general issues an asphalt technology longitudinal jointsspave/old/technical... · industry must...

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General Issues an Asphalt Technology Longitudinal Joints

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Page 1: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”

General Issues an Asphalt TechnologyLongitudinal Joints

Page 2: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”

I – 81 Pennsylvania

April 2005

Page 3: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”

I-84, New York

April 2005

Page 4: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”

I – 84 Connecticut

April 2005

Page 5: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”
Page 6: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”

Penna. Turnpike

MP 94 - 99

Page 7: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”

Industry MUST exercise more Industry MUST exercise more care in batching placing and care in batching placing and

compacting asphalt pavementscompacting asphalt pavements

The Port Authority of New York & New Jersey

“Raise the baror

lose the work”

Page 8: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”

This is the exception in Maryland, but

Page 9: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”

Pave the first lane straight

Page 10: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”

Compacting Unconfined Edges

• Unconfined edges may shove out

• First pass 6 - 12”from edge to develop lateral confinement

• Second pass slight overhang

• Compacted portion supports weight of drum

Page 11: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”

Compacted Compacted MatMat

Uncompacted Uncompacted MatMat

Typical Overlap on Typical Overlap on Longitudinal JointsLongitudinal Joints

Thickness of Thickness of RolldownRolldown

2525--35 mm35 mm

Page 12: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”

Bump the joint

Page 13: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”

Wedged Edge

Page 14: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”

Longitudinal Joint Compaction

• Both drums on hot side first pass

• Force hot material against joint

Hot Mat

Cold Mat

Page 15: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”

Longitudinal Joint

Page 16: General Issues an Asphalt Technology Longitudinal Jointsspave/old/Technical... · Industry MUST exercise more care in batching placing and ... may shove out • First pass 6 - 12”

Do We Need a Joint Density SpecificationDo We Need a Joint Density Specification

oror

Prescription Specification ?Prescription Specification ?