Grinding concrete is the first stage of the concrete polishing process. Grinding removes minor height variations and imperfections, creating a flat surface which can be polished. Husqvarna diamond grinding segments are manufactured to do precisely this. The deeper the grinding needs to be, the longer it will take. It produces a great deal of dust and debris as the machine grinds deeper into the floor. If you do not follow a plan, grinding can be difficult. Diamond grinding segments need to be much more aggressive in their removal than polishing pads, and this can lead to scratches if the grind continues for too long.
The first step should be performed on a site visit, before the process arrives. The concrete hardness needs to be ascertained. A MoHS scratch test can be carried out to test the hardness, but some contractors prefer less formal methods. Either way, it is important to know how hard the floor is so the correct hardness diamond segments can be selected.
The next step is to estimate how many segments you will need to complete the grind. It can be challenging to calculate the exact amount as each slab is made up of a unique mix. It is better to have more than you need, rather than less. Unused segments can always be kept for another project.
It is also important that there are enough of each grit rating. How many stages of grit are needed will depend upon the finish that must be achieved to start polishing. Establishing this in advance leads to less confusion on site and a smoother process.
Some contractors will have diamond segments which have been partially used on a previous project. While these are fine to use, it is important to make sure that all the segments have the same height of diamond remaining. Using mismatched segments can disrupt the grinding pattern.