Lessons Learned on Concrete
Pavement Patching
Virginia Concrete Conference
March 9, 2012
Thomas R. Tate, P.E.
Senior Pavement Engineer
Hampton Roads District Materials
Project Development
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Determine needed patch types
How to set patch limits
Establish accurate(?) quantities
Include patch locations
Traffic control, lane closure considerations (MOT)
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Project Development
In the beginning:
• Identify (see) need
• Identify project limits
• Pavement evaluation
• Scoping meeting
• Develop contract
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Project Development
Identify (See) Need
• Low pavement rating (low CCI)
• Rough pavement
• Failing joint sealant
• Visible distresses
• Poor maintenance history
• Customer complaints
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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
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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?
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Project Development
Scoping Meeting
Bring all stake holders together
• Funding (Maintenance or Construction)
• Materials
• Design
• Construction
• Traffic Engineering
• Structure & Bridge
• Operations
• Others
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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)
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Project Development
Determine Needed Patch Types
Patch Type
JCP
Type I
X
Type II
X
Type III
X
CRCP
Type IV
X
Anchor Slab
X
Approach Slab
X
X
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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
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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?
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Project Development
Accurate Quantities
• Patching
• Joint Sealing
• Crack Sealing
• Slab Jacking
• Shoulder Rehab
• Traffic Items (Guardrail, Pavement Markings, etc.)
Know Limits of Work!!!!
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Project Development
Accurate Quantities
Patching – Estimating Quantities
• Shoulder survey (walk or in vehicle)
• Video survey
• Sample survey
• Others?
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Project Development
Severity level 2 cluster cracking – patch.
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Project Development
Severity level 1 cluster cracking
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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?)
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Project Development
Patch Locations
• Near other patches
• Near bridges or overpasses
• Near or within interchanges
• At pavement changes
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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)
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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
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Project Development
Questions?
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