Description
Qiandao QD-F120 Offshore Wind Turbine Grouting Material
Qiandao QD-F120 is a high-performance, cementitious grout specifically engineered for offshore wind turbine foundations, delivering ultra-high early strength, zero bleeding, and exceptional durability in harsh marine environments.
Product Overview
Designed to meet the rigorous demands of offshore wind power construction, Qiandao QD-F120 provides superior bonding strength and resistance to saltwater corrosion and chloride penetration. Its advanced non-shrink, high-fluidity formula facilitates easy pumping and placement, ensuring a reliable and durable connection between the steel structure and the seabed foundation. This grout is engineered to enhance construction efficiency and comply with strict international engineering standards.
Key Features & Benefits
- Ultra-High Early Strength: Achieves ≥20 MPa within 24 hours, accelerating project timelines and allowing for rapid load transfer.
- Superior Volume Stability: Prevents shrinkage cracking and ensures consistent load-bearing capacity throughout the operational lifetime of the turbine.
- Zero Bleeding: Maintains a homogeneous mix to prevent segregation and ensure uniform performance, enhancing the grout’s integrity in complex underwater geometries.
- Excellent Flowability: Designed for optimal pumpability and penetration into narrow annuli, ensuring a complete and void-free fill (Initial Fluidity ≥ 290mm).
- Exceptional Durability: Engineered to withstand harsh marine conditions, including saltwater corrosion, chloride ion attack, and wave-induced vibration fatigue.
Technical Specifications
Note: Performance indicators based on standard testing conditions.
| Test Items | Performance Indicators (QD-F120) | |
|---|---|---|
| Fluidity (mm) | Initial | ≥ 290 |
| 30 min | ≥ 260 | |
| Compressive Strength (MPa) | 1 day | ≥ 20 |
| 3 days | ≥ 40 | |
| 28 days | ≥ 60 | |
| Vertical Expansion Rate (%) | 3 hours | 0.1 – 3.5 |
| 24h – 3h | 0.02 – 0.5 | |
| Chloride Ion Content (%) | ≤ 0.1 | |
| Water Bleeding Rate (%) | 0 | |
Applications
Qiandao QD-F120 is the ideal solution for critical load-transferring connections in offshore wind projects, including but not limited to:
- Offshore wind foundation sleeve grouting.
- Monopile and jacket foundation connections.
- Transition piece grouting.
- Subsea structure connections and structural reinforcement.
Frequently Asked Questions (FAQ)
1. What is the recommended mixing procedure for QD-F120?
The grout should be mixed using a high-shear colloidal mixer to ensure a uniform, lump-free consistency. Follow the specified water-to-powder ratio provided in the technical data sheet to achieve the desired fluidity for pumpability.
2. What is the pot life of the mixed grout?
The exact pot life can vary based on ambient temperature, but typically it is designed to allow sufficient working time for offshore pumping operations. It is recommended to maintain an initial fluidity of ≥290mm and a 30-minute fluidity of ≥260mm to ensure a successful pour.
3. How does QD-F120 resist the harsh marine environment?
Its advanced formulation includes a proprietary blend of cements and admixtures that provide low permeability, high resistance to chloride ion penetration (≤0.1%), and excellent volume stability. This prevents the ingress of aggressive sea water and protects the structure from corrosion and fatigue damage over its service life.
4. Is this product suitable for deep-water applications?
Yes. Qiandao QD-F120 is formulated as a pumpable grout with anti-washout properties, making it suitable for subsea applications in various water depths, ensuring structural integrity from the seabed to the transition piece.
