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Wikipedia

Tamper (tool)

A tamper is a device used to compact or flatten an aggregate or another powdered or granular material, typically to make it resistant to further compression or simply to increase its density.

Video of construction workers tamping a road surface

Examples edit

  • Small, handheld tampers are used to compress ground coffee into a puck to prepare espresso.
 
A fancy coffee tamper
  • Manual or powered tampers compact gravel before laying a concrete or brick patio or walkway so that the underlying gravel layer does not settle over time, or compress the fill in a utility trench as seen in the illustration.
  • Self-propelled, mechanised ballast tamping machines, which compact the ballast underneath rail tracks.
  • Preparing some firearms and artillery pieces for firing may involve tamping the charge, such as explosive material or a projectile, into the barrel. For example, muzzle loaders.
  • A fireplace can be tamped with a poker or similar tool to compress the material being burned (wood, coal, peat etc...). This improves the heat/burning efficiency, by reducing the volume of burning material that is exposed to airflow. This is often confused with damping - which involves reducing the intensity of the burn by restricting the flue or by the use of any fire retarding material such as water.

Tampers in construction edit

Within the construction field, different types of tampers can be used for different purposes, spaces, and materials.

  • A jumping jack, or rammer, is a relatively small, hand-operated compacter.[1] It uses vibratory force, which is when mechanical force is used in addition to the machine's weight to compact the materials. The jumping jack is composed of a motor, handle, and head. When the motor is started, the head is moved up and down, and the operator steers the machine around the desired area.[2] Jumping jacks work well in small areas and are good for cohesive soil, or soil with a large clay content.[3] The video shows a jumping jack being used in construction to prepare for paving.
  • A plate compactor, or plate tamp, is another hand-operated compactor that also uses vibratory force.[1] 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. 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 compact the materials.[1] These tampers do not have a motor, only a flat plate attached to a handle.[4] The plate is placed on the material the operator wishes to compact and pressed down. Handheld tampers are best used with soil and other small-scale projects due to the lack of great force from mechanical elements.

See also edit

References edit

  1. ^ a b c WebFX (2022-12-07). "Choose the Best Compaction Equipment for Construction | Blog". Thompson Tractor. Retrieved 2024-02-22.
  2. ^ Trying Out A Jumping Jack Compactor!, retrieved 2024-02-22
  3. ^ Occupational Safety and Health Administration (2020-02-18). "1926 Subpart P App A - Soil Classification." U.S. Department of Labor. Retrieved 2024-02-21.
  4. ^ "Tampers - MARSHALLTOWN®". marshalltown.com. Retrieved 2024-02-22.


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