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Hot-in-place® recycling (HIP®AR) has been evolving for more than 50 years. Green Roads Recycling® uses a “two-step process” that recycles 100% of the existing asphalt to a depth of 50 millimetres (≈2 inches).

This is Accomplished by:

  • Heating the existing road to soften it, which makes it possible to remove two layers of asphalt
  • Mechanically combining those two layers and mixing in a rejuventating agent and/or additional new asphalt
  • Laying the newly-mixed asphalt down to create the new road surface

In other words, HIPAR® recycles all the existing oil and aggregate in the road and lays it down in one fluid motion to a like-new condition.




  1. Operating ParametersDeteriorated asphalt pavement.
  2. Pavement section heated by infra-red heaters prior to milling.
  3. Floating milling heads remove outermost third of highway lane to a depth of 25mm.
  4. Hot milled material is windrowed into centre lane.
  5. A milling head, at the front of the B unit, mills to another 25mm.
  6. If specified, virgin mix or asphalt rejuvenates, may be applied at this point.
  7. Newly exposed surface is heated across full lane width.
  8. Full width mandrel, mills heated surface to a depth of 25 to 35mm.  All material is augered into centre lane.
  9. The material is thoroughly mixed and elevated into a twin shaft pugmill and then into the paver hopper.
  10. A new mat 50mm deep is laid by conventional screed.  The original elevation will be achieved after rolling. 


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