Case Studies


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Overviews

Downer has partnered with the City of Onkaparinga and Close the Loop to set a new benchmark in sustainability and innovation, constructing the first road in South Australia utilising Reconophalt, an innovative asphalt product that contains a combination of recycled soft plastics, toner and glass.  Downer is proud to take a lead role in repurposing valuable waste materials, creating a sustainable, cost effective solution with improved performance characteristics over conventional asphalt.

The road constructed in Happy Valley with recycled soft plastics, toner and glass demonstrates the economic, social and environmental value of products that otherwise end up in landfill, stockpiled, or as a pollutant in our natural environments.

More importantly, utilising soft plastics and glass in road construction proves that with thought leadership  in sustainability and partnerships with progressive and environmentally conscious governments, suppliers and customers, we can continue to set new benchmarks in repurposing and recycling waste materials into new streams of use.

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Recycled content breakdown


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Every 1km of road (2 lanes) paved with plastic and glass modified asphalt will use approximately:

  • 530,000 plastic bag equivalents
  • 168,000 glass bottle equivalents
  • Toner from 12,500 used printer cartridges.
  • 134 tonnes of reclaimed road (asphalt) re-used, with the inclusion of 20% Reclaimed Asphalt Pavement (RAP).
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Local procurement


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  • The recycled materials used in this trial are sourced from metropolitan Melbourne, not only saving transportation costs but also delivering an avenue for local Councils to repurpose and recycle waste materials into their road assets.
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Sustainability credentials


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Plastic and glass modified asphalt contains:

  • Soft plastics and glass that would likely end up in landfill,stockpiled, or as a pollutant in our natural environment
  • Greater than 25% total recycled material content.
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Innovative partnerships


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  • Downer partnered closely with resource recovery and recycling companies Close the Loop and RED Group to innovatively tailor the soft plastic product offering to suit a road construction application.
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Improved performance


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Compared to standard VicRoads specified asphalt,plastic and glass modified asphalt has:

  • 65% improvement in fatigue for longer life pavements
  • Superior deformation resistance for withstanding heavy vehicular traffic.