AustStab - Construction

Construction

Contractors | Accreditation | Equipment | Specifications | Tips

The stabilisation of subgrade and pavement materials may be carried out by insitu or stationary plant mix procedures. Unfortunately not all practitioners reap all benefits of road stabilisation due to poor construction techniques, such as the use of grader blade mixing. As with all, road building, materials and good construction practice are recommended to achieve optimum performance of the process. In addition, poorly maintained equipment such as worn out vanes in a pug-mill, may lead to poor mixing of the binder and material, and hence variable results.

To achieve best results from road stabilisation, please consider:

• Use of a suitable specification with sound compliance measures
• An accredited contractor with technical and quality management skills
• Use of specialist stabilisation equipment
• Compaction the stabilised material as soon as possible after mixing

Don't cut corners and get the job right first time!

The following information is found on this web page:

• List of contractors
• Details about the contractor accreditation system
• List of equipment suppliers who are AustStab members
• Copies of AustStab model specifications
• AustStab construction tips

Contractors
In Australia, road stabilisation contractors have generally evolved as specialists road construction organisations that have built up their expertise in stabilisation and profiling works. There are also some larger firms which offer road stabilisation expertise through a division of the company which internally and externally bids for work. Unlike other countries, equipment suppliers or rental companies do not engage in road stabilisation projects in Australia.

AustStab members who own up to two stabilisers/reclaimers and these members are know as Category B members, whereas the large companies operate over five stabilisers/reclaimers and they are Category A members. For more information about contacting a member in your region, click here.

Accreditation

In the interests of setting and maintaining World’s best practice standards in the industry, AustStab has established an accreditation system for insitu and pugmill stabilisation contractors to meet best construction practice and hence best value, for road authorities under their tendering or quotation systems.

A brief synopsis of the main points of the system are:

• Expertise of staff:
-       Managerial staff
-       Supervisory staff
-       Management system representatives
-       Operators

• Management systems:
-      Management of risk
-      Quality systems
-      OH&S
-      Environmental management

• Proven capability:

• Awareness and commitment to using AustStab’s technical standards

•  Plant and equipment requirements:
-      Binder spreaders
-      Stabilising mixers or reclaimer/stabilisers
-      Other equipment

The following contractors are accredited in the following regional areas:

NSW and ACT

Downer EDi Works

Stabilised Pavements of Australia

Stabil-Lime Distributors

Download accreditation document Version 1.0 in PDF format (106 kB)

Queensland

Stabilised Pavements of Australia

Stabil-Lime Distributors

Download accreditation document Version 1.0 in PDF format (106 kB)

Tasmania

Andrew Walter Constructions

Downer EDi Works

Victoria

Downer EDi Works

Stabil-Lime Distributors

Stabilised Pavements of Australia

Download accreditation document Version 1.0 in PDF format (106 kB)

South Australia

Downer EDi Works

Stabil-Lime Distributors

Stabilised Pavements of Australia

Download accreditation document Version 1.0 in PDF format (106 kB)

Western Australia

Companies not listed yet.

Northern Territory

Companies not listed yet.

For further information on contacts in various regions of Australia click here.

Equipment suppliers

The following companies are members of AustStab and supply road construction equipment for road stabilisation and road recycling. The companies are listed alphabetically.

This information will be continually updated and where applicable web links are noted for further information.

Caterpillar of Australia

Contact: Garry Sutcliffe Private Mail Bag 4, Tullamarine, VIC 3043

TEL: 03 9953 9265

Clark Equipment

Contact: Tom O'Sullivan 89 Colebard Street West, Acacia Ridge, QLD

TEL: 07 3712 1800

Conplant Pty Ltd

Contact: Jim Harris PO Box 2017, Smithfield NSW 2164

TEL: 02 8788 2900 FAX: 02 9725 2808

Dynapac Australia

Contact: Jorge Boil 132 Toongabbie Road, Girraween NSW 2145

TEL: 02 8868 9700 FAX: 02 9769 1024

Wirtgen Australia Pty Ltd

Contact: John Geary 2-12 Sommerville Circuit EMU PLAINS NSW 2750

TEL: 02 4735-2699 FAX: 02 4735-6711

Specifications

In attempt to optimise the road stabilisation process, AustStab has produced model specifications for use by Councils and Shires, State Road Authorities and major contractors involved in DCM style contracts. A working group in AustStab prepares and maintains these model specifications which are aimed at specifying stabilisation of local and main roads for both urban and rural areas. These specifications can be adopted in all regions of Australia.

In the specification there are options to include and deleted paragraphs and clauses based on the contractual requirements and practices by Councils, Shires and SRAs in Australia. At the end of the specification, is a schedule of rates that is required to be completed by the contractor in their submission to the tender documents.

These model specifications are freely available to Australian engineers and members of AustStab for Australian road projects. To request a copy of the model specification (In WORD format) you need to send an email to G Vorobieff providing the following information:

Name
Title
Organisation Name
Mailing Address:
Telephone No:
Facsimile No:
Specifications requested:

A copy of the specification will be sent to be return email.

The current list of model specifications are noted below. You can download the commentary and specification in Acrobat format for free.

Model Specification 1 - Insitu Stabilisation of Local Government Roads with Cementitious Binders including Lime (Version D - Minor changes)

Model Specification 2 - Insitu Stabilisation of Local Government Roads with Bituminous Binders (Version C - Minor changes)

Model Specification 3 - Insitu Stabilisation of Main Roads with Bituminous Binders (Version B)

Model Specification 4 - Plant-mix Stabilisation of Main Roads with Bituminous Binders (Version A)

Model Specification 5 - Insitu Stabilisation of subgrades and pavement materials using lime for Local Government Roads (Version B)

Model Specification 6 - Insitu stabilisation of subgrade materials using lime for main roads (Version A)

Model Specification 7 - Insitu Granular Stabilisation of Local Government Roads (Version A)

Model Specification 8 - Model Specification for Supply of Limestone for Acid Sulphate Sites (Version A)

Model Specification 10 - Insitu Stabilisation of Local Government Roads using Insoluble Dry Powdered Polymers (Version A)

Construction tips

AustStab provides the following construction tips for students and practitioners to better understand the equipment and procedures commonly used in the road stabilisation industry. Please note the normal copyright rules apply to these Tips so please read the warning on these documents.

Profilers versus stabiliser

Understanding the difference between stabilisers, reclaimers and profilers. [Version A]

Skidsteer stabilisers

Suitable short-term patching using stabilisation principles. [Version B]

Two-pass mixing

Mixing the powder binder is crucial to the success of stabilisation.

Stabilisation patch width

Provides practical advice on how best to dictate the width of a rehabilitation patch.

The steam cloud emanating from the slaking of quicklime

Important practical OHS advice on the slaking process of quicklime.

Pavement crossblending prior to stabilisation

Best practice techniques for crossblending prior to insitu stabilisation.