Foamed Bitumen Stabilisation
Foamed Bitumen Stabilisation (or Insitu Low Order Asphalt) is a process
gaining widespread acceptance within the industry. It enables
recycling and upgrading of existing pavement
materials producing a product comparable to deep lift
asphalt at far less cost.
 The process varies from other forms of bitumen
stabilisation in that it uses the reaction of hot bitumen and water to
expand the bitumen to up to 15-20 times its original volume before being
injected into the pavement material. The foaming process fundamentally
changes the mixing properties of the bitumen. Foamed bitumen coats the finer
particles ( but not the larger particles) to form a mastic to bind the
mixture.
Foamed Bitumen mixes can achieve stiffness comparable to CTB's whilst
remaining flexible like asphalt, to provide superior fatigue.
 SPA
Stabilfoam is state of the art foamed bitumen stabilisation carried out by
Stabilised Pavements of Australia (SPA), using one of our Wirtgen WR2500's.
This large Reclaimer/Stabiliser
has the most advanced foam bitumen system in the world, taking the emerging
foamed bitumen stabilisation process to the controlled, high quality and
safe situation that modern production requires.
The machines used in the SPA Stabilfoam process add the necessary water
for the required moisture content through the mixing box, at the same time
as adding bitumen via a separate spray bar. Both the water and bitumen
injection systems are controlled electronically by computer
 for unequalled accuracy. This eliminates
uncontrolled water addition by water carts operating in advance of the
mixer. The accuracy of the bitumen injection is far superior to other
machines.
SPA can also provide on site test foaming facilities to ensure that the
actual field foaming and mixing properties are those obtained in the
laboratory.
SPA's stabilisers are by far the most powerful Reclaimer/Stabiliser
equipped with a foamed bitumen system in Australia, with the required power
of in excess of 500hp, producing superior mixing and consequently longer
pavement lives.
 These
advantages in quality and control are sometimes hard to quantify in dollars
in the short term but result in huge savings over the road pavements' life.
Read report on Australia's largest
ever Foamed Bitumen Stabilisation Project.
View more images
For more information Contact Us.
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