Yes — wait the required cure (about 7 days per 25 mm thickness), then lightly grind with 60/120 grit in shallow passes. Do not use heavy 30-grit or PCD on a fresh slab.
You can grind a new slab to remove trowel marks, but wait for proper cure — typically 7 days per 25 mm of slab thickness before light grinding. Use 60/120 grit, take shallow passes, and do not aim for aggregate exposure.
Fresh concrete is still hydrating. Grinding too early pulls paste out, creates dust, and glazes diamonds. After the minimum cure, light grinding removes the thin laitance layer and trowel swirl marks without deep-cutting into the slab.
A medium-bond double-S disc in 60/120 gives a smooth, uniform result without aggressive stock removal. Follow up with a single 200-grit hybrid or resin pass if you are sealing or staining. A triple-round segment disc spreads pressure evenly and avoids the patchy look common when one segment digs in.
A: Only when the slab is already smooth and you are refining. On rough or ground-new concrete, skipping leaves a scratch pattern finer pads cannot resolve.
A: If segments glaze and stop cutting, the bond is too hard; if they wear flat in under half a set, it is too soft. Match bond to concrete hardness.
A: Dry grinding with a HEPA vacuum is standard on polished concrete jobs; wet grinding is mostly used for stone and edge work to control dust and heat.
A: Change the whole set together once segment height drops by half or the cut rate slows. Mixing new and worn plates causes uneven scratch patterns.
Choosing the right bond, grit and technique for your concrete job saves tooling cost and avoids rework. Match the tool to the slab, work in the correct grit sequence, and keep plates balanced — the floor will tell you when you are ready for the next step. Contact JOY TECH for tooling recommendations matched to your machine and concrete hardness.
