A rapid-setting anti-washout cementitious injection grout for underwater or water-bearing void filling, sealing and structural reinforcement.
Stable slurry with good flow and pumpability
No bleeding after 24 hours and controlled vertical expansion
Rapid setting for emergency repair and tunnel waterproofing
Suitable for wet underground voids, settlement repair and pre-excavation sealing
Product Introduction
CGM Underwater Anti-Washout Injection Grout is a cementitious injection grout designed for underwater or water-bearing repair zones where ordinary grout may disperse or lose strength. It is intended for tunnel waterproofing, emergency sealing, underground void filling and reinforcement in damp or submerged environments.
The grout is formulated to maintain stable flow, controlled setting and low washout risk during pumping and placement. Its no-bleeding behavior and positive expansion help build a denser grout body behind the structure, reducing water-bearing cavities and improving contact with the surrounding ground or repair interface.
Typical use scenarios include tunnel and underground rock mass waterproof injection, road, bridge and airport foundation settlement repair, and pre-excavation curtain grouting or wall protection where water ingress and loose voids are both concerns.
Product Parameters
| Parameter | Value |
|---|---|
| Product Type | Rapid-setting anti-washout cementitious injection grout |
| Water-to-Binder Ratio | 0.33 |
| Initial Setting Time | ≤ 30 min |
| Final Setting Time | ≤ 90 min |
| Initial Flow Time (25°C) | ≤ 35 s |
| Free Bleeding Rate (24 h) | 0 |
| Vertical Expansion Rate (24 h) | ≥ 0.1% |
| Compressive Strength, 1 day | ≥ 15 MPa |
| Compressive Strength, 28 days | ≥ 40 MPa |
| Packaging | 40 kg/bag |
| Shelf Life | 6 months |
| Reference Standards | CECS 370:2014; GB/T 50448-2015 |
Product Usage
Tunnel and underground rock mass waterproof injection grouting
Emergency repair and reinforcement in water-bearing voids
Foundation settlement repair under roads, bridges and airport pavements
Pre-excavation grouting for wall protection, seepage control and void reduction
Combined use with acrylic or PU injection routes where staged grouting is required
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Our products have undergone rigorous testing at our national testing laboratory (CABR testing center co., ltd). Renowned Fortune Global 500 firms such as China Railway Group Limited, China Communications Construction Company Limited, and Sinohydro are among our esteemed clients.
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