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| Advisories |
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| Cohesive Soils |
Upright Tamp or Sheepsfoot |
| (Mainly silts and clays) |
Vibratory Roller |
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| Granular Soils |
Flat Plate Tamp or Smooth Drum |
| (Mainly sands & gravels) |
Vibratory Roller; Upright Tamps |
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| Mixed Soils |
Upright Tamps, Sheepsfoot |
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Vibratory Rollers, Smooth Drum |
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Vibratory Rollers, Plate Tamps |
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| Definitions |
| Grinders
use horizontally rotating discs to level, smooth or clean
the top surface of a concrete slab. Grinders come with
a multi-accessory disc that can be loaded with long lasting
Dyma-Serts, Strip-Serts, grinding stones or star wheels
to remove rough finishes, flatten uneven areas or clean
concrete slabs of sealers, paints or mastics. Primarily
designed to work the top surface of a floor over large
areas, grinders can also be used effectively to level
uneven joints or high spots of 1/16" to 1/8"
where small areas are the only concern. Grinders provide
contractors a smoother finish than scarifiers or scabblers.
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| Scarifying
machines apply a cutting wheel to the concrete surface,
by the way of a cutting drum that flails the surface,
leaving a clean, textured or roughened finish. Scarifiers
are also referred to as planers, milling machines, rotary
cutters or simply surface-preparation machines. Scarifiers
allow you to control the various styles of interchangeable
cutter assemblies, that can be used for cleaning, grinding
and light or heavy milling . Production rates range from
350 to 1,500 square feet per hour (dependant on machine
size and horsepower for a 1/8" removal depth of 3,500
PSI concrete. |
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| Scabblers use compressed
air to hammer piston-mounted bits into the concrete surface.
They tend to roughen the concrete surface more than grinding
or scarifying. Scabblers can remove up to 1/4" of
concrete surface in a single pass. The actual production
rate depends on the strength of the concrete. A typical
removal rate for a machine with a 12" working width
is 200 to 250 square feet per hour at 1/8" depth. |
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