Product Information
Polyroad Stabilising Process
|
How Polyroad Works |
What
Happens When Gravel Gets Wet |
| Structural
Failure of Roads | Design
Considerations |
| Recommended Testing &
Assessment | Selecting the Right
Binder Type |
Polyroad stabilisation is especially suited for treating moderate to
poor quality gravels that lose considerable strength when wetted up. They
also have particular application to regions of high water tables, periodic
flooding of pavements and even during prolonged drought conditions.
Polyroad stabilised pavements increase rut resistance (less moisture
sensitive) as well as protect the subgrade. The subgrade is more protected
because there is minimal to no deformation of the stabilised pavement
itself. It is important for a stabilised pavement to function as an
'impermeable', non-cracking protection of the subgrade to improve its
volume stability.
Polyroad stabilisation does not lead to shrinkage and load-induced
cracking of the pavement. This is because access of surface water through
cracks to the subgrade does not occur and there are no granular pavement
cracks to reflect into the overlying, fatigue-prone asphalt or sprayed
seals. Polyroad stabilised pavements have reduced deformability and
functions as a flexible, low permeability protective barrier to the
subgrade.
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Polyroad Reduces Moisture Ingress
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 It is recommended that normal basic soil
parameters are determined such as MDD, OMC, grading and plasticity
indices. Capillary Rise and Swell Test Method AS1141.53 is strongly
recommended particularly from an observation perspective besides measuring
rise and swell. You will observe the Polyroad stabilised samples do not
collapse or deteriorate (ensure sufficient fines are available) and can be
'man-handled' after 72 hours in water.
CBR testing is also recommended to record strength growth when
stabilised with Polyroad. Compare results between parent material from its
natural state and when stabilised with Polyroad, both soaked and unsoaked.
Polyroad is not suited to macadam pavements (large voids) or single
sized coarse sands (Polyroad does not involve chemical reactions of
particles to bridge voids).
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Many hundreds of kilometres of Polyroad stabilisation have been
successfully
carried out to date without failure or minor repairs.
(Based on adequate pre-construction testing and competent construction.)
|
How Polyroad Works |
What
Happens When Gravel Gets Wet |
| Structural
Failure of Roads | Design
Considerations |
| Recommended Testing &
Assessment | Selecting the Right
Binder Type |
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|
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