1. Lessons Learned on Concrete Pavement Patching Virginia Concrete Conference March 9, 2012 Thomas R. Tate, P.E. Senior Pavement Engineer Hampton Roads District Materials

2. 2 Project Development Determine needed patch types How to set patch limits Establish accurate(?) quantities Include patch locations Traffic control, lane closure considerations (MOT)

3. 3 Project Development In the beginning: Identify (see) need Identify project limits Pavement evaluation Scoping meeting Develop contract

4. 4 Project Development Identify (See) Need Low pavement rating (low CCI) Rough pavement Failing joint sealant Visible distresses Poor maintenance history Customer complaints

5. 5 Project Development Identify Project Limits Original construction project limits Change in pavement type Change in pavement width Limit by physical boundaries Set limits by funding

6. 6 Project Development Pavement Evaluation, Why? Determine existing pavement thicknesses (mainline, shoulders, concrete thickness/type, base thickness/type, subgrade condition, etc.) Determine cause of observed distresses Determine structural capacity of existing pavement layers Condition of bases Condition of subgrade Material reactions? Drainage issues?

7. 7 Project Development Scoping Meeting Bring all stake holders together Funding (Maintenance or Construction) Materials Design Construction Traffic Engineering Structure & Bridge Operations Others

8. 8 Project Development Develop Contract Determine needed patch types How to set patch limits Establish accurate(?) quantities Include patch locations Traffic control, lane closure considerations (MOT)

9. 9 Project Development Determine Needed Patch Types Patch TypeJCPCRCP Type IX Type IIX Type IIIX Type IVX Anchor SlabX Approach SlabXX

10. 10 Project Development Patch Limits Jointed Concrete Pavement (JCP) Types I & II Minimum 6 ft long Full lane width (12 ft) Minimum 1 ft past/beyond distress (failed joint, pot hole, failed crack, etc.) Minimum 1 ft past/off existing joint Minimum 10 ft between patches

11. 11 Project Development Patch Limits Continuously Reinforced Concrete Pavement (CRCP) Type IV Minimum 6 ft long Full lane width (12 ft) Minimum 1 ft past/beyond distress (punch out, asphalt patch, cluster cracks, Y-cracks, etc.) Minimum 1 ft past/off existing transverse crack Minimum 10 ft between patches Headers?

12. 12 Project Development Accurate Quantities Patching Joint Sealing Crack Sealing Slab Jacking Shoulder Rehab Traffic Items (Guardrail, Pavement Markings, etc.) Know Limits of Work!!!!

13. 13 Project Development Accurate Quantities Patching – Estimating Quantities Shoulder survey (walk or in vehicle) Video survey Sample survey Others?

14. 14 Project Development Severity level 2 cluster cracking – patch.

15. 15 Project Development Severity level 1 cluster cracking

16. 16 Project Development Accurate Quantities Patching Work will be done one or more years after estimated What is purpose of patching? Will the concrete pavement be left exposed or will it be overlaid? Expect quantities to increase from time of estimate until pavement is actually patched (how many more winters will pavement go through?)

17. 17 Project Development Patch Locations Near other patches Near bridges or overpasses Near or within interchanges At pavement changes

18. 18 Project Development Traffic Control/Lane Closure Considerations Limitations of Operations (LOO) Will a waiver of standard LOO be needed Is there other work going on or planned in general vicinity of project? Operations (Tunnels, Bridges, TOC)

19. 19 Project Development Special Provisions or Copied Notes for: Concrete Patching Concrete Grinding Re-Sealing Joints Sealing Joints or Cracks Rideability Asphalt Work XJ-1 Joints

20. 20 Project Development Questions?