Concrete Floor Grinding Process Workflow

Steps

1. 1

   Surface Assessment

   Test concrete hardness using Mohs scratch test or rebound hammer. Record PSI rating. Check for coatings, adhesives, or moisture issues.

   Pro tip: Always test in 3+ spots - hardness can vary across a single slab.

2. 2

   Machine Setup

   Select diamond segments based on concrete hardness: soft bond for hard concrete (5000+ PSI), hard bond for soft concrete (<3000 PSI). Mount segments and verify RPM settings.

   Soft concrete: Hard bond, 400-600 RPM\nMedium: Medium bond, 500-800 RPM\nHard concrete: Soft bond, 600-1000 RPM

3. 3

   Rough Grinding (30-40 grit)

   First pass removes coatings and levels the surface. Overlap passes by 50%. Check for even scratch pattern.

   Pro tip: If segments glaze within first 100 sqft, your bond is too hard for this concrete.

4. 4

   Medium Grinding (60-120 grit)

   Remove scratch marks from rough grinding. Reduce RPM by 10-15%. Vacuum between passes.

5. 5

   Fine Grinding (200+ grit)

   Final passes for desired finish level. Wet grinding optional for polished concrete. Apply densifier between 200 and 400 grit.

6. 6

   Quality Check

   Inspect under raking light for scratch patterns, lippage, or missed spots. Measure gloss with meter if polishing.

   Pro tip: Walk the floor at 3 different angles - scratches only show from certain directions.

Tools Required