A) Quick Overview
Goal: A thin microcement system (final ≈2–3 mm) that:
- Has a water-resistant final surface (water beads up, low penetration).
- Is dust-resistant (high hardness and density).
- Has high resistance to hairline and movement-related cracking (elasticity and internal reinforcement).
To achieve these three properties, we combine three approaches:
- Internal formula modification (Elastomeric binder + Fibers + SRA) → Crack-resistant.
- Matrix densification (Micronized silica / Microsilica / Colloidal silica) → Reduced porosity → Dust-resistant.
- Post-cure surface treatment (Silane/Siloxane + Densifier + Final sealer) → Water resistance + Long-term dust resistance.
B) Workshop Formula (Dosage for a batch of ~19–20 kg of final powder)
Powder Component (Total ≈ 19.5 kg)
- White cement (or high-quality grey cement) — 10.0 kg
- Micronized silica powder (200–400 mesh) — 5.0 kg
- Soft marble powder (filler) — 3.0 kg
- Microsilica (Silica fume) — 0.5 kg ← For matrix density and hardness.
- Mineral microfiller (fine calcium carbonate) — 0.5 kg (Optional for uniformity).
- Mineral pigment (if color is needed) — 0.1–0.2 kg (≤2% of cement weight).
- Micro polypropylene fibers (crack control) — 10–15 g (Short fibers, non-flammable, 6–12 mm or micro type).
Total powder ≈ 19.1 – 19.2
