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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). - PowerPoint PPT Presentation
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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 Partial-Depth Synthetic Resin PatchSynthetic Resin Patch
Finished Partial-Depth Repair (before diamond grinding)
Conventional Diamond Grinding
Cuts a 10’ – 14’ Flat Surface
From wheels behind the grinding head
To the front wheels
Diamond Grinding Machine
Diamond Grinding
Some asphalt Some asphalt was left in was left in localized low localized low areasareas
Typical Final Surface(no asphalt remaining)
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
Project CostsProject Costs Polyurethane Slab Stabilization:Polyurethane Slab Stabilization:
$4.32 /pound for 150,000 pounds ($648,000)$4.32 /pound for 150,000 pounds ($648,000)
Pre-Cast Panels:Pre-Cast Panels: $472.89/s.y. for 4,900 s.y. ($2,317,161)$472.89/s.y. for 4,900 s.y. ($2,317,161)
Synthetic resin Partial-Depth Repairs:Synthetic resin Partial-Depth Repairs: $1,113.95/s.y. for 490 s.y. ($545,835.50)$1,113.95/s.y. for 490 s.y. ($545,835.50)
Diamond Grinding:Diamond Grinding: $7.63 s.y. for 266,750 s.y. ($1,963,280)$7.63 s.y. for 266,750 s.y. ($1,963,280)
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 surfaceProvided final surface texture
Pavement still performing well today
Washington SR 522
Washington SR 522
More Buried Treasure on PA I-80?
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.
AcknowledgmentsAcknowledgments
Dan Frentress, P.E.Dan Frentress, P.E. [email protected]@wcta.net
International Grooving and Grinding International Grooving and Grinding Association (Association (www.igga.net))
Questions ?
International Grooving and Grinding Associationwww.igga.net
Preparation of Repair Area
Fine-grading Bedding MaterialFine-grading Bedding Material
Compaction of Bedding Compaction of Bedding MaterialMaterial