HORMIGÓN DURO DOBLE SEGMENTO AZUL 30S

- Aggressive metal-bond grinding segment for early grinding steps — the 30-grit cutting surface opens up the concrete, removes coatings, exposes medium-to-large aggregate, and creates the profile needed for subsequent grinding and polishing. Per industry guidance, 30 grit is the recommended starting point when exposing medium-to-large stone aggregate, sitting between the most aggressive prep (16 grit) and the standard mid-cut (40–50 grit).

- Double-segment configuration for tool life and refinement — two diamond segments per shoe create more surface contact than a single segment, extending tool life and leaving a more uniform scratch pattern. Best paired with larger / heavier walk-behind grinders (25" and up) where the extra contact patch helps the machine pull weight. The smoother cut from a double segment also reduces the work needed at the next grit step.

- Engineered for hard concrete — hard concrete (typically 5,000+ PSI, Mohs 7+) doesn't wear diamonds down enough to keep them sharp, causing the segment to "glaze" and slide across the surface without cutting. The soft metal bond (the "S" in 30S) wears away faster on purpose, continuously exposing fresh diamond and keeping the cut aggressive.

- Counterintuitive but correct: soft bond on hard concrete, hard bond on soft concrete — using the wrong bond on a hard slab causes glazing, where the diamonds polish smooth and stop cutting entirely. If you see glazing on the job, switching to this softer bond (or reducing machine weight, slowing RPM, or adding water mist) reopens the diamonds and restores the cut. The blue color code is the universal industry marker for soft-bond hard-concrete tooling.

- Common starting grit for aggregate-exposed finishes on hard concrete — per industry guidance, 30 grit is the recommended first step when the goal is exposing medium-to-large stone aggregate (rather than the salt-and-pepper finish that starts at 70–120 grit). After this 30-grit pass, the typical sequence steps up through 50, 80, and 100-grit metals, then into transitional and resin polishing pads. A clean cut at 30 grit on the right bond is what makes every step afterward faster — leave scratches here and you chase them all the way to the final pad.