Recycling

1. Concrete

The product is crushed and screened to specific sizes either to conform to contracts already in place or to meet market demands. The crushing and screening of concrete produces 4 products simultaneously.

Following crushing and screening, material is relocated, by loader, to designated stockpile sites.

The crushing and screening process produces 4 products:

• 10mm drainage aggregate
• CR1 20mm minus roadbase
• CD20 20mm drainage aggregate
• 40mm cobble
• CD75 70mm concrete cobbles; and
• CB Packing Fines

Stockpiles of drainage product and 20mm minus roadbase produced from crushed concrete can be tested for conformity to Resource NSW’s Specification for Supply of Recycled Materials for pavements Earthworks & Drainage.

The type and frequency of testing shall be as per Section 5, Table 3 of the specification.
Frequency of testing is summarized below in Table 1.

* Figures in brackets indicate reduced frequency after 6 conforming stockpiles
Frequency of sampling and testing for Class R
Sampling and testing must be carried out by a NATA accredited laboratory.

2. Bricks

The product is screened to specific sizes either to conform to contracts already in place or to meet market demands.

The crushing and screening process produces 3 products:

• BPS Crushed Brick Packing Sand
• BC Crushed Bricks; and
• BDA 10mm & 20mm Decorative Aggregate3. Bricks/Concrete/Tiles/Gravel
• The product is screened to specific sizes either to conform to contracts already in place or to meet market demands.

3. Bricks/Concrete/Tiles/Gravel

The product is screened to specific sizes either to conform to contracts already in place or to meet market demands.

4. Green Waste (Organic)

Green waste is shredded/mulched using a tub grinder into compost material. Three different types of compost are produced:

• GPC Premium Mulch
• GYC Forest Mulch

Stockpiles of Premium compost, Forest compost and Pallet mulch have been tested for beneficial use against the Virgin Excavated Natural Material (VENM) guidelines as defined in NSWEPA Waste Guidelines.

On-site QA field testing shall also be carried out on the compost stockpiles to obtain the following data:

• Temperature
• Moisture Content
• pH
• Maturity

Field testing shall be carried out to Resource NSW Recylced Organics Unit’s specification for Producing Quality Compost 2003 Ed2.

5. Green Timber/Logs

Green timber and logs are screened and mulched to specific sizes, using a tub grinder, either to conform to contracts already in place or to meet market demands.

6. Stumps

Stumps are screened and mulched to specific sizes, using a tub grinder, either to conform to contracts already in place or to meet market demands.

7. Soil

Our recycled soil is a screened soil of maximum particle size of 20mm. The recycled soil is dark in colour with a bulk density of 1.7 ton/m3. The extracted recycled topsoil can be mixed with GPM and sand in the following ratio to produce organic topsoil (OT): 60:20:20.

60% Extracted topsoil

20% Premium mulch (GPM)

20% Sand

Once the Organic Topsoil has been produced and stockpiled, the Yard Manager can take a sample and deliver to a soil testing laboratory for a full soil analysis and bulk density testing. The full soil analysis will indicate the topsoil’s chemical properties including:

• pH - Acid/alkali balance
• EC Electrical conductivity
• Salinity
• Ca/Mg ratio
• Availability of N, P, K, S, Fe, Zn, Cu & Mn.

The analysis will also indicate suitability of the organic topsoil to be used in various landscaping applications.