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Understanding Polished Concrete: Levels, Diamond Abrasives, and Protection Tips

This guide covers the intricacies of polished concrete, discussing its various levels—from flat ground to highly polished finishes. It emphasizes the importance of protective measures against stains and advises caution when using samples, as the final appearance can differ. The role of diamond abrasives in achieving desired finishes is explained, detailing their classifications from coarse to fine for varying concrete hardness. Key aspects, such as maximum refinement and resistance to abrasion, ensure a smooth and durable surface.

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Understanding Polished Concrete: Levels, Diamond Abrasives, and Protection Tips

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  1. Level 1 – Flat [Ground]

  2. Level 2 – Satin [Honed]

  3. Level 3 – Semi-Polished

  4. Level 4 – Highly Polished

  5. Additional Protection • If floor will have potential to be stained, then a stain guard can be applied

  6. Protection After Completion Participants should understand polished concrete must be protected

  7. A Special Note About Samples

  8. Be Careful, Be Very Careful • Use of samples can be problematic • Polished concrete is similar to wood and stone – will have a natural finish that cannot be predicted by a sample

  9. Diamond Abrasives and Full/Maximum Refinement

  10. Diamond Abrasives • Most significant tool • Many forms, shapes and sizes • Industrial grade • diamonds set in • metal or resin bondings of varying grits

  11. Diamond Abrasives • Categorized as: • - Coarse • - Medium • - Fine • For concrete that is: • - Soft • - Medium • - Hard

  12. Diamond Abrasives • Levels of abrasion: • - Grinding: 100 grit metals; 50 grit resins • - Honing: 100, 200, and 400 grit resins • - Polishing: 800 grit and above resins

  13. How Diamond Abrasives Work • Abrasives cut peaks and valleys in concrete • Higher the grit, peaks and valleys are smaller • Each grit removes peaks and valleys of previous grit and can fully refine its own peaks and valleys

  14. Most Important Aspect • Have to achieve full/maximum refinement for each bonded abrasive grit • Abrasive no longer cuts (or cuts very little) under its current weight • More refinement means more resistance to abrasion

  15. Most Important Aspect • Full/maximum refinement achieved when surface is smooth (no peaks or valleys) and light is reflected in a perfectly organized manner

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