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Recycled Product Experience:

Recycled Concrete Aggregate as Crushed Stone Surfacing
Houghton Custodial Landfill

Product and recycled content Recycled concrete aggregate
100% recycled
Application Crushed stone surfacing
Replaces natural (virgin)aggregate
Location/Date Houghton Landfill (Kirkland, WA)
Summer, 1994
Project manager/user John Komorita, Senior Engineer
Solid Waste Division, (206)296-4426
Architect/Engineer Associated Earth Sciences
Erick Miller, (206)780-9370
General Contractor Wilder Environmental
Steve Perrin, (206)637-2995
Background, history Project staff considered it a viable alternative to natural aggregate and a cost effective material
Performance Comparable compaction and handling
Source of material Cadman Gravel, (206)622-2065
Quantity/size 1900 tons of 1-1/2" minus
Cost $7.05 per ton delivered, compared to $10.50 delivered-natural aggregate
Cost savings or increase This project saved over $6500
Installation, costs/savings Comparable
Source of extra funds None; material was less expensive
Would you buy this product again? Yes, for certain applications.
Why or why not? Suitable material for this application

Specifications:

Recycled Concrete Aggregate - Solid Waste Division/Houghton Landfill

2.05 CRUSHED-STONE PAVEMENT
2-05.2(2) Aggregate
Aggregate shall consist of recycled concrete rubble in accordance with Section 9-03.11 of the WSDOT 1994 Standard Specifications for Road, Bridge and Municipal construction.
The aggregate shall meet the following test requirements:
Los Angeles Wear, 500 revolution, 35%
maximum degradation factor 25% minimum
Aggregate shall meet the following gradation:
Sieve Size Percent Passing by Weight
1-1/2" square 100
3/4" square 55-90
No. 4 25-60
No. 50 5-25
No. 200 3-12
 
The gradation shall be determined in accordance with ASTM D-422 testing procedures. The portion passing the No. 40 sieve shall be non-plastic.
The moisture content of the aggregate immediately prior to placement shall be within 2% of the optimum moisture content as determined by ASTM D-1557 test method.

For more information about this product:

Recycled Concrete Aggregate
Recycled Concrete Aggregate as Crushed Stone Surfacing at the Puyallup/Kit Corner Custodial Landfill

Glass aggregate was also used as pipe bedding on this project:

Recycled Glass Aggregate
Recycled Glass Aggregate as Pipe Bedding at the Houghton Custodial Landfill
Recycled Glass Aggregate as Pipe Bedding at the Puyallup/Kit Corner Custodial Landfill

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Updated: June 25, 1998

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