Kuaizhuang® grouting material is tailored for wind power hybrid towers and external prestress anchorage, combining low water demand, non-shrink performance and durability.
Summary Benefits at a Glance
Low water demand – improves density, impermeability and bonding
Stable expansion – no segregation or bleeding during grouting
Fast setting – ensures early strength and short construction cycles
Durability – corrosion resistant, reliable in harsh onshore/offshore environments
Product Introduction
Kuaizhuang® is a high-performance, non-shrink grouting material designed for wind power assembled foundations and hybrid concrete towers, especially suitable for external prestressed duct grouting and tendon anchorage. It features low water demand, high density, excellent impermeability, and controlled expansion. The product is widely applied in expressways, bridges, nuclear power plants and wind turbine tower foundations. It ensures strong bonding with prestressing tendons and ducts, prevents shrinkage and bleeding, and maintains long-term durability under variable temperature and humidity.
Product Parameters
| Test Item | Technical Index | Standard |
|---|---|---|
| Water-cement ratio (%) | ≤ 0.26–0.28 | JTG/T 3650-2020 |
| Initial setting time (h) | ≥ 5 | JTG/T 3650-2020 |
| Final setting time (h) | ≤ 7 | JTG/T 3650-2020 |
| Fluidity (s, initial) | 14–20 | T/CEC 5008-2018 |
| Fluidity (s, 30 min) | 20–25 | T/CEC 5008-2018 |
| Fluidity (s, 60 min) | 25–30 | T/CEC 5008-2018 |
| Bleeding rate (%) | 0 | T/CEC 5008-2018 |
| Pressure bleeding (%) | ≤ 2.0 | T/CEC 5008-2018 |
| Free expansion (%) 3h | 0–2 | GB/T 50080 |
| Free expansion (%) 24h | 0–3 | GB/T 50080 |
| Compressive strength (MPa, 3d) | ≥ 30 | GB/T 17671 |
| Compressive strength (MPa, 7d) | ≥ 35 | GB/T 17671 |
| Compressive strength (MPa, 28d) | ≥ 50 | GB/T 17671 |
| Flexural strength (MPa, 3d) | ≥ 6 | GB/T 17671 |
| Flexural strength (MPa, 7d) | ≥ 8 | GB/T 17671 |
| Flexural strength (MPa, 28d) | ≥ 10 | GB/T 17671 |
| Steel corrosion effect | None | GB/T 50448 |
Product Usage
Wind power hybrid towers – external prestressed duct grouting and tendon anchorage
Prestressed anchorage systems – bonding tendons in large-scale wind turbine foundations
Infrastructure – highways, bridges, nuclear power and heavy civil structures requiring durable non-shrink grout
Application Notes
Mix with clean water according to specified water-cement ratio until uniform slurry is obtained
Grouting should be continuous and completed within the specified time
Provide confinement and venting to avoid air entrapment
Curing is required after grouting to prevent early shrinkage and cracking
Packaging: 25 kg moisture-proof composite bags
Shelf life: 3 months in dry, ventilated storage
Product Documentation
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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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