Recycling….the re-use of sealed
roads
Andrew Silvestri, Account Manager ResourceCo
Roads & Works Conference – August 2012
The South Australian Road Network
Roads facts and figures as at February 2007
Road length (km)
Road categories
Sealed
Unsealed
Total
2,751
0
2,751
Urban arterial
920
0
920
Urban local
22
0
22
8,565
48
8,613
117
10,075
10,192
12,375
10,123
22,498
National highway
Rural arterial
Rural local
Totals
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INCOMING RAW MATERIALS ASPHALT
ResourceCo has developed state of the art processing facilities that are able to
manufacture a large range of quality, recycled products from various streams.
Clean Asphalt
Clean Asphalt (pictured right) consists of clean slab
asphalt and clean profilings. This material should be
contaminant free and contain only minimal amounts
of road base, clay, soils, bricks and other foreign
matter.
This material is used to manufacture:
•
•
BITUMATE®: A minus 20mm pavement material suitable for use in hard stand areas,
light duty car parks, fire and walking trails, road re-sheeting.
BITUMIX®: A minus 20mm pavement material containing a nominated percentage of
high float emulsion and suitable for use as an alternative to some traditional asphalt/hot
mix applications.
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BITUMIX®
• BITUMIX is a nominal 20mm* graded,
bitumen stabilised pavement material
manufactured from BITUMATE® with the
addition of a nominated dose rate of high
float bitumen emulsion and supplementary
binders (1% Cement or Lime).
• Source material is reclaimed asphalt removed
from road pavements and car parks by
stripping, cold planning or excavation.
• Minimal amounts of base, sub-base or other
materials may be included in the product.
• Under no circumstance is asbestos or
asbestos fibre incorporated into the product.
*10 & 14mm can be supplied upon request
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PRODUCT DEVELOPMENT
ResourceCo has invested significantly in the development of
BITUMIX®. With the assistance of a grant from Zero Waste SA in
2005, commissioned the Australian Road Research Board (ARRB)
to undertake research.
Emulsion Dosage
ResourceCo has exclusive rights to the High Float Medium Set
(HFMS) emulsion used in the manufacturing process. Dose rates
are typically in the range of 2 – 4% and are adjusted depending
on individual project needs and expected end usage.
Manufacture & Quality Assurance
BITMUX® is manufactured through our state of the art pugmill
which incorporates the specialist emulsion dosing tank and
equipment. Manufacture and supply is carried out under the strict
quality control and production procedures in accordance with our
Quality Assurance System.
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CONSTRUCTION METHOD
BITUMIX® is supplied wet-mixed to Optimum Moisture Content (OMC) and at the
designed emulsion dose rate. It can be laid using standard asphalt paving methods or
slightly modified practices used for normal quarry pavement material laying.
Minimum recommended pavement thickness is 50mm and proper compaction and
rolling will provide a hard, durable and smooth surface.
Benefits of using BITUMIX®
The physical properties of BITUMIX allow it to be used in some applications where
traditional asphalt would have been used. The addition of emulsion partially
reactivates the residual bitumen binder that is retained during the manufacturing
process. This combined total binder content greatly improves the mechanical
interlocking and binding of each particle within the pavement.
•
Benefits include:
–
–
–
–
–
–
–
–
Cheaper & cost effective alternative to some asphalt pavements
Can be laid without the use of an asphalt paving machine
Reduced dust generation through traffic and normal wear and tear
Increase in life expectancy over non-bound pavements
Decreases maintenance cycles and associated costs
Re-uses reclaimed asphalt thereby reducing disposal to landfill
Can be laid cold, unlike normal asphalt mixes
Can be stored for several days before use
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APPLICATIONS
• Intermediate structural layer on thick
asphaltic concrete roads
• Grain storage facilities
• Wearing course for light traffic roads
• Road shoulder construction and repair
• Hard stand areas
• Footpaths, fire tracks & walking trails
• Light & medium duty car parks
• Driveways
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DEVELOPMENT OF COLD
BITUMINOUS STABILISED
MATERIAL FROM RECLAIMED
PAVEMENTS
‘BITUMIX 3’
BITUMIX 3 - PRODUCT INFORMATION
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BITUMATE – The Raw Feed Stock
Manufactured to a specification under QA system
BITUMIX 3 - PRODUCT INFORMATION
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Pugmill Manufacture
3% purpose made bitumen emulsion added with or without other binders
BITUMIX 3 - PRODUCT INFORMATION
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Mix Design - Compaction
PUGMILL MIXING
BITUMIX 3 - PRODUCT INFORMATION
COMPACTION
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Mix design - compaction
BITUMIX 3 - PRODUCT INFORMATION
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Mix Design – Resilient Modulus
BITUMIX 3 - PRODUCT INFORMATION
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Mix Design – Rutting and Fatigue
FATIGUE
RUTTING
BITUMIX 3 - PRODUCT INFORMATION
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Sample Design Chart
BITUMIX 3 - PRODUCT INFORMATION
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Field Trials
Design 107 ESA
BITUMIX 3 - PRODUCT INFORMATION
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Costs – Salisbury Park
PAVEMENT
COST PER KM*
DIFFERENCE
280mm BITUMATE 3 + 50mm AC
$318,276
$0
270mm AC
$378,126
$59,850
210 AC + 300 Granular
$505,700
$187,424
*Based on 500m section section trial at Salisbury Industrial Park
BITUMIX 3 - PRODUCT INFORMATION
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Post Construction Evaluations
BITUMIX 3 - PRODUCT INFORMATION
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Other Applications
BITUMIX 3 - PRODUCT INFORMATION
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Other Applications
BITUMIX 3 - PRODUCT INFORMATION
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THANK YOU
BITUMIX 3 - PRODUCT INFORMATION
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