If you are familiar with sanding, you can easily relate to the concept of polishing concrete. The principle is related but in this case, concrete polishing should be practiced by knowledgeable individuals. It requires the use of complex tools and pieces of the machine that require training. You need to understand how to work with a high-performance polisher or grinder. This machine is equipped with a fine grain of diamond protruding discs, the surface of which is slowly and smoothed to the desired size. You can get to achieve the shine and softness you want. If you don’t want to invest in such a floor renovation project you need to talk to a professional service provider.
You will need to spend time trimming the floors with a concrete grinder to achieve a flat and smooth surface. The surface you would like to achieve relies heavily on what you want since you could go for flat ground or full exposure like terrazzo. A professional is required since the process requires adept and stealth skills to achieve a quality concrete flooring layout work.
If you are working on a new floor, wait until it has dried. Then you can assess the current status. If you are working with an old floor, try to determine whether there are defects or cracks to be filled or whether there are joints and coatings. These items must be removed before sanding. Concrete floors are usually sanded three to eight times before they can be considered polished concrete. When sanding, start with the thickest resin cushions (approx. 30 or 70) and then go up. When sanding, be sure to wear protective devices such as dust masks, earplugs and safety glasses to protect yourself from dangerous materials. Also wear shoes to protect your feet and prevent them from slipping.
You can use the following procedure and steps to polish your concrete.
Remove the flooring
If there is a coating on the floor, the abrasive must be used to remove it. You should start with the coarse grain to smooth the floor, and then work your way down to the finer grain. In addition to removing the coating, the grain also makes the surface smooth..
If the floor shows cracks or unevenness, it must be filled with epoxy cement. If you don’t get concrete epoxy, you should consult a flooring professional who will recommend any other effective plaster that you can use. After the first round of concrete grinding removes the top layer of the concrete mix, millions of small air holes are exposed. If the final polished concrete floor is not filled before the curing process, it will have these uncomfortable flaws. The holes are usually filled with an acrylic tile adhesive mixed with abrasive powder or cement powder and scraped off the floor by hand with a spatula. The preferred way to fill the holes is to spray the acrylic glue in front of the mill so that the diamonds mix it into the holes with the abrasive powder in the third or fourth step with a grain size of about 120. This method is faster and convenient. The powder adapts to the color of the floor to better hide holes compared to using cement powder.
Grind the floor
After filling in all cracks and bumps, you need to start smoothing the floor. You have to grind from a corner and cross the entire floor. For best results, use a 30 grit metal binder first and then continue with an 80 grit. You should complete the grinding process with a grit of 150.
Apply a hardener
After the floor is completely sanded, a chemical hardener for concrete should be applied to get a shiny appearance. Then you need to polish the floor with a diamond abrasive glued to 100 grit resin and proceed with 400 grit resin glue. Therefore, you need to use 800-grain resin to get the desired shine. With polished concrete floors, the surface generally hardens with a chemical before the second, third or fourth sanding pass. The chemical gets into the floor up to a few millimeters and triggers a chemical reaction that makes the floor harder and easier to polish. These floors are very solid and resistant with no surface coating.