1. NRRA FLEX TEAM MIX REJUVENATOR TAP MEETING
Michael Vrtis, Ph.D. | Research Project Engineer
6/17/2019
mndot.gov

2. Agenda Synthesis Field Sections Status / Schedule Materials Costs
Research Contract
Actions items
RED= NOTES TAKEN DURING MEETING
7/3/2019
mndot.gov

3. Synthesis
This synthesis will summarize the experiences that each NRRA member State has had regarding asphalt mixture rejuvenators. It is intended to share implementation projects to facilitate transfer of knowledge and provide guidance to NRRA Mix Rejuvenator Test Sections (Phase II)”
Introduce Sheue and Tom Wood from WSB
What information would be useful for producers? What information would be useful from producers?
Review questions at end of call if time permits- NO TIME
GRANT FROM SUPERIOR BOWEN SHARED PROJECTS
SURVEY WILL BE SENT TO ALL TAP MEMBERS
WSB WILL CONTACT PRODUCER PARTICIPANTS INDIVIDUALLY
7/3/2019
mndot.gov

4. Meeting Participants Brian Hill Dan Oesch Bob Kluttz Hassan Tabatabaee
MnDOT
Michael Vrtis
Ben Worel
Jerry Geib
WSB
Sheue Lee
Tom Wood
NCAT
Nam Tran
Nathan Moore
Randy West
Brian Hill
Dan Oesch
Bob Kluttz
Hassan Tabatabaee
Grant Wollenhaupt
Jason Bausano
Steve Bly
Gerry Reinke
Raghubar Shrestha
7/3/2019
mndot.gov

5. Synthesis State member to send survey to??? Michigan- Kevin Kennedy
ND- Amy
Iowa – Chris
7/3/2019
mndot.gov

6. Field Sections Trunk Highway 6 13.4 miles Emily to Outing, MN
2” mill (4.5”-6.0” existing HMA)
2” lift – HMA 12.5 max
1.5” lift - HMA 9.5 max
High RAP / Rejuvenators in this lift
7/3/2019
mndot.gov

7. Status / Schedule Construction- mid to end of August
High RAP Mix Design submitted 2 weeks prior to construction
Contractor will try to get it to us earlier
Week of July 15- Contractor should have aggregate stockpiles
Samples can be obtained in July and sent to each producer for dosage testing. Mix will have to be built from components shipped prior to receiving final mix design from contractor.
7/3/2019
mndot.gov

8. Materials - RAP RAP at MnDOT
75 Cores taken on 6/13/19 throughout project
≈PG 75.3 – 24.8 (PG 70 – 22)
7/3/2019
mndot.gov

9. Materials - Aggregate Contractor using new quarry
Equipment into quarry week of 7/8
Agg stockpiles ready week of 7/15
Can be obtained and shipped week of 7/22
Received by end of July (i.e., ready for dosage testing once mix design is obtained)
500 lbs of “approximate aggregate” at MnDOT now
7/3/2019
mndot.gov

10. Materials – Virgin Binder
MnDOT obtained 6/26/19. Received 5 1-gallon cans instead of 5 5-gallon cans
Submitted for continuous PG on 6/27/19
Can request more from refinery
7/3/2019
mndot.gov

11. Materials – Rejuvenator / Recycling Agent
Rejuvenator will be supplied by the producer to the contractor for in-line blending at the HMA plant
Ship to contractor beginning of August. More details later
Dosage
State agencies members will be voting on:
A- Dosage based on mfg. recommendation only
B- Dosage to reach target (PG)
What is target? (xx-34)?
Each producer will be responsible for providing the required dosage for their product to be used in the high RAP mix design. Materials will be provided for testing
Dosage is determined by producer. The project is not dictating a target PG grade?
7/3/2019
mndot.gov

12. LTPP Bind Target PG xx-34 even though MnDOT would use 58-28
For this job
7/3/2019
mndot.gov

13. Costs
Additional cost to contractor to include field sections = $65,000 (construction delay + pump + mix design)
Paid directly to Anderson Brothers
7 Confirmed participants = $9,285 per participant
4 unconfirmed participants = $5,910 per participant
STATE member vote needed for this
Is this project going to allow terminally blended / Polymer Binder sections?
Tanker will be needed
Contractor open to switching tankers for polymer binders
7/3/2019
mndot.gov

14. Research Contract
Construction summary and experiment design – MnDOT/NRRA
≈$100,000 available for Long-term Evaluation and Reporting
Performance testing? Aging?
Round Robin similar to NRRA overlays?
Annual binder testing to determine stability over time
MnDOT will monitor IRI and cracking
Likely need RFP
7/3/2019
mndot.gov

15. Action Items MnDOT Rejuvenator producers All TAP Members
Compile list of material needed and addresses for dosage testing
Change order to contract
Send out items to state agency members to vote
Check TH 6 construction history for original binder type
Rejuvenator producers
Confirm participation
Submit request for material needed for dosage
All TAP Members
Complete survey!!!
Ideas for project RFP
7/3/2019
mndot.gov

16. Other items
High RAP mix design needs to use some rejuvenator – Gerry Reinke
MnDOT will look at grouping rejuvenators on base/source type
Blindly select rejuvenator to be used in design
Rejuvenator cost information and economic analysis
Needs to be further discussed if cost info will be shared and compared for these sections
Grant W. and Gerry R. stated that costs/economics should be reported
7/3/2019
mndot.gov

17. Thank you again! Michael Vrtis, Ph.D. Michael.Vrtis@state.mn.us
7/3/2019
mndot.gov