A Contractors Perspective J. Brent Moore Regional Manager - - PowerPoint PPT Presentation

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Feb 18, 2023 204 likes •392 views

Uniform Paving Platform A Contractors Perspective J. Brent Moore Regional Manager Branscome, Inc. - Richmond . Concerns for the Paving Contractor Safety Plant and Field Safety is the #1 Priority Mix Production Consistent

SLIDE 1

Uniform Paving Platform A Contractor’s Perspective

J. Brent Moore

Regional Manager Branscome, Inc. - Richmond.

SLIDE 2

Concerns for the Paving Contractor

 Safety – Plant and Field – Safety is the #1 Priority  Mix Production – Consistent and Within Spec  Mix Placement  Compaction  Density  Ride Quality  Profitability

SLIDE 3

Which Concerns Are Tied to the Paving Platform?

 Safety – Plant and Field  Mix Production – Consistent and Within Spec  Mix Placement  Compaction  Density  Ride Quality  Profitability

SLIDE 4

Mix Placement

 Distressed Pavement

SLIDE 5

Mix Placement

 Distressed Pavement  Distortions

SLIDE 6

Mix Placement

 Distressed Pavement  Distortions  Peeling Surfaces

SLIDE 7

Mix Placement

 Distressed Pavement  Distortions  Peeling Surfaces  Rutting

SLIDE 8

Mix Placement

 Distressed Pavement  Distortions  Peeling Surfaces  Rutting  Scabbing

SLIDE 9

Compaction

Non-Uniformity Impacts

 Roller Patterns

SLIDE 10

Compaction

Non-Uniformity Impacts

 Roller Patterns  Compression by Drum with Rutting

Steel Drum Roller

1.5” OL Thicker AC Due to Rutting

SLIDE 11

Compaction

Non-Uniformity Impacts

 Roller Patterns  Compression by Drum with Scabbing

Steel Drum Roller

1.5” OL Thinner AC Due to Scab

SLIDE 12

Density

 Target density established in control strip with uniform

section

 Weak areas with same roller pattern will have lower

density

 Thick or thinner sections due to rutting/scabbing will

impact density

 Scabs make break loose under rolling and impact density

SLIDE 13

Ride Quality

 Initial ride quality may be acceptable  Over time, rubber tired rollers (vehicle’s tires) will

complete compaction and distort the surface and lead to a poor ride

SLIDE 14

Profitability

Pay factors based on:

 In-place density testing  Final ride quality/improvement – Rideability Test

SLIDE 15

Achieving a Uniform Platform

Leveling courses for roads not milled

 Variable depth lift  Fills ruts  Assists in returning cross section to pavements

SLIDE 16

Achieving a Uniform Platform

Leveling courses for roads not milled Milled roads with scabbing

 Re-mill to remove scabs

SLIDE 17

Achieving a Uniform Platform

Leveling courses for roads not milled Milled roads with scabbing

 Re-mill to remove scabs (best approach)  Scratch course over scabs (alternate approach)

SLIDE 18

Win-Win-Win Solutions

Wins for VDOT

 Longer service life for surfaces  Lower life cycle costs

Wins for Contractor

 Increased profit potential  Optimized paving operations

Wins for the Traveling Public

 Smoother pavements  Longer lasting pavements  Lower vehicle operating costs  Fewer traffic disruptions (i.e., MOT)