1. CAPA/NCDOT NCAT Pavement Test Track

2. Washington Oregon California Nevada Idaho Montana Wyoming Colorado Utah New Mexico Arizona Texas Oklahoma Kansas Nebraska South Dakota North Dakota Minnesota Wisconsin Illinois Iowa Missouri Arkansas Louisiana Alabama (DOT & DEM) Tennessee Michigan Pennsylvania New York Vermont Georgia Florida Mississippi Kentucky South Carolina North Carolina Maryland Ohio Delaware Indiana West Virginia New Jersey Connecticut Massachusetts Maine Rhode Island Virginia New Hampshire Michigan (upper pennisula) Private Sector Sponsors Cargill Deicing Technology FP2 Kraton Polymers Modified Asphalt Solutions Oldcastle Materials Polycon Manufacturing Seneca Petroleum Shell Sulfur Solutions Trinidad Lake Asphalt FHWA Pre-2012, 2012 Track Research Sponsors

3. 3 Content High Recycle Mixes Lee Road 159 Thinlays

4. APAI – 12/2/08 2012 Track Green Group (GG) study 100% RAP CCPR base mix (+FDR) Surface crack prevention Crack and rut resistant thin overlays Perpetual pavement design HiMA for new/rehab pavements Preservation Group (PG) study. 4

5. APAI – 12/2/08 2012 Track Green Group (GG) study 100% RAP CCPR base mix (+FDR) Surface crack prevention Crack and rut resistant thin overlays Perpetual pavement design HiMA for new/rehab pavements Preservation Group (PG) study. 5

6. Performance Group 2009 High RAP Sections Performance Group Sections – 7” Design 20M ESALs N10 – 50% RAP HMA – PG 67-22 N11 – 50% RAP WMA (Foam) – PG 67-22

7. PG09 High RAP Sections N10 – 50% RAP HMA – PG 67-22 N11 – 50% RAP WMA – PG 67-22

8. APAI – 12/2/08 2012 Track Green Group (GG) study 100% RAP CCPR base mix (+FDR) Surface crack prevention Crack and rut resistant thin overlays Perpetual pavement design HiMA for new/rehab pavements Preservation Group (PG) study. 8

9. Virginia Cold Central Plant Recycling N3 – 6” AC, 5” Foamed CCPR N4 – 4” AC, 5” Foamed CCPR S12 – 6” AC, 5” Foamed CCPR, 8” FDR

10. Full Depth Reclamation

11. N04 - “Thin” Virginia Section

13. CCPR Base and “FDR” Foundation

14. APAI – 12/2/08 2012 Track Green Group (GG) study 100% RAP CCPR base mix (+FDR) Surface crack prevention Crack and rut resistant thin overlays Perpetual pavement design HiMA for new/rehab pavements Preservation Group (PG) study. 14

15. Purpose of Each Layer N5 ControlS5 Higher RAPS6 RAP+RASS13 Recyc Tires Durable, Rut Resistant Surface 20% RAP 20 67-22 DGA 25% RAP 11 67-22 SMA 5% RAS 21 67-22 SMA VIRGIN ARB12 82-22 12 SMA Stiff, Strain Reducing Middle 35% RAP 39 67-22 DGA 50% RAP 41 67-22 DGA 50% AGED 26-24 67-22 DGA 35% RAP 37 82-22 12 DG Fatigue Resistant Base Layer 35% RAP 39 67-22 DGA 35% RAP 34 88-22 DGA 25% RAP 24 76-22+ DGA VIRGIN ARB20 AZ 2012 Green Group (GG) Study Green = Evotherm Q1 Additive, Blue = Astec Green Foamer

