Recycled Asphalt Shingles in Hot Mix Asphalt Case Studies of New State Specifications and Implementation Bill Rosener Executive Vice President Asphalt.

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Presentation transcript:

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 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