CBGM-5 is engineered as a low-density, buoyant grout for suction bucket foundations, ensuring stable installation in offshore wind farms.
Summary Benefits at a Glance:
Low Density – bulk density 680–750 kg/m³, reducing grout weight
High Buoyancy – improves suction efficiency and uplift stability
Long Flow Retention – initial fluidity ≥ 290 mm, ≥ 150 mm after 8 h, ensuring continuous placement
Volume Stability – 24 h free shrinkage = 0, reliable under marine and tidal conditions
Product Introduction
CBGM-5 is a non-shrink grouting material specially developed for offshore wind suction bucket foundations. Unlike conventional high-density grouts, CBGM-5 emphasizes low bulk density and buoyancy, making it particularly suitable for suction-assisted installation. It maintains excellent fluidity and flow retention for long-duration pours, even under tidal influence. The product delivers stable volume change, impermeability and resistance to marine conditions, ensuring safety and long service life of offshore wind foundations.
Product Parameters
| Test Item | Technical Index | Test Standard |
|---|---|---|
| Appearance | Gray powder | Visual |
| Bulk density (kg/m³) | 680–750 | GB/T 5486 |
| Apparent density (kg/m³) | 1300–1500 | GB/T 50080 |
| Initial fluidity (mm) | ≥ 290 | GB/T 50448 |
| Retained fluidity 30 min (mm) | ≥ 260 | GB/T 50448 |
| Retained fluidity 60 min (mm) | ≥ 230 | GB/T 50448 |
| Retained fluidity 240 min (mm) | ≥ 200 | GB/T 50448 |
| Retained fluidity 480 min (mm) | ≥ 150 | GB/T 50448 |
| Bleeding rate (%) | 0 | GB/T 50448 |
| 24 h free shrinkage (%) | 0 | GB/T 50080 |
| 7 d compressive strength (MPa) | ≥ 0.2 | GB/T 17671 |
| 28 d compressive strength (MPa) | ≥ 0.5–5 | GB/T 17671 |
Product Usage
Suction Bucket Foundations – specialized grout for suction-assisted offshore wind turbine installation
Marine Engineering – grouting under tidal and underwater conditions requiring buoyancy and stability
Offshore Wind Foundations – anchoring systems needing low-density, non-shrink grout
Application Notes
Mix with clean water per recommended ratio; stir until uniform
Place within 10 minutes after mixing; grout continuously from one side to avoid air entrapment
Protect freshly placed grout; keep moist for at least 7 days
Packaging: 25 kg moisture-proof bags
Shelf life: 6 months in dry, ventilated storage
Product Documentation
CBGM-5 – Low Density Non-Shrink Grouting Material for Suction Bucket Foundations
CBGM-5 Suction Bucket Grout | Low Density Non-Shrink Offshore Wind Foundation Material
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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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