General Issues an Asphalt Technology Longitudinal Joints.

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Presentation transcript:

General Issues an Asphalt Technology Longitudinal Joints

I – 81 Pennsylvania April 2005

I-84, New York April 2005

I – 84 Connecticut April 2005

Penna. Turnpike MP

Industry MUST exercise more care in batching placing and compacting asphalt pavements The Port Authority of New York & New Jersey “Raise the bar or lose the work”

This is the exception in Maryland, but

Pave the first lane straight

Compacting Unconfined Edges Unconfined edges may shove out First pass ” from edge to develop lateral confinement Second pass slight overhang Compacted portion supports weight of drum

Compacted Mat Uncompacted Mat Typical Overlap on Longitudinal Joints Thickness of Rolldown mm

Bump the joint

Wedged Edge

Longitudinal Joint Compaction Both drums on hot side first pass Force hot material against joint Hot Mat Cold Mat

Longitudinal Joint

Do We Need a Joint Density Specification or Prescription Specification ?