Grinding cement or concrete is a dirty and difficult task. By following a set of steps with the right equipment, you can grind cement to be used for everything from creating a terrazzo floor to fixing a toe-stubber in the sidewalk.
Things You'll Need
- Variable speed right-angle grinder with a 5/8-11 thread count arbor
- Diamond cup wheel
- Diamond blade sized to the grinder
- Carbide rubbing block
- 5-inch, 5/8-11 thread Velcro backer pad
- 5-inch diamond polishing pads - 60, 120, 220, 400, 600 grit
- GFCI cord connection
- Spray bottle or water hose
- Dust mask, eye protection, ear protection, gloves
- Shop vacuum
Flood the area to be ground with water and aggressively begin rubbing it with the carbide rubbing block in a circular motion. After a few minutes, wipe the slurry away with a squeegee or sponge to check your progress. This process works on shallow surfaces, such as a spill of concrete, a crack that has shifted to create an uneven section or a terrazzo finish.
Grind deeper surfaces using the cup on the angle grinder at a medium speed, and increase speed as you gain comfort operating the tool. Slightly angle the tool into the work to cut in and flatten it back out as you move along; don't try to grind the entire depth all at once, especially if it is very thick. Wear a dust mask and protection for your eyes, ears and hands.
Wet the surface slightly and begin polishing with the 60-grit pad. Because the area should stay wet to keep the pad cool, use a GFI on your cord to keep water from getting into the grinder. Wash the surface off before it dries after you are finished polishing.
How to Grind Concrete Floors With an Angle Grinder
Many reasons exist for you to use an angle grinder to grind concrete. For example, you may want to grind a drain...
How to Use a Masonry Grinder
A masonry grinder is a tool for grinding cement block, brick or concrete floors. There are several types of masonry grinders. Some...
How to Refinish Cement Steps
Refinishing concrete steps involves stripping off the old finish with a concrete grinder and applying a new coat of paint. Epoxy paints...
How to Use a Concrete Grinder
A concrete grinder has a variety of uses for the DIYer. You can use the grinder to smooth and polish concrete floors...
How to Use a Dremel to Grind Down High Spots in Concrete
The Dremel Multi-Max is a multifunctional tool that can effectively grind concrete. The Multi-Max is a compact, oscillating tool that employs swift...
Concrete Floor Grinding Tools
Concrete grinders remove any layers of paint, sealers or gunk that are stuck on top of your floor or driveway. In addition...