Reply to Brian Pugh: more information about glass in roads
King County, WA project, using WSDOT specs
http://www.metrokc.gov/procure/green/glass.htm#10
WSDOT spec link to Standard specs (Year 2000):
http://www.wsdot.wa.gov/fasc/EngineeringPublications/Manuals/SS2000English.pdf
Look for:
9-03.21 Recycled Material
9-03.21(1) Reclaimed Glass (Mixed Waste Cullet) Additive to Aggregates
9-03.21(2) Recycled Glass Aggregate
Or here it is:
2000 Standard Specifications - English Page 9-31
9-03.21 Recycled Material
9-03.21(1) Reclaimed Glass (Mixed Waste Cullet) Additive to Aggregates
Reclaimed glass may be blended with the following:
Ballast 9-03.9(1)
Shoulder Ballast 9-03.9(2)
Crushed Surfacing Base Course 9-03.9(3)
Aggregate for Gravel Base 9-03.10
Gravel Backfill for Foundations, Class A 9-03.12(1)A
Gravel Backfill for Foundations, Class B 9-03.12(1)B
Gravel Backfill for Walls 9-03.12(2)
Gravel Backfill for Pipe Zone Bedding 9-03.12(3)
Gravel Backfill for Drains 9-03.12(4)
Backfill for Sand Drains 9-03.13
Sand Drainage Blanket 9-03.13(1)
Borrow 9-03.14
Bedding Material for Rigid Pipe 9-03.15
Bedding Material for Thermoplastic Pipe 9-03.16
Foundation Material Class A and B 9-03.17
Foundation Material Class C 9-03.18
Bank Run Gravel for Trench Backfill 9-03.19
Aggregates containing reclaimed glass shall conform to the requirements of
these Specifications for each item listed above. No aggregate shall contain
more than 15 percent glass. No more than 10 percent of the material retained
on an individual sieve 1?4-inch or larger shall be glass, based upon visual
examination and weight.
9-03.21(2) Recycled Glass Aggregate
Aggregate composed solely of glass may be used as gravel backfill for walls,
pipe bedding, and sand drains; sand drainage blanket; gravel borrow; and
bedding material for flexible pipe.
One hundred percent of the glass shall pass a 3?4-inch square sieve and not
more than 5 percent by weight shall pass a U.S. No. 200 sieve. Sieve
analysis shall be conducted according to AASHTO T 27 on at least a quarterly
basis by the product supplier. All test results shall be kept on file by the
product supplier.
The maximum debris level shall be 10 percent. Debris is defined as any
deleterious material which impacts the performance of the engineered fill
and includes all non-glass constituents of the glass feed stock. The
percentage of debris in cullet shall be quantified using the following
visual method. Approximately 200 grams of processed cullet shall be
placed in a flat pan or plate. The percentage of debris shall be estimated
using AGI Data Sheets 15.1 and 15.2 "Comparison Charts for Estimating
Percentage Composition," by the American Geological Institute, 1982.
Total lead content testing shall be performed quarterly by the product
supplier. Tests shall include a minimum of 5 samples. Sample collection
shall be conducted according to ASTM D 75. The mean of these tests shall not
exceed 80 ppm. Total lead content testing will be conducted according to the
EPA Method 3010/6010. All test results shall be kept on file by the product
supplier.
Eric Nelson (206/263-4278)
Karen Hamilton (206/263-4279)
Environmental Purchasing Program
King County Procurement & Contract Services
821 Second Avenue, Suite 10
MS: EXC-FI-0862
Seattle, WA 98104
http://www.metrokc.gov/procure/green