Pavement Best Practices for Construction Management

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



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



Caltrans vs. Greenbook Specifications

1. HMA or Asphalt Concrete

2. Know which specification and the year you’re referring to!



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



Installation Varies by Pavement Selection

Calleguas deals primarily with asphalt pavement.


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


LET‘S REVIEW

Typical Pavement Failures


Review from our Pavement Design Training.

How pavement fails and what causes particular types of failures.

A CLOSER LOOK AT

Typical Failures: Alligator Cracking


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


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


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

MNS Engineers, Inc.TRANSPORTATION / WATER RESOURCES / GOVERNMENT SERVICES / FEDERAL

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Pavement Best Practices for Construction Management

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