What a raker does along a longitudinal joint after the paver overlaps the cold edge: pushes the overlapped mix back off the cold side so it sits as a small ridge on the hot side, right at the joint line. The roller then compresses that extra material into the joint, raising density there. Bumping too much leaves a hole at the joint, and broadcasting the excess across the mat leaves loose coarse rock on the surface.
Just bump it back to the line, don't rake it across the mat, the rock's going to show.
Also heard as
- bumping the joint
- bump back
Related terms
Raker
A paving laborer who works behind the screed with a lute, fixing joints, edges and handwork.
Lute
A flat-bladed rake used by paving crews to move, level and smooth hot mix by hand.
Longitudinal joint
The seam running lengthwise between two adjacent paving passes, the usual weak spot in an asphalt road.
Joint matching
Setting the screed so the new mat overlaps the old edge slightly and sits just high enough to roll down flush.
Same word, different worlds
To make a small adjustment to an offset or position, usually a thou or less, to bring a size in.
ElectrotechnologyTo energise a motor for a split second to check its direction of rotation before running it properly.
Boilers & BurnersTo energize a motor, pump or burner for a second or two to check rotation or operation.
Lighting & Color ScienceTo flash a channel or group to full instantly, usually with a console button, to identify it or for effect.
RailroadingTo use seniority to take a job held by someone junior, who is then displaced.