16. Purpose of Each Layer N5 ControlS5 Higher RAPS6 RAP+RASS13 Recyc Tires Durable, Rut Resistant Surface 20% RAP 20 67-22 DGA 25% RAP 67-22 SMA 5% RAS 67-22 SMA VIRGIN ARB12 SMA Stiff, Strain Reducing Middle 35% RAP 67-22 DGA 50% RAP 67-22 DGA 50% AGED 67-22 DGA 35% RAP ARB12 DGA Fatigue Resistant Base Layer 35% RAP 67-22 DGA 35% RAP 88-22 DGA 25% RAP 76-22+ DGA VIRGIN ARB20 AZ 2012 Green Group (GG) Study 39%*54%72%

17. 2012 GG Study Pavement Response GTR (380  v, 68F) RAP+RAS (280  v, 68F) Control (260  v, 68F) RAP (200  v, 68F) 17

18. 18 S5 – 4/8/2013

19. 19 S5 – 4/8/2013

20. Evolution of Cracking in Section S5 1.Weak bond between binder and base layers 2.Debonding between binder and base layers 3.“Middle-up” crack initiated at bottom of binder 4.“Middle-up” crack reaches surface of pavement 5.Full depth crack extends to bottom of base 1 2 3 4 5

21. 21 S5 – 4/22/2013

22. 22 S5 – 4/22/2013

23. 23 S5-2 Binder ParameterDesignQC2009 Binder Content (Pb)4.85.04.7 Effective Content (Pbe) 4.14.34.1 Dust-to-Binder Ratio 1.1 1.4

24. 24 Conclusions Higher recycle contents possible Emphasize total binder replacement and aged binder contribution Proper tack are integral to success

25. Questions ?

26. 26 Content High Recycle Mixes Lee Road 159 Thinlays

27. Pavement Preservation on Lee Road 159 27 Asphalt Plant Martin Marietta Quarry Low ADT roadway Low ADT roadway Very high % trucks Very high % trucks 14-year old 5½” pavement 14-year old 5½” pavement Diverse pavement condition Diverse pavement condition Load data provided by quarry and asphalt plant Load data provided by quarry and asphalt plant Lee Road 159

28. 1. Rejuvenating Fog Seal 2. Fibermat 3. Control 4. Control 5. Crack Seal (CS) 6. Single Layer Chip Seal 7. CS + Single Layer Chip Seal 8. Triple Layer Chip Seal 9. Double Layer Chip Seal 10. Microsurfacing + Single Chip (Cape) 11. Microsurfacing 12. CS + Microsurfacing 13. Double Layer Microsurfacing 14. Fibermat + Microsurfacing (Cape) 15. Scrub Seal + Microsurfacing (Cape) 16. Scrub Seal 17. Distress Demo Section 18. Fibermat + HMA thinlay (HMA Cape) 19. HMA Thinlay (PG 67-22) 20. HMA + 100% Foamed Recycle Inlay 21. HMA Thinlay (PG 76-22) 22. Ultra Thin Bonded Wearing Course 23. HMA Thinlay (50% RAP) 24. HMA Thinlay (5% PCRAS) 25. HMA Thinlay (High Polymer) Pavement Preservation on Lee Road 159

29. Sample Treated Section on Lee Road 159 Pretreatment (July, 2012) Outside Wheelpath Driving Towards Quarry Inside Wheelpath Driving Towards Quarry

30. Sample Treated Section on Lee Road 159 August, 2012 Outside Wheelpath Driving Towards Quarry Inside Wheelpath Driving Towards Quarry

