1. Highly Modified Binder Yield Performance Gains for I-40 Project
17th Annual Conference & Workshop
Grand Hyatt
Seattle, Washington
February 9-11, 2016
Kenneth Ray Hobson, P.E.

2. Outline NCAT 2009 Cycle N8 Caddo County I-40
3 Year Fatigue Research at OU
LTPP SPS-10
Wagoner County GTR
Conclusions

3. OK N9-N8 Sections

4. NCAT 2009 Cycle N8
OK Sections

5. NCAT 2009 Cycle N8 2006 Cycle Perpetual 10″ thick Experiment
Failed after 10 MESALs
2009 Cycle
Milled and Replaced  5.0″
Two Fabric Types
Delay Bottom-up Fatigue

6. NCAT 2009 Cycle N8

7. NCAT 2009 Cycle N8 - Failure

8. NCAT 2009 Cycle N8 After 3.5 MESALs Mill and Replace (PG 76E-28)
1.25″ — 3/8″ [9.5 mm] NMAS
3.25″ — 3/4″ [19 mm] NMAS
1.25 ″ — 3/8″ [9.5 mm] NMAS
RIL (+0.2% Pb)

9. NCAT 2009 Cycle N8
Lasted 16.2 MESALs

10. Caddo County I-40 MP

11. Caddo County I-40 – 10/12 Mill 5″ & Replace (PG 76E-28)
3/4″ — OGFSC (PG OK)
1.5″ — 3/8″ [9.5 mm] NMAS S5
2.5″ — 3/4″ [19 mm] NMAS S3
RIL (+0.2% Pb)

12. Caddo County I-40 – TFHRC

13. Caddo County I-40 – TFHRC
Damage

14. Caddo County I-40 – 1/21/16

15. 3 Year Fatigue Research at OU
Select Best Fatigue Test for ODOT
Specify Fatigue Test Limits
Draft Fatigue Test Method if Needed

16. 3 Year Fatigue Research at OU
Purchase and Install Fatigue Test Equipment at ODOT
Purchase and Install AMPT at ODOT
Train ODOT Personnel

17. 3 Year Fatigue Research at OU
Chose SCB-LTRC Test Method
Delay Final for LTPP SPS-10 Research

18. LTPP SPS-10

19. LTPP SPS-10

20. LTPP SPS-10 – SCB-LTRC

21. LTPP SPS-10

22. LTPP SPS-10
Min.

23. LTPP SPS-10

24. Wagoner County GTR

25. Wagoner County GTR

26. Wagoner County GTR ODEQ Sponsored Research OU GTR Literature Review
ODOT FWD Tests
ODOT GTR Mix Designs
OU SCB-LTRC Tests

27. Conclusions
Based on N8 and Caddo County Experience and NCAT SN of 0.54
Design Thickness -20%

28. Conclusions – SN 0.44=7″ HMA

29. Conclusions – SN 0.54=5.5″ HMA

30. Conclusions ODOT Adopt Fatigue Test 2018
Dynamic Modulus
LTPP SPS-10 Fatigue Tests Complete Late 2016
Wagoner County GTR
Construct Spring 2016
Fatigue Performance is Key

31. Questions?