A compactor is a machine or mechanism used to material soil through compaction in construction industry.
Road roller for compaction
Road roller for compaction
In construction, there are three main types of compactor:


 The roller type compactors are used for compacting crushed rock as the base layer underneath concrete or stone foundations or slabs.
The plate compactor has a large vibrating base plate and is suited for creating a level grade, while the jumping jack compactor has a smaller foot.
The jumping jack type is mainly used to compact the backfill in narrow trenches for water or gas supply pipes etc. Road rollers may also have vibrating rollers.