pavement best practices for construction management
DESCRIPTION
Tips from the construction management team at MNS Engineers, Inc. Types of pavement failure (including causes and fixes), treatments, and installation best practices.TRANSCRIPT
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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