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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 February 2009, Wacker Construction Equipment AG underwent a change of legal form and assumed its current name of Wacker Neuson SE. Between 2011 and 2017, Wacker Neuson produced, in its plant in Hörsching, mini excavators for Caterpillar. This resulted in the Austrian subsidiary being awarded distinction in Austria’s Leading Companies in 2015.
The plate compactor consists of a handle and head that holds the motor. When started, the plate moves up and down within the head, and the operator pushes the compactor around the desired area. Plate compactors work best with granular soils, such as gravel and sand. They come in a variety of sizes due to the flexibility of the push motion.
Caterpillar soil compactor equipped with padfoot drum, being used to compact the ground before placing concrete Antique "Kemna" steamroller. A road roller (sometimes called a roller-compactor, or just roller [1]) is a compactor-type engineering vehicle used to compact soil, gravel, concrete, or asphalt in the construction of roads and foundations. [1]
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.
Vibrating – a stress is applied repeatedly and rapidly via a mechanically driven plate or hammer. Often combined with rolling compaction (see below). Gyrating – a static stress is applied and maintained in one direction while the soil is a subjected to a gyratory motion about the axis of static loading. Limited to laboratory applications.