Date post: | 14-May-2015 |
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MNS ENGINEERS
Pavement Best Practicesfor Construction Management
In this training, we’ll cover construction perspectives, insights, and unique solutions regarding:
Trenching Operations
Common Pavement Failures
Pavement Restoration
TRAINING OVERVIEW
Pre-Construction
Early coordination with agency staff
Existing roads may not be designed to high enough standards
What to look for prior to construction...
TRENCHING OPERATIONS + PAVEMENT RESTORATION
The Construction Phase
Pre-construction pictures
Condition of trench walls
Caltrans vs. Greenbook specifications
Pavement installation methods
Red flags during installation
TRENCHING OPERATIONS + PAVEMENT RESTORATION
The Construction Phase
Pre-Construction Pictures
1. Condition of existing surface
2. Condition of subsurface structures
→ Some agencies will have video/photos of existing subsurface facilities
Condition of Trench Walls
3. Avoiding (where possible) conditions of wet and/or sandy soils
TRENCHING OPERATIONS + PAVEMENT RESTORATION
The Construction Phase
Caltrans vs. Greenbook Specifications
1. HMA or Asphalt Concrete
2. Know which specification and the year you’re referring to!
TRENCHING OPERATIONS + PAVEMENT RESTORATION
The Construction Phase
Pavement Installation Methods
1. Installation varies by pavement selection
→ Some areas deal primarily with asphalt pavements; yours may vary.
2. How to make great decisions about pavement, and what to take with you in the field
→ Gary’s 5 Key Points for Great Pavement Decision-Making
→ Gary’s 4 Essential Pieces of Field Equipment
3. Red flags during installation
TRENCHING OPERATIONS + PAVEMENT RESTORATION
TRENCHING OPERATIONS + PAVEMENT RESTORATION
Installation Varies by Pavement Selection
Calleguas deals primarily with asphalt pavement.
TRENCHING OPERATIONS + PAVEMENT RESTORATION
TRENCHING OPERATIONS + PAVEMENT RESTORATION
TRENCHING OPERATIONS + PAVEMENT RESTORATION
TRENCHING OPERATIONS + PAVEMENT RESTORATION
TRENCHING OPERATIONS + PAVEMENT RESTORATION
Gary’s 5 Key Points for Great Pavement Decision-Making
1. Conduct a pre-paving conference
2. Repair existing AC surface before paving
3. Start rolling above the minimum temperature (250°F)
4. Finish rolling above the minimum temperature (200°F)
5. Monitor AC temperature often in cold weather
Gary’s 4 Essential Pieces of EquipmentThat All Pavement Inspectors Should Carry
1. Thermometer
2. Folding Rule
3. AC Stabber (Probe)
4. Measuring Wheel
TRENCHING OPERATIONS + PAVEMENT RESTORATION
LET‘S REVIEW
Typical Pavement Failures
TRENCHING OPERATIONS + PAVEMENT RESTORATION
Review from our Pavement Design Training.
How pavement fails and what causes particular types of failures.
A CLOSER LOOK AT
Typical Failures: Alligator Cracking
TRENCHING OPERATIONS + PAVEMENT RESTORATION
CausesInadequate structural support/design, increase in traffic loading, poor construction, inadequate compaction.
RepairsSmall areas: dig out, improve drainage, patch.Large areas: placement of overlay on entire pavement surface.
A CLOSER LOOK AT
Typical Failures: Block Cracking
TRENCHING OPERATIONS + PAVEMENT RESTORATION
CausesAsphalt shrinkage, temperature cycling, poor compaction, age of binder.
RepairsCrack sealing or overlay, depending on severity of cracking.
A CLOSER LOOK AT
Typical Failures: Shoving
PAVEMENT MAINTENANCE AND REHABILITATION
CausesUsually occurs where traffic starts and stops or where asphalt abuts a rigid object, combined with an unstable asphalt layer or excessive subgrade moisture.
RepairsRemove distorted pavement. For small areas, patch; for large areas, overlay.
A CLOSER LOOK AT
Typical Failures: Raveling
TRENCHING OPERATIONS + PAVEMENT RESTORATION
CausesLoss of bond between aggregate particles and the asphalt binder; mechanical dislodging (although this cause is not common in Southern California).
RepairsDepending on size of area, patch or overlay.
A CLOSER LOOK AT
Typical Treatments
PAVEMENT MAINTENANCE AND REHABILITATION
A CLOSER LOOK AT
Typical Treatments
PAVEMENT MAINTENANCE AND REHABILITATION
A CLOSER LOOK AT
Typical Treatments
PAVEMENT MAINTENANCE AND REHABILITATION
MNS Engineers, Inc.TRANSPORTATION / WATER RESOURCES / GOVERNMENT SERVICES / FEDERAL
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