Grouting is a method of injecting chemical grouting materials into concrete cracks using high mechanical pressure. Through processes such as dispersion, emulsification, expansion, and consolidation, the grouting fills all the cracks in the concrete, compl
Product Features
1. Very low viscosity, suitable for filling and repairing small gaps;
2. Long working time, providing over 1 hour of working time even in summer (>35℃);
3. High strength and low shrinkage after curing, with good balance between strength and toughness; suitable for joints or cracks;
4. Strong adhesion to concrete and can be applied under moist and humid conditions. For humid interface environments, moisture-type interface grouting materials can be used according to the environment, bonding integrally with the base layer and solving the problem of delamination at the interface of conventional materials;
5. The mixing ratio can be from 3:1 to 5:1 according to actual application needs, offering high application tolerance;
6. It has a mild odor, low irritation, is solvent-free, and does not contain heavy metal ions harmful to water quality, thus not damaging the water.
Product Uses
Main Functions
① Improve the integrity and homogeneity of the rock mass;
② Improve the compressive strength and elastic modulus of the rock mass;
③ Reduce rock mass deformation and uneven settlement.
Applications in Different Dam Types
Concrete Heavy Dams: Full-area consolidation grouting of the dam foundation;
Concrete Arch Dams or Heavy Arch Dams: Consolidation grouting of the rock mass at the abutment arch seat under heavy load;
Water Tunnels: Consolidation grouting of the rock mass after lining;
Tunnel Excavation in Fractured Rock Layers: Pre-consolidation grouting of inclined or horizontal boreholes within a certain range before excavation;
Water Dam Cutoff Walls: Consolidation grouting of the rock mass below the bottom concrete cushion layer.
Technical indicators
Table 1 Comparison of Grout Properties with Indicators in JC/T 1041-2007 "Epoxy Resin Grouting Materials for Concrete Cracks"
| Serial Number | project | unit | JC/T 1041-2007 Requirements | Wanhua Products | GD Products | PK Products |
| 1 | Slurry density | g/cm3 | > 1 (L-type / Low viscosity type) | 1 (N type / standard type) | 1.10±0.05 (N type / ordinary type) | 1.05±0.05 (N type / ordinary type) |
| > 1 (N type / standard type) | ||||||
| 2 | Initial viscosity | mPa·s | < 30 (L-type / Low viscosity type) | 70-150 | ≤ 100 | 10 ～ 15 |
| < 200 (N type / standard type) | (23∘C-63#-150r) | |||||
| 3 | Operable time | min | > 30 (L-type / Low viscosity type) | 60 | / | 5 ～ 40h |
| > 30 (N type / standard type) | (23∘C-500g glue) |
Table 2 Comparison of cured product properties with those specified in JC/T 1041-2007 "Epoxy Resin Grouting Materials for Concrete Cracks"
| Serial Number | project | JC/T 1041-2007 Requirements | Wanhua Products | GD Products | PK Products | |
| 1 | Compressive strength / MPa | ≥ | I:40 | 125 | ≥80 | 70~100 |
| II:70 | ||||||
| 2 | Tensile shear strength / MPa | ≥ | I:5 | 15.5 | ≥8.0 | 8~18 |
| II:8 | ||||||
| 3 | Tensile strength / MPa | ≥ | I:10 | 25.5 | ≥30 | 20~35 |
| II:15 | ||||||
| 4 | Bond strength | Dry bonding / MPa ≥ | I:3 | 7.8 | ≥4.0 | ≥4.5 |
| II:4 | ||||||
| Wet bonding / MPa ≥ | I:2 | 7.5 | / | ≥4.0 | ||
| II:2.5 | ||||||
| 5 | Anti-seepage pressure / MPa | ≥ | I:1 | Meets requirements | / | ≥1.2 |
| II:1.2 | ||||||
| 6 | Osmotic pressure ratio /% | ≥ | I:300 | Meets requirements | / | ≥400 |
| II:400 |
a. Wet bond strength: Must be tested under humid conditions.
Note: The curing period for testing cured product properties is 28 days.
Performance testing
Performance evaluation of water-bonded adhesives after curing under humid conditions
Table 3 Test Results
| Application conditions | Bond strength / MPa | Type of destruction |
| Dry concrete surface sizing | 7.8 | Concrete damage |
| Apply adhesive to concrete surface in the presence of water. | 7.2 | Concrete damage |
Note: For concrete with high bonding strength, applying adhesive regardless of the presence of water will not affect the curing process or the building of strength.
Case
Chonghuer Power Station
Xiamen Pumped Storage
