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The plate compactor, vibrating plate, or tamper, has a large vibrating baseplate and is suited for creating a level grade, while the rammer compactor has a smaller foot. The rammer, or trench rammer, is mainly used to compact the backfill in narrow trenches for water or gas supply pipes etc. Road rollers may also have vibrating rollers.
In 1936 the vibratory compactor was developed by a mechanical engineer Hilding Svenson. In 1940 the company name changed to AB Vibro-Verken. In 1947 it launched the first vibratory plate compactor, which weighed 1.5 tonnes, being nicknamed the frog. It opened its research laboratory in 1948 and manufactured the first vibratory road roller in 1953.
Vibratory plate compactors are the lightest and best for smaller projects, while heavy-duty plate compactors exert the most force and work well for large-scale projects, such as paving. A handheld tamper is a small compactor that utilizes static force , which is when only the dead weight of the equipment and pressure the operator applies to it ...
The vibratory plate is controlled by a tablet. The area to be compacted is drawn in on the touchscreen using your finger. Compaction work is seamlessly documented, as the vibratory plate digitally records all steps taken and this automatically provides a daily report sheet for contractors.
The construction industry is the second field of application of Lombardini engines. Machinery such as trench rollers, reversible compactors, single drum rollers, vibratory plates, mini rollers etc, are an example of that. Some major European OEMs have some Lombardini in their products.
In geotechnical engineering, soil compaction is the process in which stress applied to a soil causes densification as air is displaced from the pores between the soil grains. When stress is applied that causes densification due to water (or other liquid) being displaced from between the soil grains, then consolidation, not compaction, has occurred.