31. Sample Treated Section on Lee Road 159 July 2, 2013

32. Sample Treated Section on Lee Road 159 September 12, 2013

33. Sample Treated Section on Lee Road 159 October 29, 2013

34. Sample Treated Section on Lee Road 159 December 17, 2013

35. Sample Treated Section on Lee Road 159 January 31, 2014

36. Sample Treated Section on Lee Road 159 February 26, 2014

37. Sample Treated Section on Lee Road 159 March 25, 2014

38. Sample Treated Section on Lee Road 159 April 22, 2014

39. Sample Treated Section on Lee Road 159 May 27, 2014

40. Sample Treated Section on Lee Road 159 June 19, 2014

41. Sample Treated Section on Lee Road 159 July 24, 2014

42. Sample Treated Section on Lee Road 159 August 12, 2014

43. Sample Treated Section on Lee Road 159 October 7, 2014

49. Pavement Preservation on Lee Road 159

50. Condition Improving Benefit Life Extending Benefit

51. Pavement Preservation on Lee Road 159

53. 53 Pavement Preservation on Lee Road 159

54. 54 Pavement Preservation on Lee Road 159

55. Crack sealing appears to be beneficial in all cases Differences between route/seal and blow/band Scrub seal appears to exhibit crack seal benefit Preservation treatments reduce subgrade moisture Durability of micro surface in accelerated traffic Objective life extending benefit curves developing Interim results presented at 2015 Track Conference. Pavement Preservation on Lee Road 159

56. Questions ?

57. 57 Content High Recycle Mixes Lee Road 159 Thinlays

58. Preservation Group (PG) Experiment 14 sections on the NCAT Pavement Test Track – 7” pavements placed in the summer of 2009 – 2 PFC sections, 12 DGA sections (8 virgin, 4 high RAP) – 16 million ESALs, from 0 to 41 percent WP cracked 25 sections on local count road (Lee Road 159) – ≈5½” thick paved access road to quarry/asphalt plant – 2 control, 23 sections with treatments/combinations – Pretreatment condition varied by WP and direction

59. Thinlays - PG12 Designs centered around 2003 W6 Mix – 4.75mm Limestone Screenings Mix – 40M ESALs L18 – HMA Cape Seal – PG67-22 4.75mm over fiberglass-reinforced chip seal L19 – Virgin Thinlay PG67-22 L20 – Virgin Thinlay PG67-22 over 6” CCPR L21 – Virgin Thinlay PG76-22 L23 – 50% FRAP 54 PG67-22 L24 – 5% PCRAS 19 PG67-22 L25 – Virgin HiMA PG88-22 Test Track S09A – Virgin Thinlay PG76-22

60. Thinlays - PG12 April 2014 – Pre-Treatment Cracking October 2014 – End of 2012 Traffic Cracking (~2.5M ESALs)

61. Pretreatment Condition

62. 62 L17 – Subsection Distress Demo

63. Pretreatment Condition

66. Percent of Lane Area Cracked

67. LR 159 Continued Monitoring Weekly – Inertial Profiler (roughness, texture, rutting) – Visual inspections with notes/pictures

68. LR 159 Continued Monitoring Monthly – Video for crack mapping – Rut depth – Wet ribbed surface friction – Subgrade moisture readings – Falling weight deflectometer (FWD)

69. LR 159 Continued Monitoring Other – Ground penetrating radar (GPR) – Dec, 2012 www.3d- radar.com

70. LR 159 Continued Monitoring Video Crack Mapping

71. 2015 Preservation Continuation/Expansion Continue monitoring ‘12 sections (Track & 159) Capture life extending benefit curve data Partnership with MnROAD for nationwide scope Build new sections on higher ADT roadway.

72. Higher ADT Off-Track Preservation US-280 3 miles to east of Track US-280 3 miles to east of Track 17,000 ADT, ≈9 year old surface 17,000 ADT, ≈9 year old surface Westbound outside lane Westbound outside lane ≥ MP 128.0 to MP 132.6 ≥ MP 128.0 to MP 132.6 Tenth mile sections Tenth mile sections Repeat Lee Road 159 (±) Repeat Lee Road 159 (±) Add CCPR F,E, CIR F,E, HIR, etc. Add CCPR F,E, CIR F,E, HIR, etc. High ABR thin overlays High ABR thin overlays Connection to Cracking Group. Connection to Cracking Group. Lee Road 253 Lee Road 391 NCAT Track 7 ¾” Asphalt Pavement 10 ” Aggregate Base

73. Higher ADT Off-Track Preservation

76. 76 www.pavetrack.com