AAPTP: Airport Asphalt Technology Program

Bumping

A worker bumps a transverse joint at the beginning of a paver run. The worker is standing on the previous night's work, which was cut back slightly to make an even straight joint.

Bumping a transverse joint

Sequence (from top to bottom) for bumping a HMA joint.

Sequence (from top to bottom) for bumping a HMA joint.

Handwork technique used on joints to build up a small ridge of mix at the joint for the roller to compact. This can help create higher density at the joint after roller compaction.