Non-excavation polymer micro-expansion grouting material for port and wharf ground subsidence
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Polymer cement grout is a cement-based grouting material primarily modified with high-strength cement, polycarboxylate superplasticizers, and multi-mineral materials. It features excellent fluidity, micro-expansion, certain toughness, strong bonding with concrete, and corrosion resistance with durability. It is suitable for grouting repairs of concrete structure cracks wider than 3mm and for external steel reinforcement.1 Performance Indicators of Polymer Cement Grout
| No. | Test Item | Performance Indicator | |
| 1 | Vertical Expansion Rate (%) | 3h | ≥0.10 |
| Difference between 4h and 3h | ≥0.020 | ||
| 2 | Fluidity (mm) | Initial Value | ≥380 |
| 30min Retention Value (%) | ≥90 | ||
| 3 | Compressive Strength (MPa) | 3d | ≥25 |
| 7d | ≥35 | ||
| 28d | ≥55 | ||
| 4 | Flexural Strength (MPa) | 7d | ≥5 |
| 28d | ≥8 | ||
| 5 | Splitting Tensile Strength (MPa) | 7d | ≥3 |
| 28d | ≥4 | ||
| 6 | Bleeding Rate (%) | 0 | |
| 7 | Normal Bond Strength with Concrete (MPa) | 28d | ≥1.5, and cohesive failure in concrete |
| Industry Category: | Chemicals/Polymers/Other Polymers |
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