- Tire size
- Tire ply
- Inflation pressure
There are pneumatic rollers which have the capacity to increase its tire pressure during compaction . Initial compaction is carried out with low pressure . The roller increased its tire pressure in subsequent operations . They are used for fine grained soil .
- Sheep foot roller – Sheep foot rollers are steel wgeaks equipment with protuded cylindrical projection of 20-25cm. They are suitable for compacting fine grained material , but generally is not suited for cohesionless granular material . They compact the soil kneading type of action . These rollers are helpful in breaking the lumps or clods present in the soil . These rollers aerates the soil during compaction . Thus , they are suitable for compaction soil heavy in moisture content above the optimum level .
- Vibratory Compaction equipments – Vibratory rollers compact the soil through impact forces . These forces result in compaction greater than the equivalent static load . Vibratory rollers are suitable for coarse grained soil . These rollers may be pulsating weight type . Plate compactors are widely used in the building construction for compacting soil in the room . Power tamper is a drop weight type vibrating compactor . Vibratory roller can be pad tool type. Vibratory rollers can be used for all types of soil except for plastic clays .
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