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Technical Article

How to Polish Concrete with diamond grinding tools

It is simply but, polishing concrete is similar to sanding wood. Heavy-duty polishing machines equipped with progressively finer grits of diamond-impregnated segments or diamond grinding shoes are used to gradually grind down surfaces to the desired degree of shine and smoothness.


The process begins with the use of coarse diamond segments bonded in a metallic matrix, we call it diamond grinding shoes. These segments are coarse enough to remove minor pits, blemishes, stains, or light coatings from the floor in preparation for final smoothing. Depending on the condition of the concrete, this initial rough grinding is generally a three to four step process.


The next steps involve fine grinding of the concrete surface using diamond abrasives embedded in a plastic or resin matrix, we can call it floor polishing pads or diamond polishing pads. Crews use ever-finer grits of polishing disks  until the floor has the desired sheen. For an extremely high-gloss finish, a final grit of 1500 or finer may be used. Experienced polishing crews know when to switch to the next-finer grit by observing the floor surface and the amount of material being removed.


During the final polishing step, some contractors spread a commercial polishing compound onto the surface to give the floor a bit more sheen. These compounds also help clean any residue remaining on the surface from the polishing process and leave a dirt-resistant finish.

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