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Construction Best
Management
Practices For CIR Success
DENNIS MCELROY
FMG DIVISION MANAGER
COLD IN-PLACE RECYCLING AND ASPHALT MILLING
www.FMGCoInc.com
Asphalt Recycling & Reclaiming Association
www.FMGCoInc.com
CIR Is Not Hot Mix Asphalt!
Its not AC and its not AB. It’s really in-between.
Material properties are different and expectations should be
different.
As an industry we all need to have an open mind with these
materials.
We need to utilize the hard work others have done so we can
learn faster and use technology like this in more and more
areas.
PARTNERING
www.FMGCoInc.com
Virginia Interstate 81 – CIR Project
www.FMGCoInc.com
CIR - Erasing Crack History in the
Pavement
www.FMGCoInc.com
Mill-and-Fill Example
www.FMGCoInc.com
Good CIR Candidates
Cracking, Oxidized Pavement, Potholes, etc.
Good CIR Candidates
Requires good drainage and stable
subgrade.
CIR does not solve poor subgrade
conditions!
Good CIR Candidates
Full Depth Reclamation (FDR)
- Solves poor subgrade conditions
Urban Based CIR
Best Management Practices Starts
With Picking The Right Road At The
Right Time
▪ Need to verify
existing pavement
thickness in advance
▪ Understand your traffic
count & subgrade info
▪ Do a pavement design
▪ UC DAVIS PRC is a
great resource!
Equipment Used In the
Industry
Multi Unit Recycler Or “Train”
www.FMGCoInc.com
Multi Unit Recycler Or “Train”
www.FMGCoInc.com
 Windrow of
CIR material to
paving
machine
Single Unit Recycler
www.FMGCoInc.com
 Rear conveyor
delivery of CIR
material to paving
machine
Single Unit Recycler
www.FMGCoInc.com
CIR Single Unit Recycler Material
Processing
www.FMGCoInc.com
Two Main Binder Types
Foamed Asphalt
www.FMGCoInc.com
Emulsions
www.FMGCoInc.com
IMPORTANT
Both binder types have similar long term performance
characteristics.
Each with their own specifications and specific test
methods.
DO NOT BLEND THE SPECS TOGETHER!
Caltrans NSSP’s (approved April 2018)
Section 30-5 CIR using Emulsified Asphalt
Section 30-6 CIR using Foamed Asphalt
www.FMGCoInc.com
Where Do I Get The Proper
Specification?
Caltrans CIR homepage online was last updated:
06/15/2011
Talk to the CIR contractors or agency’s that have
already completed a project.
- Most of the contractors who specialize in CIR will
provide lunch and learn opportunities or will be
willing to share lessons learned.
- www.RoadResource.org is also a great resource.
www.FMGCoInc.com
Critical! Before Starting A Project!
www.FMGCoInc.com
JITT Training – Just in time training
This can be after samples have been pulled and a mix design has
been developed.
1. JITT training needs to be done before the work within the
pavement section begins.
2. Have the conversations that you don’t want to have.
3. Staging areas, Traffic handling, mix design, contingency plan,
on site contacts, who is responsible for what, concerns from
all sides, etc.
4. This meeting, with all parties involved, will set the tone and
expectations of the project.
1. Lower Utilities
- Min. 3” below CIR depth
2. Do Your Milling First.
Key cut and conforms need to be done before CIR if they are
within the area to be recycled.
IF YOU DON’T HAVE TO, DON’T MILL THE CIR SURFACE.
Profile And Cross Slope Adjustments
Typical Cross Section Detail
www.FMGCoInc.com
Typical Cross Section Example
www.FMGCoInc.com
Fog Seal Application
www.FMGCoInc.com
Close-Up of Fog Seal
www.FMGCoInc.com
Fog Seal Curing
www.FMGCoInc.com
Close-Up of RAP Mat
www.FMGCoInc.com
Cold Material – Minimal cross traffic, emergency vehicles and driveway
access is ok.
www.FMGCoInc.com
Final CIR Surface Before The Overlay
Time between completion of
CIR and final surfacing:
Foamed Asphalt
Minimum: 2 to 3 days of
curing
Maximum: 15 days of
exposure to traffic
Emulsions
Minimum: Moisture 2% or
less.
Supplemental Compaction
Maximum: 15 days of
exposure to traffic
www.FMGCoInc.com
Final CIR Surface Before The Overlay
What is Supplemental Compaction?
◦ Re-Rolling the entire CIR Surface
prior to smoothness testing or
final surfacing.
◦ After moisture loss due to curing
there are more air voids in the
mixture. Re-rolling the surface
takes out those voids.
Foamed Asphalt doesn’t require
supplemental compaction.
www.FMGCoInc.com
Need to apply tack coat before the HMA
overlay is placed.
◦ A fog seal was applied on the final CIR
surface?
Overlay Install, Tack Coat applied
in front of paver & Final CIR Surface
www.FMGCoInc.com
Cul De Sac Example
www.FMGCoInc.com
Cul De Sac Example
www.FMGCoInc.com
Cul De Sacs Contd.
Paved exterior of cul de sac
CIR Ties into new paved exterior of the cul de sac
And directly to the lip of gutter.
