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TEST TRACK RECONSTRUCTION: ISSUES TO CONSIDER

TEST TRACK RECONSTRUCTION: ISSUES TO CONSIDER. David Jones. HVSIA Annual Meeting, San Jose, Costa Rica August 21-23, 2013. Introduction Reuse the full structure Reuse part of the structure Recycle Reconstruct Conclusions. Key Issues. Key Issues. Reuse the full test track structure

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TEST TRACK RECONSTRUCTION: ISSUES TO CONSIDER

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  1. TEST TRACK RECONSTRUCTION:ISSUES TO CONSIDER David Jones HVSIA Annual Meeting, San Jose, Costa Rica August 21-23, 2013

  2. Introduction Reuse the full structure Reuse part of the structure Recycle Reconstruct Conclusions Key Issues

  3. Key Issues • Reuse the full test track structure • Overlay/reflective cracking/interlayers • Pavement preservation treatments • Reuse part of the test track structure • Mill and fill • Partial depth reclamation / cold in place recycling • Base only, with or without “protection” layer • Recycle the test track • Full-depth reclamation (FDR) • PDR/CIR • Rubblization/crack and seat • Total reconstruction

  4. Key Issues • Reuse the full test track • Overlay/reflection cracking/interlayers • Forensic test pits? • Retest on trafficked area to take base deterioration/ cracking into consideration? • Space for test on untrafficked area? • Effect of deformation? • Effect of aging on rutting performance? • Use existing cracks or saw cut cracks?

  5. Rutting

  6. Test Pits

  7. Key Issues • Reuse the full test track • Pavement preservation treatments • Objective of testing? • Test on trafficked or untrafficked area? • Age of pavement?

  8. Pavement Preservation

  9. Key Issues • Reuse part of the test track • Mill and fill • Untrafficked or trafficked? • Test pits? • Age/effect of underlying AC? • Artificial aging? • PDR • Same as mill and fill • Base • Untrafficked or trafficked? • Zone of influence? • Test pits? • Artificial aging? • Effect of moisture treatments?

  10. Milling on AC

  11. Milling on Concrete

  12. Crack and Seat

  13. Key Issues • Recycle the test track • FDR • Is thickness of AC representative? • Aging representative? • Effect of binder on mix design? • Effect of previous test on underlying area? • Effect of moisture? • Is variability representative? • Test pits? • Rubblization/crack and seat • Representative?

  14. FDR

  15. Key Issues • Total reconstruction • How deep to reconstruct? • Quantifying effect on subgrade?

  16. Conclusions • Take next test into consideration during planning of current test • Make sure you understand what you have • Deflection • GPR • Previous test data analysis

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