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Regional Asphalt Seminar: Longitudinal Joint Monitoring Efforts

Regional Asphalt Seminar: Longitudinal Joint Monitoring Efforts. February 20, 2014 Todd Rorrer Central Office Materials Regional Asphalt Field Engineer. Presentation Outline. History of Longitudinal Joint Density District / State Review Going forward in 2014.

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Regional Asphalt Seminar: Longitudinal Joint Monitoring Efforts

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  1. Regional Asphalt Seminar:Longitudinal Joint Monitoring Efforts February 20, 2014 Todd Rorrer Central Office Materials Regional Asphalt Field Engineer

  2. Presentation Outline • History of Longitudinal Joint Density • District / State Review • Going forward in 2014

  3. 1 - History on Longitudinal Joint Density

  4. 2005 Joint VAA & VDOT Longitudinal Joint Construction Memo • 2006 Longitudinal Joint Study Initiated • 2009 Construction and Monitoring was Increased • 2010 Longitudinal Joint Density Report on 2005 to 2009 Data • 2011 AQTF • 2013 Implement Specification Change to Monitor and Correct ongoing construction techniques of the Joint during construction (Recent) History of Virginia’s Efforts

  5. Keep the LJD on everyone's Radar, When we monitor the density we achieve good performance When it falls off he Radar and the performance suffers Collect the Data! Able to analyze trends Where are we doing well Where are we doing not so well Confined vs. Unconfined, is the same value achievable What about SMA? Can we monitor our SMA Joints without coring WHAT WE HOPED TO Achieve with the 2013 LJD initiative

  6. Longitudinal Joint Construction • Why is longitudinal joint construction important? Achilles Heel for asphalt pavements if not constructed properly, can be the main entry point for water Deterioration of joint leads to early pavement maintenance • Many different approaches to construct the joint To which Ken Arthur will speak • Specifications now require that Joint density shall be at least 95% of Target Control Strip Density.

  7. Goal after 5 years old

  8. 2 - District/state review of data

  9. 2013 Collection Efforts and Review • All Paving conducted in 2013 was monitored • Data from 71 Separate Construction Projects and Paving Schedules were analyzed

  10. Confined vs. Unconfined The Analysis of the Confined Measurements vs. Unconfined Measurements showed no Significant in the ability to achieve 95% compaction of the unconfined joint

  11. District Breakdown of Individual Readings

  12. Percent Failure by Project

  13. Bristol

  14. Salem

  15. Lynchburg

  16. Richmond

  17. Hampton Roads

  18. Fredericksburg

  19. Culpeper

  20. Staunton

  21. NOVA

  22. 3 - Going Forward in 2014

  23. Continue to collect the data in 2014 Increased emphasis on quality joint construction Going Forward in 2014

  24. Regional Asphalt Seminar:Longitudinal Joints February 20, 2014 Central Office Materials

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