For the initial passing of compaction, where should the first pass be made relative to the paver?

• A. On the hot joint, directly behind the paver
• B. On the cold joint, far ahead of the paver
• C. In the center of the mat
• D. At the finished edge

Answer: (A)

The first rolling pass should be on the hot joint, directly behind the paver. This area is still at high temperature and workable, so compacting there densifies the freshly laid material and helps seal the joint between the new mat and what’s already down. If you roll ahead on a cold joint, or try to compact the center or the finished edge first, you’ll end up with poorer density, more air voids, and a weaker joint because the material has cooled and won’t consolidate as well. Starting at the hot joint ensures the edge and joint are properly compacted from the outset, setting a solid base for the rest of the mat.