The Hassan / Omann Shingles Recycling Demonstration Project

A Presentation by Bill BoettnerAt the Dakota County Shingles Recycling Workshop

On Tuesday, December 4, 2007

Who’s Who• Local agency sponsor: Town of Hassan• Original grant funding source: Minnesota Local Road

Research Board’s (LRRB)Local Operational Research Assistance (OPERA) program

• Shingle recycler, HMA producer and paving contractor:Omann Brothers

• Second source of grant funding:Hennepin County Lead By Example Program

• Key partner: Mn/DOT

Who’s Who(continued)

• In-kind field support and technical assistance:Mn/DOT and Hennepin County DOT

• Third source of grant funding:Dakota County

• Additional lab work: Professor Mihai Marasteanu, U of MN Dept. of Civil Engineering

• Coordination and project management services: SWMCB via DKA

Project Objectives

• Test tear-off RAS in wear course• Compare tear-off RAS vs. manufacturers’

RAS vs. virgin only HMA• No RAP in any test mix• Continue analysis of cost savings

potential

Shingles Grinding by Omann

• ½-inch minus• G.L. Roofing Company provided 12 tons of

clean, certified tear-off shingles• Written certification forms used to document

compliance with state and federal rules• Nails removed by a series of magnets

Shingles Grinding by Omann(continued)

• Three stage grinding process• Nails removed by a series of magnets and a

metal detector• July 18, 2006 observation by Mn/DOT and

Hennepin County• RAS stockpiled for a month prior to use.

“Fluffed” immediately prior to use in HMA plant.

Omann Paving

• August 22, 2006, Omann Brothers first graded and then compacted the gravel road in preparation for paving

• August 23, 2006, the base course of hot-mix asphalt was applied

• August 25 , 2006 the wear course was applied

Observations of Pavement Performance To-Date

• Mn/DOT has conducted two field surveys– March 2007– September 17, 2007

• Cracking– No observed pre-mature cracking

• Rutting– Using a FACE Dipstick®– Slight and irregular rutting with no significant

difference between mix types

Other Presentations and Video *

Hassan / Omann Project web page onwww.ShingleRecycling.org

For More Information• www.ShingleRecycling.org• Eddie Johnson, Mn/DOT: Unpublished report on

Rutting “Dipstick” Survey (October 2007)• Jim McGraw, Mn/DOT: Power Point presentation

to July 11, 2007 project close-out meeting• Mihai Marasteanu, U of MN: Power Point

presentation to July 11, 2007 project close-out meeting

• Debra Haugen, DKA: Final Report to LRRB (May 31, 2007)

THANKS!

Bill Boettner, Public Works SupervisorTown of Hassan763-525-6220 Boettner@townofhassan.comwww.TownOfHassan.com