What is the minimum requirement for rolling to be effective on compaction?

The minimum requirement for rolling to be effective in compaction is to ensure that the roller passes over the material with a specific weight limit that is appropriate for the type of material being compacted. This criterion emphasizes the importance of utilizing the correct roller weight relative to the materials being compacted, as insufficient weight can lead to inadequate compaction, while excessive weight may lead to over-compaction or cause damage to the underlying materials.

While performing multiple passes may help achieve better compaction, the essential factor is the weight of the roller itself. Having a specific weight limit means that the roller is suitable for effectively densifying the material. Additionally, rolling until roller marks are visible, or using only pneumatic tired rollers, might not align with the compaction needs for all material types, as each has its unique specifications based on soil conditions, moisture content, and required density.