RECYCLED ASPHALT
SHINGLES IN
HOT MIX ASPHALT
CASE STUDIES OF NEW STATE
SPECIFICATIONS AND IMPLEMENTATION
Bill Rosener
Executive Vice President
Asphalt Paving Association of Iowa
Introduction
 New guy on the job last year
 Credit to those that deserve it:
Scott Schram, IDOT Bituminous Engineer
Dr. Chris Williams, ISU Associate
Professor
 Waste Commission of Scott County
 APAI Contractors
Waste Commission of Scott Co.
Shingle Grinding Operation
RAS History in Iowa
APAI Role
 Facilitator between contractors and IDOT
 Three Open House Demonstrations in 2009
 Featured at Greater Iowa Asphalt Conference
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500 Attendees
Featured at six Regional Conference Meetings
200 Attendees
Participate in this excellent webinar
Three RAS Workshops in 2010 across Iowa
Three Open House Demos planned for 2010
Recycled Shingles are Good for
Asphalt
 High Asphalt Cement Content 30% by weight
 High grade aggregate
 Fibers
 Lime Dust (natural anti-strip)
McCarthy / Scott Co Waste Demo
McCarthy / Scott Co Waste Demo
McCarthy / Scott Co Waste Demo
Des Moines Asphalt / Polk Co
RAS and WMA Demo
Des Moines Asphalt / Polk Co
RAS and WMA Demo
Des Moines Asphalt / Polk Co
RAS and WMA Demo
Determann Asphalt / IDOT
Demo
Determann Asphalt / IDOT
Demo
Determann Asphalt / IDOT
Demo
Determann Asphalt / IDOT
Demo
Marketplace Determines Feasibility
 Contractors see potential for cost savings
 Contractors see “green” benefits
 Contractors see risk (DNR / OSHA)
 IDOT sees benefits in lower prices and green
initiative
 IDOT places specification burden on RAS
suppliers thus allowing contractors to try using
RAS before becoming recyclers themselves
Conclusions
 APAI’s role is facilitator between
contractors and public agencies including
IDOT, county, city and consulting
engineers
 IDOT is the “rule maker” for all of Iowa
 RAS is beneficial to asphalt
 The success of RAS will ultimately
depend on the marketplace and
regulatory agencies
Thank yous
 Scott Schram, IDOT Bituminous Engineer
 Dr. Chris Williams, ISU Associate Professor
 Waste Commission of Scott County
 APAI Contractors
 CMRA
 Dan Krivit, Foth Engineering
Questions?
www.APAI.net