How to Properly Prep Your Concrete Floor with a Shaver

Shaving concrete is a precise preparation method for the quick removal of a thin layer of concrete or concrete coating from the surface of contaminated floors, ceilings and walls. A reliable process for commercial, industrial and decommissioning contractors, shaving removes material at a uniform depth with one pass of the equipment, leaving a polished surface.

Concrete shaving is most valuable for a variety of floor applications:

  • Leveling floors that have curled at the joints
  • Removing existing or concrete floor toppings without causing surface damage
  • Removing accumulated layers of existing concrete floor coatings

Shaving versus Scabbling

When applied under the correct conditions, shaving is typically a more efficient preparation method than scabbling, which uses a chipping and hammering machine that can remove more material than necessary. This in turn can produce much more dust and secondary waste that needs to be controlled and contained at the job site.

The CONTEC CT320 Shaver

If you need to shave concrete, asphalt or steel floors, the CONTEC CT320 concrete floor shaver is the largest and most aggressive floor shaver on the market today. It’s made for the absolute toughest applications and floors and used to shave, mill, scarify or plane horizontal, dry floors with or without a coating. Precision aligned, heavy-duty bearings ensure low maintenance and trouble-free operation. The CONTEC CT320 is used in conjunction with:

  • a diamond cutting drum
  • carbide tipped cutters capable of scabbling, planing and grooving for a textured look to concrete
  • a milling drum with carbide-tipped cutters to strip away thermoplastic road or runway markings

See How the CT320 Operates

In this instructional video, Runyon Surface Prep’s tech support rep Dan Knuth shows you:

  • how to wire the phase-sensitive power controls correctly
  • how to use the manual soft-start procedure for turning on the machine
  • how to hook up and use the vacuum hose ports
  • how to engage the transport mode and cutting mode
  • how to set and stabilize the cut depth
  • how to drop the drum blades for cutting
  • how to turn the machine back and forth in a left-right direction
  • how to cut a straight line
  • how to set the self-propelled machine in the forward and reverse direction
  • how to use the potentiometer to remove concrete
  • how and when the diamond drum is set to level

Easy Operation Tips

  • After mounting the appropriate tools, the operation of the shaver can begin.
  • Never switch the motor of the shaver on while the tools still touch the floor.
  • The lever of the height adjustment has to be in the upper position and the hand wheel of the height adjustment must be turned anti-clockwise as far as possible before the shaver is switched on.
  • Always lift the shaver and the tools clear from the floor and then switch the motor on.
  • Switch the motor on before lowering the shaver with the lever to the operating position.
  • Turn the hand wheel of the height adjustment until the tools are lowered to the
  • floor and until you achieve the required finish.
  • Lowering the tools too much decreases the performance of the shaver, destroying the shafts in the drum and the bearings of the machine.
  • Heavy dust can be avoided by connecting a dust collector to the dust port.
  • The vibration damped handle bar ensures an easier operation.
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