Pooled Fund Partners

Institute for Transportation

Institute for Transportation
2711 South Loop Dr, Suite 4700
Ames, IA 50010-8664

Phone: 515-294-8103
Fax: 515-294-0467
E-mail: InTrans Communications

Copyright © 2018, Iowa State University. All rights reserved.



The Indiana Department of Transportation (InDOT) joined TPF-5(213) as a state partner in 2009. InDOT came to the study with experience in using post-manufactured recycled asphalt shingles (RAS). In 2006, InDOT developed a specification allowing for up to 5.0 percent post-manufactured recycled asphalt shingles (RAS) only. In early 2009, prior to the initial start-up date for TPF-5(213), InDOT worked with Iowa State University (ISU) to develop a draft post- consumer RAS specification. The draft specification allowed up to 5 percent post-consumer RAS with 100 percent passing the 1/2-inch sieve. Two RAS demonstration projects were identified and scheduled for the 2009 construction season. The demonstration project selected as part of the TPF-5(213) research, was an overlay project on Route 6 East of the City of Nappanee located in Elkhart County in North Central Indiana. The goal of the project was to look at the performance of RAS only in hot-mix asphalt (HMA) and warm-mix asphalt (WMA) applications. The project included two test sections: one section with 3.0 percent post-consumer RAS in HMA and a second section with 3.0 percent post- consumer RAS in WMA. The project also included a control section using 15 percent recycled asphalt pavement (RAP) only in HMA.

In 2010, InDOT released revisions to Special Provision 400-R-553 HMA Provisions to include post-consumer RAS. Recycled asphalt material (RAP, RAS, or a combination of RAS and RAP) binder replacement percentages vary according to mix type and placement and range from 15 to 40 percent; the deleterious content for RAS is limited to percentages stated in AASHTO MP15.

Indiana DOT Partners:

Ron Walker, P.E.
Office of Materials Management
Phone: (317) 610-7251

Mike Prather, P.E.
Operations/Materials Management
Phone: (317) 610-7251


INDOT Tech Brief

The technical brief summarizes the results of Indiana DOT's demonstration project completed for TPF-5(213).  The final report can be found under the Project Reports Section.