The Hassan / Omann Shingles Recycling Demonstration Project

1

• The Hassan / Omann Shingles Recycling
  Demonstration Project
• A Presentation by Bill Boettner
• At the Dakota County Shingles Recycling Workshop
• On Tuesday, December 4, 2007

2
Whos Who

• Local agency sponsor Town of Hassan
• Original grant funding source Minnesota Local
  Road Research Boards (LRRB)Local Operational
  Research Assistance (OPERA) program
• Shingle recycler, HMA producer and paving
  contractorOmann Brothers
• Second source of grant fundingHennepin County
  Lead By Example Program
• Key partner Mn/DOT

3
Whos Who(continued)

• In-kind field support and technical
  assistanceMn/DOT and Hennepin County DOT
• Third source of grant fundingDakota County
• Additional lab work Professor Mihai
  Marasteanu, U of MN Dept. of Civil Engineering
• Coordination and project management services
  SWMCB via DKA

4
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

5
(No Transcript)
6
(No Transcript)
7
(No Transcript)
8
(No Transcript)
9
(No Transcript)
10
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

11
(No Transcript)
12
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.

13
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

14
(No Transcript)
15
(No Transcript)
16
Lab Tests by Mn/DOT

• Core Density Testing (voids)
• Binder Extraction
• Bending Beam Rheometer (BBR)
• PG Grading test
• Deleterious
• Total Fiber
• ASSHTO Method

17
Lab Tests by U of MN

• Indirect tensile (IDT) strength tests with the
  6-inch gyratory pucks as prepared by Mn/DOT

18
(No Transcript)
19
(No Transcript)
20
(No Transcript)
21
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

22
Media Coverage

• News release issued by Hennepin County
• WCCO radio
• MPR
• Finance Commerce Journal
• Northwest Community TV Channel 12
• Minnesota Local Technical Assistance Program
  (MnLTAP) article in Technology Exchange

23
Other Presentations and Video

• Hassan / Omann Project web page
  onwww.ShingleRecycling.org

24
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)

25
THANKS!

• Bill Boettner, Public Works SupervisorTown of
  Hassan763-525-6220 Boettner_at_townofhassan.com
• www.TownOfHassan.com