Subgrades & Subbases for Concrete Slabs - Concrete Network
The type of soil (or subgrade material) determines the type of equipment needed for compaction: Cohesive soils need to be sheared to get compaction, so you need a machine that has high impact force. A rammer is the best choice, or for bigger jobs, a pad-foot roller (similar to a sheepsfoot roller). Lifts for compaction of cohesive soils should ...