This month we review happenings, look more closely at site preparation and cross blending materials.
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News from the Centre of Stabilisation expertise in Australia

A monthly newsletter informing you of initiatives and happenings in the stabilisation industry in Australia

Dear <<First Name>>

Welcome to AustStab's 19th newsletter. In November 2013:
  • We presented a CPEE course in Brisbane and Emerald;
  • Completed audits in Queensland;
  • Began discussions in the West Coast about re-establishing a working group for WA;
  • Got some great feedback on sealing stabilised pavements technote;
  • Welcomed Robinson Civil Constructions FNQ as our newest contracting member; Hebou Constructions (PNG) as our newest overseas affiliate member and GHD as our newest affiliate members; and
  • Continued to deliver on the pillars of the association.

Please contact me for more information about any item discussed in this newsletter.

Greg White

Initial site preparation
Prior to establishing the site it may be necessary to pre-mill the site. This work should be done with a profiler, not a reclaimer. Pre-milling may be to break down asphalt layers that are severely distressed and also to eliminate oversized particles such as asphalt chunks.  

Pre-pulversing is required if:

  • depth of cut may be variable;
  • the material needs to be cross blended to achieve uniformity;
  • materials exhibit plasticity that requires modification; or
  • The recycling depth requires more power than can be constantly delivered.

See Section 12.2.2 of the Pavement Recycling and Stabilisation Guide - Site preparation - for more information.

The Guide is available to purchase through EA Books.

Pavement Cross Blending
The performance of insitu and plant stabilisation methods relies on many factors, with one of them being the uniformity of the host material or at least identifying the changes in the uniformity to allow other design factors to be taken into consideration.

Crossblending is an insitu treatment prior to stabilisation to improve the uniformity of the granular material to be stabilised with an appropriate binder. The process allows greater recycling within a pavement maintenance program.

More information is available about cross blending in the Construction Tip - Pavement Crossblending prior to stabilisation.

Click here for more information.
Hiway Stabilizers Australia specialise in the in-situ stabilisation and modification of soils and gravels for the roading, infrastructure, gas, mining and other industries.  The processes utilised for this purpose are the addition of lime, cement, cement blends and foamed bitumen to soils and gravels as a means of producing either faster or more economic results, or both.
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