Sunday, 22 December 2024

Wisconsin

The Wisconsin Department of Natural Resources is drafting a new guide for asphalt shingle recyclers.  Asbestos testing frequency requirements for recycling are being updated. Shingle recyclers are required to be go through an approval process before delivering to asphalt mix plants.

The Wisconsin State Department of Transportation has set specifications for use of recycled asphalt shingles (RAS) in the state’s mixes. These specifications permit manufacturer RAS use and not post manufacturer.

 
 

Wisconsin Environmental Management Division

Cassie Lamensky
Casey.lamensky@wisconsin.gov
(608) 267 - 7574
 
Wisconsin Department of Natural Resources
Division of Environmental Management
Waste and Materials Management 
PO Box 7921 
Madison, WI 53707-7921
 
 

Department of Transportation

HMA Mix Design Specialist
Jeffery R. Anderson
(608) 246 - 5456
jeffrey.anderson@dot.wo.gov
 
Wisconsin Department of Transportation
Bureau of Technical Services
3502 Kinsman Blvd
Madison, WI 53704
 
Wisconsin Department of Transportation (WisDOT), together with the Wisconsin Asphalt Pavement Association and member contractors, conducted a series of field and lab tests in 2008 leading to the adoption of an additional special provisional (ASP) modification to the standard specification that allows the use of RAS in HMA. Effective in January 2009, this new specification is a part of the WisDOT’s Construction Materials Manual (CMM). The RAS specification is included in Section 460 – Hot Mix Asphalt Pavement.

This new ASP-6 specification provides for the use of RAS in combination with various grades of RAP in HMA up to specified limits before a change in the virgin binder grade is required. Subsection 460.2.5 on “Recycled Asphaltic Materials” states:

1. The contractor may use recycled asphaltic materials from FRAP, RAP, and RAS in HMA mixtures. Stockpile recycled materials separately from virgin materials and list each as individual JMF components.
2. Control recycled materials used in HMA by evaluating the percent binder replacement, the ratio of recovered binder to the total binder. Conform to the following:

 And Subsection 460.2.5 on “Recovered Asphaltic Binders” states:

1. Establish the percent of recovered asphaltic binder from FRAP, RAP, and RAS for the mixture design according to AASHTO T 164 using the appropriate dust correction procedure. If production test results indicate a change in the percent of recovered asphaltic binder, the contractor or the engineer may request a change in the design recovered asphaltic binder. Provide at least 2 recent extractions from the contractor's mixture design laboratory supporting that change.
2. The contractor may replace virgin binder with recovered binder up to the maximum percentage allowed under 460.2.5 without changing the asphaltic binder grade. If using more than the maximum allowed under 460.2.5, furnish test results indicating that the resultant binder meets the grade the contract originally specified.”

Effect of Recovered Binders from Recycled Shingles and Increased RAP Percentages on Resultant Binder PG

 

 

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Last Updated: ( Saturday, 09 June 2018 )