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EcowallSystem
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Ecopave System
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Conclusions

• Cold regions uniquely suited for TDA
• Low thermal conductivity, high permeability, and
  low unit-weight key properties of cold regions
• Effective as roadway insulation/drainage
• Effective as lightweight fill
• TDA has significant potential for growth in cold
  regions

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Albertas 2002 Projects
International Surfacing Systems equipment set-up
for blending crumb rubber and base asphalt
concrete now owned/operated by Fath Industries
Loading Crumb Rubber into the Hopper
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Albertas 2002 Projects
Twin pavers in echelon on 137 Avenue
Paving on Highway 630
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Advantages of AR binder

• significantly increases viscosity and
  visco-elastic properties of binder
• allows higher binder content
• provides thicker film thickness on aggregates
• reduced aging of binder
• increased softening point of binder
• reduced temperature susceptibility of binder
• improved low temperature properties of binder

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Resources
The Rubber Association of Canada http//www.rubber
association.ca/ Rubber Recycling
2004 www.rubberassociation.ca/RR2004presentations.
html Canadian Association of Tire Recycling
Agencies www.catraonline.ca/ Ontario Tire
Stewardship www.ontariotirestewardship.ca/ David
Lamb E-mail david_at_rubberassociation.ca