Material Composition
| Key Components | Content | Function |
|---|---|---|
| 42.5 White Cement | 35-40% | Rigid matrix |
| Graded Quartz Sand | 45-50% (40-80 mesh) | Anti-shrinkage skeleton |
| Redispersible Powder | 3-4% (EVA) | Flexibility (-15℃ film forming) |
| HPMC | 0.2% (150,000cps) | Water retention |
Performance (JG/T 157-2009 Type P)
| Property | Requirement | Test Data | Standard |
|---|---|---|---|
| Initial drying crack | No crack | Pass | GB/T 1748-2020 |
| Dynamic crack resistance | ≥0.08mm | ≥0.12mm | JG/T 157 Annex A |
| Bond strength | ≥0.4MPa | ≥0.68MPa | JGJ/T 70-2009 |
| Water resistance (96h) | No failure | Pass | GB/T 1733-93 |
| Sandability | Sandable | 120-grit | JC/T 1025-2021 |
Application Protocol
Substrate Prep
Strength ≥1.0MPa, moisture ≤10%
Pre-fill cracks >0.3mm
Mixing
Water ratio: 0.38-0.42 (9.5-10.5L per 25kg)
Mix 5min + rest 3min
Application
Single layer: 3-5mm (max total ≤15mm)
Recoat interval: 4h (25℃/50%RH)
Sanding window: 4-8h after setting
Environmental Limits
Temp range: 5℃~35℃ (low-temp version to -5℃)
Curing: Mist-spray 24h after surface dry
Restrictions
Metal/wood substrates (require specific systems)
Permanent water immersion
