HMA Construction Program HMA Construction Program

Module 7 – Joint Construction Module 7 – Joint Construction

Module 7 ObjectivesModule 7 Objectives

• Objective of Joint ConstructionObjective of Joint Construction

• Types of Transverse Joint Construction Types of Transverse Joint Construction MethodsMethods

• Types of Longitudinal Joint Construction Types of Longitudinal Joint Construction MethodsMethods

• Proper Joint Luting Proper Joint Luting

Butt JointButt Joint

Rolled MatRolled Mat

Rolled MatRolled Mat

New MatNew Mat

PaperPaper

Papered Transverse JointPapered Transverse Joint

RemoveRemove paperpaper

& ramp& ramp

A good rule of thumb is to raise the screed 20 A good rule of thumb is to raise the screed 20 percent more than the compacted thickness.percent more than the compacted thickness.

Staggered Paving JointsStaggered Paving Joints

Compacted Compacted MatMat

Uncompacted Uncompacted MatMat

Typical Overlap on Typical Overlap on Longitudinal JointsLongitudinal Joints

Thickness of Thickness of RolldownRolldown

25-35 mm25-35 mm

Compacted Compacted MatMat

Uncompacted Uncompacted MatMat

Mix “Bumped Back” to JointMix “Bumped Back” to Joint

Module 7 – ObjectivesModule 7 – Objectives

• Objective of Joint ConstructionObjective of Joint Construction

• Types of Transverse Joint Construction Types of Transverse Joint Construction MethodsMethods

• Types of Longitudinal Joint Construction Types of Longitudinal Joint Construction MethodsMethods

• Proper Joint Luting Proper Joint Luting