Le 24 mars 2016, 06:43 dans Humeurs • 0
Two more essential resin diamond hand pads steps:
1. Hardening the surface
Polished concrete floors usually have the surface hardened with a chemical before the second, third or fourth grinding pass. The chemical soaks into the floor to a few millimeters (up to half an inch) and causes a chemical reaction to take place that makes the floor harder and easier to polish to a high finish. These floors are very strong and durable without having a surface coating.
2. Filling holes
After the first porcelain blades concrete grinder pass removes the top layer of concrete paste it will expose millions of tiny air holes. If these are not filled before the hardening process then the final polished concrete floor will show these unsightly imperfections. The holes are usually filled with an acrylic tile adhesive type of product mixed with either the grinding dust or cement powder which is hand scraped across the floor using a trowel. The preferred way to fill the holes is to spray the acrylic adhesive ahead of the grinder so that the diamonds mix it into the holes with the grinding dust on the third or fourth pass at around 120 grit. This method is faster and the dust matches the color of the floor to hide the holes better than when using cement powder.