Chapter 3 Strategy Selection
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Transcript of Chapter 3 Strategy Selection
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From… Maintenance Technical Advisory Guide (MTAG)
Chapter 3Strategy Selection
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Factors to Consider
Ride Skid Noise
http://www.dot.ca.gov/hq/oppd/pavement/qpavement.htm
Distress Types Durability/Longevity
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Treatment Selection Based on Pavement Condition
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Caltrans Approach to Selecting Maintenance Treatments
Assess Existing Pavement Conditions Determine the Feasible Treatment
Options Analyze and Compare the Feasible
Options
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Caltrans Approach to Selecting Maintenance Treatments
Assess Existing Pavement Conditions• Conduct visual site inspection and/or review
project information• Perform testing on the existing pavement, as
conditions require• Define the performance requirements for the
treatment
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Caltrans Approach to Selecting Maintenance TreatmentsData Item Grind ing Load Transfer
Restor ationPartial-Depth
RepairFull-Depth
Repair
Existing Pavement Structure X X X X
Original Construction Data * * * *
Age * * *
Materials Properties X * *
Subgrade
Climate
Distress X X X X
Skid *
Accidents *
NDT X *
Destructive Testing/Sampling * * X X
Roughness *
Surface Profile X
Drainage X X
Previous Maintenance * * *
Utilities X
Traffic Control Options X X X X
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Caltrans Approach to Selecting Maintenance Treatments
Determine the feasible treatment options• The purpose is to determine what treatments
might work for a given pavement condition • Treatment’s ability to address the functional
and structural condition• Feasibility is not a function of affordability
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Caltrans Approach to Selecting Maintenance Treatments
A feasible alternative is one that addresses all identified distresses of the pavement, provides the desired future performance over the life of the treatment, and fits within identified constraints, which may include:• Construction windows.• Traffic flow conditions.• Overhead clearances.• Right-of-way.• Funding.
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Caltrans Approach to Selecting Maintenance Treatments
Several treatments may be feasible for a given set of conditions.
Therefore, effort should be made to identify as many feasible treatment alternatives as possible for a given project.
With multiple alternatives, advantages and disadvantages of each treatment can be compared.
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Feasible Treatments - Structural Distress Type Preservation Techniques
Transverse Cracking Joint and crack sealingLongitudinal Cracking Joint and crack sealing
Slab stabilization Corner Cracking Joint and crack sealing
Edge joint resealingSlab stabilization
Intersecting Cracking Joint and crack sealingSlab stabilization
Spalling Partial-depth repair Joint and crack resealingFull-depth repair
Pumping Joint and crack resealingSlab stabilization
Blow ups Full-depth repairsD-cracking (not California issue)
Partial- or full-depth repair; Joint and crack resealing
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Feasible Treatments - Functional
Distress Type Preservation TechniquesSurface Polishing Diamond grinding
GroovingNoise See Caltrans website for the
latest informationScaling Diamond grindingPopouts Diamond grinding
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Proposed Trigger Values and Expected Life
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Caltrans Approach to Selecting Maintenance Treatments
Analyze and Compare the Feasible Options• Several treatments may be feasible• Cost and life of the treatments vary• Effect of the treatment on the life extension of the
existing pavement• Other factors to consider: cost effectiveness,
treatment timing, traffic level, and constructability
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Approach for Selecting Maintenance Treatments
Cost Effectiveness• Equivalent Annual Cost• Life Cycle Cost Analysis
Selection of Maintenance Treatments• Performance and constructability• Customer satisfaction• Ranking of selected treatments by rating
overall importance
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Approach for Selecting Maintenance Treatments
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Summary
Applying the Right treatment to the Right pavement
at the Right timeis the Core of
Pavement Preservation