1. MnROAD/NCAT Partnership
Safer, Smarter, Sustainable Pavements through Innovative Research
Allen Gallistel (presentation from Jerry Geib)
ETF Meeting - November 29, 2017

2. National Pavement Preservation Study, 3-$120k
TPF-5(267)
National Pavement Preservation Study, 3-$120k
Development of a National Cracking Test, 3-$210k
Partnership exists “within” the pooled fund.
MnDOT is a subcontractor to Auburn Univ (NCAT is a non profit arm of Auburn).
Test track is funded by a pooled fund, with AL DOT as the lead.
Running 6-7 businesses out of the same checking account.

3. Outline MN Weather MnDOT site Ride Data US 169 CSAH 8
MnROAD – low volume OGF

4. Weather facts are not Boasting or complaining. Just our story.
Our challenge, Design for loads, Design for the environment
(northern half of the state) Colder than 96% of the world’s population.
Statewide temps Jan. 2, :48am
Superpave -34 binders work!!
-34C = -29.2F
Duluth this winter 74 days below ZERO. A nice run of 23 consecutive days below zero.
XX days below zero in the winter of
The worst winter in the Twin Cities since
Note International Falls -41

5. Low Temperature Cracking
Development of SuperPave
Original MnROAD Test Sections (PG 64-22, PG 58-28)
1999 MnROAD Test Cells (PG 58-28, PG , PG 58-40)
HMA examples for polymer binders.
Pre Superpave, MnROAD thermal cracks were about every 25 feet. 500’ / 20 cracks = 25’ crack spacing.

6. National Pavement Preservation Study
Mille Lacs County
Rum River Bridge
RP 189.9
US-169
High Volume Road
4 mile section
Pease
CSAH 8
Low Volume Road
2.5 mile section
MnROAD
RP 185.3

7. Northern Low Traffic Preservation CSAH-8
High Traffic
Preservation
on US-169
Current experiment design of northern MnDOT sections
Next 10 slides, I will explain 7

8. National Pavement Preservation Study
Goals
National Study (Climatic zones)
Provide consistently collected data / analysis
Quantify the life extending benefits
Improve and/or extend the pavement life
Cost effectiveness
LIFE EXTENDING BENEFITS
THIS IS MY MOST IMPORTANT ASPECT OF THE STUDY
THIS IS WHY THE HARD WORK

9. PreTreatment Condition US-169 Northbound Lanes
Smoother than CSAH 8
Surface cracking

10. Did not effect ride as much as maybe thought it would.

12. Two mills used. The three sections with better ride improvement were done full lane width. The other 3 sections used an 8’ mill.

13. PreTreatment Condition CSAH-8 East and Westbound Lanes
Very good tight HMA surface.
Transverse cupped cracks.

15. Northern Low Traffic Preservation CSAH-8
EXPLAIN RIDE NUMBERS
Single, double, triple.
With fibers.
With a rejuvenating emulsion.
Under microsurfacing.
Under Thinlay.

16. Northern
Low Traffic
Preservation
CSAH-8

17. Nov 30, CSAH 8 Cell 18

18. Open Graded Friction Coarse“OGFC”
On MnROAD low volume loop.
OGFC/PCC conventional tack OGFC/PCC ultrafuse tack
OGFC/HMA ultrafuse tack OGFC/HMA conventional tack
August 2016 – Hardrives Contractor 18

19. New
NEW LOGO

20. Contractors and Material Suppliers
Thank You
Contractors and Material Suppliers
Vance Brothers
East Alabama
Paving
Brock White
Crafco
Colas
Etnyre
Hardrives
Roadtec
Astech Corp
Martin Marietta Materials
Collaborative Aggregates
Asphalt Materials

21. Thank You – Allen Gallistel For more Information -Jerry Geib
For more Information -Jerry Geib