Polishing and Grinding Concrete

There are a range of finishes possible from a single piece of concrete. A deep polish will expose more of the large aggregate in the mix, while a light polish will only expose the small specks of sand. A consistent and uniform finish can be achieved by simply burnishing the surface.

Burnishing Pads for Concrete
Burnishing Concrete | CHENG Concrete Exchange

Burnishing Pads attach to an orbital polisher with a hooked backer pad. The burnishing pads themselves are like steel wool, but they are diamond impregnated to cut the concrete. They come in a range of grits, just like sandpaper.

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Polishing Concrete Countertops
Polishing Concrete| CHENG Concrete Exchange

This guide will show you how to polish concrete. There are a range of finishes possible from a single piece of concrete. Normally polishing is accomplished using a variable speed concrete polisher with a set of diamond sanding discs.

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Grinding Concrete Countertops
Grinding Concrete | CHENG Concrete Exchange

When doing pre-cast concrete projects, it’s not usually necessary to use a grinder. Since the formwork is doing most of the shaping, the only place you would need to use a grinder would be on a part of the project that is hidden (like the back side of a concrete countertop).

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Acrylic Slurry for Concrete Countertops
Concrete Slurry | CHENG Concrete Exchange

Slurry is a mixture of cement paste, pigment, and water. It is used to fill in the small air bubbles in the surface of the concrete. This is especially important in something like a concrete countertop, because bacteria can get into those holes and grow. Otherwise it’s an aesthetic preference.

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