AC Paving was left 2” low along lip of gutter. NO milling required later.
www.FMGCoInc.com
Point Reyes Petaluma Road – Marin
County
Shoulder widening
www.FMGCoInc.com
Shoulder Widening with CIR
www.FMGCoInc.com
Contact Info
Dennis McElroy
FMG Division Manager
Dmcelroy@Graniterock.com
Cell:408-639-8063
www.FMGCoInc.com

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Construction Best Management Practices for CIR

  • 1. Construction Best Management Practices For CIR Success DENNIS MCELROY FMG DIVISION MANAGER COLD IN-PLACE RECYCLING AND ASPHALT MILLING www.FMGCoInc.com
  • 2. Asphalt Recycling & Reclaiming Association www.FMGCoInc.com
  • 3. CIR Is Not Hot Mix Asphalt! Its not AC and its not AB. It’s really in-between. Material properties are different and expectations should be different. As an industry we all need to have an open mind with these materials. We need to utilize the hard work others have done so we can learn faster and use technology like this in more and more areas. PARTNERING www.FMGCoInc.com
  • 4. Virginia Interstate 81 – CIR Project www.FMGCoInc.com
  • 5. CIR - Erasing Crack History in the Pavement www.FMGCoInc.com
  • 7. Good CIR Candidates Cracking, Oxidized Pavement, Potholes, etc.
  • 9. Requires good drainage and stable subgrade. CIR does not solve poor subgrade conditions! Good CIR Candidates
  • 10. Full Depth Reclamation (FDR) - Solves poor subgrade conditions
  • 12. Best Management Practices Starts With Picking The Right Road At The Right Time ▪ Need to verify existing pavement thickness in advance ▪ Understand your traffic count & subgrade info ▪ Do a pavement design ▪ UC DAVIS PRC is a great resource!
  • 13. Equipment Used In the Industry
  • 14. Multi Unit Recycler Or “Train” www.FMGCoInc.com
  • 15. Multi Unit Recycler Or “Train” www.FMGCoInc.com
  • 16.  Windrow of CIR material to paving machine Single Unit Recycler www.FMGCoInc.com
  • 17.  Rear conveyor delivery of CIR material to paving machine Single Unit Recycler www.FMGCoInc.com
  • 18. CIR Single Unit Recycler Material Processing www.FMGCoInc.com
  • 22. IMPORTANT Both binder types have similar long term performance characteristics. Each with their own specifications and specific test methods. DO NOT BLEND THE SPECS TOGETHER! Caltrans NSSP’s (approved April 2018) Section 30-5 CIR using Emulsified Asphalt Section 30-6 CIR using Foamed Asphalt www.FMGCoInc.com
  • 23. Where Do I Get The Proper Specification? Caltrans CIR homepage online was last updated: 06/15/2011 Talk to the CIR contractors or agency’s that have already completed a project. - Most of the contractors who specialize in CIR will provide lunch and learn opportunities or will be willing to share lessons learned. - www.RoadResource.org is also a great resource. www.FMGCoInc.com
  • 24. Critical! Before Starting A Project! www.FMGCoInc.com JITT Training – Just in time training This can be after samples have been pulled and a mix design has been developed. 1. JITT training needs to be done before the work within the pavement section begins. 2. Have the conversations that you don’t want to have. 3. Staging areas, Traffic handling, mix design, contingency plan, on site contacts, who is responsible for what, concerns from all sides, etc. 4. This meeting, with all parties involved, will set the tone and expectations of the project.
  • 25. 1. Lower Utilities - Min. 3” below CIR depth
  • 26. 2. Do Your Milling First. Key cut and conforms need to be done before CIR if they are within the area to be recycled. IF YOU DON’T HAVE TO, DON’T MILL THE CIR SURFACE.
  • 27. Profile And Cross Slope Adjustments
  • 28. Typical Cross Section Detail www.FMGCoInc.com
  • 29. Typical Cross Section Example www.FMGCoInc.com
  • 31. Close-Up of Fog Seal www.FMGCoInc.com
  • 33. Close-Up of RAP Mat www.FMGCoInc.com
  • 34. Cold Material – Minimal cross traffic, emergency vehicles and driveway access is ok. www.FMGCoInc.com
  • 35. Final CIR Surface Before The Overlay Time between completion of CIR and final surfacing: Foamed Asphalt Minimum: 2 to 3 days of curing Maximum: 15 days of exposure to traffic Emulsions Minimum: Moisture 2% or less. Supplemental Compaction Maximum: 15 days of exposure to traffic www.FMGCoInc.com
  • 36. Final CIR Surface Before The Overlay What is Supplemental Compaction? ◦ Re-Rolling the entire CIR Surface prior to smoothness testing or final surfacing. ◦ After moisture loss due to curing there are more air voids in the mixture. Re-rolling the surface takes out those voids. Foamed Asphalt doesn’t require supplemental compaction. www.FMGCoInc.com
  • 37. Need to apply tack coat before the HMA overlay is placed. ◦ A fog seal was applied on the final CIR surface? Overlay Install, Tack Coat applied in front of paver & Final CIR Surface www.FMGCoInc.com
  • 38. Cul De Sac Example www.FMGCoInc.com
  • 39. Cul De Sac Example www.FMGCoInc.com
  • 40. Cul De Sacs Contd. Paved exterior of cul de sac CIR Ties into new paved exterior of the cul de sac And directly to the lip of gutter. AC Paving was left 2” low along lip of gutter. NO milling required later. www.FMGCoInc.com
  • 41. Point Reyes Petaluma Road – Marin County Shoulder widening www.FMGCoInc.com
  • 42. Shoulder Widening with CIR www.FMGCoInc.com
  • 43. Contact Info Dennis McElroy FMG Division Manager Dmcelroy@Graniterock.com Cell:408-639-8063 www.FMGCoInc.com