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Fully-grouted repair, ready for Diamond Grinding

Fully-grouted repair, ready for Diamond Grinding. Partial Depth Repair. Patch Area Primed for TechCrete. Crafco Product TechCrete. Repair area after removal and sandblasting. Partial-Depth Synthetic Resin Patch. Finished Partial-Depth Repair (before diamond grinding).

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Fully-grouted repair, ready for Diamond Grinding

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  1. Fully-grouted repair, ready for Diamond Grinding

  2. Partial Depth Repair Patch Area Primed for TechCrete

  3. Crafco Product TechCrete Repair area after removal and sandblasting

  4. Partial-Depth Synthetic Resin Patch

  5. Finished Partial-Depth Repair (before diamond grinding)

  6. Conventional Diamond Grinding • Cuts a 10’ – 14’ Flat Surface • From wheels behind the grinding head • To the front wheels

  7. Diamond Grinding Machine

  8. Diamond Grinding Some asphalt was left in localized low areas

  9. Typical Final Surface(no asphalt remaining)

  10. Ride Quality Data • 2007 IRI (microsurfacing) = 160.94 in/mi • IRI (after asphalt milling) = 222.80 in/mi • IRI final (after CPR and diamond grinding) = 112.00 inches/mile

  11. Project Costs Polyurethane Slab Stabilization: $4.32 /pound for 150,000 pounds ($648,000) Pre-Cast Panels: $472.89/s.y. for 4,900 s.y. ($2,317,161) Synthetic resin Partial-Depth Repairs: $1,113.95/s.y. for 490 s.y. ($545,835.50) Diamond Grinding: $7.63 s.y. for 266,750 s.y. ($1,963,280)

  12. Another Example of “Buried Treasure”:Washington SR 522 • 2002 WashDOT rehab project • Old overlays and asphalt patches removed • Full-depth PCC repairs of damaged concrete • Replaced widened asphalt lanes with full-depth concrete lanes • Diamond ground entire surface • Provided final surface texture • Pavement still performing well today

  13. Washington SR 522

  14. Washington SR 522

  15. More Buried Treasure on PA I-80?

  16. Summary • Innovative, cost-effective pavement maintenance and repair solutions are needed in today’s financially challenging times. • Many concrete pavements “buried” under asphalt can be restored cost-effectively. • The RAP removed from overlaid PCCP has value and can help reduce project costs.

  17. Acknowledgments • Dan Frentress, P.E. • dfren@wcta.net • International Grooving and Grinding Association (www.igga.net)

  18. International Grooving and Grinding Association www.igga.net Questions ?

  19. Preparation of Repair Area

  20. Fine-grading Bedding Material

  21. Compaction of Bedding Material

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