TransGrind

A grinding wheel is a precision tool with thousands of cutting points on its surface, abrasive grains that are held in place by a bond matrix and separated by pores.   These pores are hollow spaces between abrasive grains and the bond , which help with the clearance of discarded metal chips in the grinding process. When the wheel is in use, the abrasive grains cut into the material that is being ground, removing the unwanted surface material in small chips. During grinding, the cutting points on the abrasive grains are worn flat and becoming increasingly blunt. At the same time, the increased friction causes a build-up of heat, which fractures the abrasive grain and exposes new cutting edges or begins to disintegrate the bond bridges that hold the abrasive grains in place. In normal vitrified grinding, the wheel has to be dressed using a dressing tool. By varying the properties of the abrasive, the type of bond, the wheel’s construction, it is possible to produce grinding wheels wi...

There are several ways to repair rough/uneven surfaces. The first and most common method is to grind and polish using a wet polisher and  diamond polishing pads  (and possibly a  diamond grinding cup wheel , depending on the severity of the imperfections). You would begin with the lowest grit necessary and work your way up. Usually you will go up to at least 200 grit. You can continue to polish higher but keep in mind that some stains and sealers won’t adhere to highly polished concrete. Wet polishing can be messy so some people select for a dryer option, like  diamond grinding disc . They start with a fairly aggressive 60 grit and go up to 200 grit. These are not diamond in resin like the  wet polishing pads , they are electroplated diamond discs. This means they don’t require such a high RPM and can be used on a regular palm sander. This won’t smooth the surface to a high gloss finish that the wet polisher will but it will give the concrete a nice honed finish...

It is important to know the difference between concrete grinding and concrete polishing, because although you might think you want concrete grinding, it might be better to use concrete polishing to achieve your purpose. Concrete Grinding Concrete grinding is for removing unwanted coatings or concrete features. Grinding is nearly always a step you do before another process. For example removing old adhesives in order to get down to the surface before installing tile, paint, epoxy or other floor covering or concrete polishing. The purpose of grinding is to get the concrete surface back to it's original condition after pouring and troweling. The grinding process uses relatively coarse  metal bond concrete grinding tools  for grinding, then seals the concrete with a chemical to make it impervious to liquids. It takes less time than a full polish because there are fewer steps. It still gives a smooth finish, but without the high gloss of fully-polished concrete. Concrete Polishing ...

Grinding and polishing concrete is not a easy job. It is quite a bit more complicated if failure to pay attention to some details can easily lead to work errors. A few things need to keep in mind if you want the end concrete surface to come out looking smooth and shiny. Take a look at the two most common grinding and polishing mistakes, so that you know what to look out for when on the job. Using the wrong bond for the concrete One of the biggest considerations to make when grinding concrete is which type of bond your diamond tooling needs to have based on the type of concrete you will be grinding. Diamonds are set into a matrix that gets worn down to expose more diamonds the longer you grind. The hardness of the concrete will be the deciding factor of what tool to use because of how the bonds interact with concrete. The general rule of thumb is that very hard concrete requires a softer bond. Conversely, softer concrete requires a much harder bond. If you choose the wrong type of bond ...