1) How big is your project, and how much time do you have to complete it?
This will determine the size of the grinder and vacuum needed, as well as how much tooling will be required. For example, a grinder with about 20 inch working dimension is appropriate for small residential projects, like garages or patios, whereas larger commercial projects will require a larger, more powerful machine , you need larger machine with about 30 inch working dimension.
2) How old is the concrete?
Freshly poured concrete floors require at least 28 days to cure. Conversely, older concrete should be inspected for pits and cracks, which may be treated by a product such as Quick Mender®.
3) What condition is the concrete in?
The condition of the concrete will determine the initial grinding steps needed to prepare the floor for polishing which include coatings or epoxy removal, etc. If the floor is in optimal shape, you could start with 120 grit metals, but if the floor is uneven and blemished, you should begin with a coarser grit, such as 30.
4) How much aggregate would you like to expose?
If you want to show aggregate, you must grind the concrete more aggressively (longer and deeper) than if you simply want to polish only the cream.
5) How hard is the concrete?
Typically concrete under 2500 psi is considered soft, between 2500-4000 psi - medium, 4000-5500 psi - hard, and above 5500 psi - extra hard.
We recommend testing the concrete hardness of the floor prior to selecting diamond tools. A popular and easy to use tools for testing the concrete hardness is the Moh's pick set (scratch tester).
6) How much shine do you want?
If just a honed finish with less shine is desired, you may stop processing the floor after grit 400. However, a shiny and mirror-like finish will require processing the floor to a much higher grit - typically 3500.
For maximum shine, you can go up to 8500 grit resin, such as Superabrasive's V-Harr BUFF pad.
we have the polishing pads up to grit 10000 ,Buff for your maximum require.
7）Grinding wet or dry?
This will sometimes depend on the job and job site. Most operators prefer the dry process, as it requires less clean up; however, wet grinding is best for some applications. Keep in mind that dry grinding will always require a vacuum for dust removal.
•8）Is your project indoors or outdoors?
This will determine which sealer and dyes are needed. Some guards and sealers are appropriate for indoor applications only. Water- and acetone-based dyes are also for interiors only because they are not UV stable. Others such as ColorJuice™, however, is UV stable and ideal for concrete porches, patios, driveways, sidewalks and pool decks.
Contact us for additional information about your specific job.