DAY 1 - Speaker 11 - Andrew Silvestri

7/30/2019 DAY 1 - Speaker 11 - Andrew Silvestri

1/21

Recycling.the re-use of sealed

roads

Andrew Silvestri, Account Manager ResourceCoRoads & Works Conference August 2012


2/21

The South Australian Road Network

2

Roads facts and figures as at February 2007

Road categories

Road length (km)

Sealed Unsealed TotalNational highway 2,751 0 2,751

Urban arterial 920 0 920

Urban local 22 0 22

Rural arterial 8,565 48 8,613

Rural local 117 10,075 10,192

Totals 12,375 10,123 22,498


3/21

INCOMING RAW MATERIALS ASPHALT

ResourceCo has developed state of the art processing facilities that are able tomanufacture a large range of quality, recycled products from various streams.

3

Clean Asphalt

Clean Asphalt (pictured right) consists of clean slab

asphalt and clean profilings. This material should be

contaminant free and contain only minimal amountsof 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.


4/21

BITUMIX

BITUMIX is a nominal 20mm* graded,bitumen stabilised pavement materialmanufactured from BITUMATE with theaddition of a nominated dose rate of highfloat bitumen emulsion and supplementarybinders (1% Cement or Lime).

Source material is reclaimed asphalt removedfrom road pavements and car parks bystripping, cold planning or excavation.

Minimal amounts of base, sub-base or othermaterials may be included in the product.

Under no circumstance is asbestos orasbestos fibre incorporated into the product.

*10 & 14mm can be supplied upon request

4


5/21

PRODUCT DEVELOPMENT

ResourceCo has invested significantly in the development ofBITUMIX. With the assistance of a grant from Zero Waste SA in2005, commissioned the Australian Road Research Board (ARRB)to undertake research.

5

Emulsion Dosage

ResourceCo has exclusive rights to the High Float Medium Set(HFMS) emulsion used in the manufacturing process. Dose ratesare typically in the range of 2 4% and are adjusted dependingon individual project needs and expected end usage.

Manufacture & Quality AssuranceBITMUX is manufactured through our state of the art pugmill

which incorporates the specialist emulsion dosing tank andequipment. Manufacture and supply is carried out under the strictquality control and production procedures in accordance with ourQuality Assurance System.


6/21

CONSTRUCTION METHODBITUMIX is supplied wet-mixed to Optimum Moisture Content (OMC) and at thedesigned emulsion dose rate. It can be laid using standard asphalt paving methods orslightly modified practices used for normal quarry pavement material laying.

Minimum recommended pavement thickness is 50mm and proper compaction androlling 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 wheretraditional asphalt would have been used. The addition of emulsion partiallyreactivates the residual bitumen binder that is retained during the manufacturingprocess. This combined total binder content greatly improves the mechanicalinterlocking 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

6


7/21

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

7


8/21

DEVELOPMENT OF COLDBITUMINOUS STABILISED

MATERIAL FROM RECLAIMED

PAVEMENTSBITUMIX 3

BITUMIX 3 - PRODUCT INFORMATION 8


9/21

BITUMATE The Raw Feed Stock

Manufactured to a specification under QA system



10/21

Pugmill Manufacture

3% purpose made bitumen emulsion added with or without other binders



11/21

Mix Design - Compaction

PUGMILL MIXING COMPACTION



12/21

Mix design - compaction



13/21

Mix Design Resilient Modulus



14/21

Mix Design Rutting and Fatigue


RUTTING

FATIGUE


15/21

Sample Design Chart



16/21

Field Trials

Design 107 ESA



17/21

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


18/21

Post Construction Evaluations



19/21

Other Applications



20/21

Other Applications



21/21

THANK YOU


Documents

DAY 1 - Speaker 11 - Andrew Silvestri