NCAT+MnROAD: National Long Term Pavement Preservation Benefit Experiment

Transcription

1 NCAT+MnROAD: National Long Term Pavement Preservation Benefit Experiment

2 NCAT Pavement Test Track Washington Montana Oregon Idaho Wyoming Nevada Utah Colorado California New Mexico Arizona Pre-2015, 2015 North Dakota South Dakota Nebraska Kansas Oklahoma Texas Minnesota Iowa Wisconsin Missouri Arkansas Michigan (upper pennisula) Illinois Mississippi Louisiana Michigan Indiana Kentucky Tennessee Alabama (DOT & DEM) Ohio Georgia New York Pennsylvania West Virginia Florida Vermont New Hampshire Delaware Maryland Virginia North Carolina South Carolina Maine Massachusetts Rhode Island Connecticut New Jersey FHWA Private Sector Sponsors Cargill Deicing Technology Collaborative Aggregates FP 2 Kraton Polymers Modified Asphalt Solutions Oldcastle Materials Polycon Manufacturing Seneca Petroleum Shell Sulfur Solutions Trinidad Lake Asphalt

3 New

4 NCAT Pavement Test Track Help state DOTs implement positive change Promote real innovation for the industry Mix and materials Structural pavement design Pavement preservation.

5 NCAT Pavement Test Track Help state DOTs implement positive change Promote real innovation for the industry Mix and materials Structural pavement design Pavement preservation.

6 Standalone Research Optimization of reclaimed/recycled materials Increasing RAP in polymer surfaces Benefit of rejuvenator in RAP+RAS mix Innovative porous surface mix design Asphalt based high friction alternatives Lower cost thinlay rutting and cracking Mix improvements on longitudinal joint.

7 Thickness Design Optimization Stiff Track subgrade and aggregate base Original 24 Track via 93 AASHTO Design Guide 9 conventional HMA found to be perpetual 5¾ high polymer HMA found to be perpetual Soft subgrade imported to Track for Oklahoma 10 failed (salvaged with high polymer inlay) 14 found to be perpetual (micro milled/inlaid).

8 Thickness Design Optimization Mechanistic Empirical (M E) implementation Incorporation of unconventional materials Ongoing support for empirical (E) designs Layer coefficients for modern DGA, OGFC, CR 0.54 for dense (DGA) & gap (SMA) graded asphalt 0.15 for open graded friction course (OGFC) 0.36 for foamed cold central plant recycle (CCPR).

9 Benefits of Preservation Life extending benefit Condition improving benefit f (pretreatment condition)

10 Benefits of Preservation Life Extending Benefit Condition Improving Benefit

11 Benefits of Preservation

12 Pavement Preservation $ Crack/fog seal Chip/slurry seal Thin overlay Thick overlay Shallow mill/inlay, hot recycle Deep mill/inlay, cold recycle Reclamation

13 Track Thinlay

14 Lee Road 159 Low Traffic Preservation

15 34 Benefits of Preservation

16 34 Benefits of Preservation

17 34 Benefits of Preservation

18 34 Benefits of Preservation

19 Ultra Thin Bonded Wearing Course APAI 12/2/08

20 APAI 12/2/08 DGA Polymer Thinlay

21 APAI 12/2/08 Balanced HMA Mix Designs

22 US 280 High Traffic Preservation

23 High Traffic Thinlays on US mm NMAS dense graded asphalt Standalone test sections at ¾ thickness (virgin vs ABR) Thinlay Cape seals (¾ in combination with chip seals) 1 overlays on cold recycle mixes (CCPR & CIR, F & E) Open graded friction course (OGFC) 1 thinlays Spray paver, UltraTack, PG67 22, UltraFuse, etac ¾ ultra thin bonded wearing course (UTBWC).

24 Balanced Mix Designs

25 Balanced Mix Designs

26 Cantabro Loss (e.g., TEX 245 F)

27 Split Tensile Strengths Peak Load Fracture Energy Balanced Mix Design

28 RAP+RAS Thinlays on Cold Recycle F,E Central Plant In-Place

29 Cold Climate Sections

30 Minnesota Preservation Sections

31 MnROAD Low Traffic Sections

32 MnROAD High Traffic Sections

33 Chip Seal

34 Micro Surface

35 Micro Surface with Crack Sealing

36 Thinlays

37 End of Cycle Track Conference High RAP/RAS balanced mix designs Nationwide pavement preservation Preventing reflective distresses Optimized structural design Implementation March 27-29,

38 Dr. R. Buzz Powell, PE Assistant Director & Test Track Manager 277 Technology Parkway Auburn, AL Phone: (334) Cell: (334) Web: Twitter: