Prestressed Duct Grouting Material

High-performance grouting material specially developed for prestressed concrete structures, providing excellent fluidity, stability, impermeability and durability for duct filling applications.

β‰₯50 MPa
Compressive (28d)
10–17 s
Initial Fluidity
0%
Water Bleeding

Packaging & Delivery

Packaging3-ply paper-plastic composite bagSpec.25KG/bagVolume60*40*15cm
MOQ1000KGLead Time1-7 working daysShelf Life6 months (unopened, in dry conditions)
Trade TermsFOB/EXWPaymentT/T / L/CPortShanghai / Ningbo
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Prestressed Duct Grouting Material

Product Overview

Prestressed Duct Grouting Material is a specialized cement-based grouting material designed for filling prestressed concrete ducts. It provides excellent fluidity, controlled setting time, low water bleeding performance and high durability, ensuring effective protection of prestressing steel and improving structural safety.

Product Features

Precise Water-Cement Ratio Control
Water-cement ratio 0.26-0.28, ensuring slurry density and strength development, meeting prestressed duct construction requirements.
Excellent Fluidity Retention
Initial 10-17s, 30min 10-20s, 60min 10-25s, maintaining good fluidity over extended periods.
Zero Water Bleeding
3h water bleeding between steel wires 0%, 24h free water bleeding 0%, stable slurry without segregation.
Low Pressure Bleeding Rate
≀2.0% at 0.22MPa, ≀2.0% at 0.36MPa, excellent water retention under high pressure.
Controlled Expansion Rate
3h free expansion rate 0-2%, 24h 0-3%, compensating for shrinkage and ensuring dense duct filling.
High Compressive Strength
3d β‰₯20MPa, 7d β‰₯40MPa, 28d β‰₯50MPa, meeting load-bearing requirements of prestressed structures.

Technical Specifications

ParameterValueTest StandardTest ResultStatus
Water-Cement Ratio0.26–0.28JTG/T F50-20110.27 Pass
Initial Setting Timeβ‰₯5 hoursJTG/T F50-20116 hours Pass
Final Setting Time≀24 hoursJTG/T F50-201112 hours Pass
Fluidity (25℃)Initial: 10–17 s / 30min: 10–20 s / 60min: 10–25 sJTG/T F50-2011Initial 14s / 30min 16s / 60min 18s Pass
Water Bleeding Rate0% between steel wires after 3 hours; 0% free water after 24 hoursJTG/T F50-20110% Pass
Pressure Bleeding Rate (≀1.8m, 0.22MPa)≀2.0%JTG/T F50-20110.6% Pass
Pressure Bleeding Rate (>1.8m, 0.36MPa)≀2.0%JTG/T F50-20111.1% Pass
Free Expansion Rate3h: 0–2% / 24h: 0–3%JTG/T F50-20113h 0.5% / 24h 1.0% Pass
Compressive Strength3d β‰₯20 MPa / 7d β‰₯40 MPa / 28d β‰₯50 MPaJTG/T F50-20113d 25MPa / 7d 45MPa / 28d 58MPa Pass
Flexural Strength3d β‰₯5 MPa / 7d β‰₯6 MPa / 28d β‰₯10 MPaJTG/T F50-20113d 6MPa / 7d 7.5MPa / 28d 12MPa Pass

Advantages

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50% Higher Construction Efficiency

Self-compacting, freeze-thaw resistant, highly adaptable to environments. No vibration required, continuous pouring possible, reducing labor costs.

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50% Shorter Construction Period

Early strength and high strength, non-shrink with micro-expansion, self-leveling. Compressive strength reaches over 25 MPa in 1 day and 42.5 MPa in 3 days. One-time pouring, simple operation.

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50% Lower Cost

Meets design specifications for key projects with guaranteed acceptance. Maintenance-free, reliable delivery, no worries, and long service life.

Applications & Operation Video

Trusted across diverse construction scenarios

1

Bridge Engineering

Used for prestressed concrete bridge construction and maintenance.

2

Railways and Rail Transit

Applied in prestressed structures for railway and urban rail transit projects.

3

Hydraulic, Hydroelectric and Port Engineering

Suitable for large infrastructure projects requiring high durability.

Click the play button to start the video

Usage Guidelines

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Water-cement ratio: Strictly control at 0.26-0.28

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Mixing time: Minimum 3 minutes of mechanical mixing

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Working time: Maintain fluidity within 60 minutes after mixing

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Construction temperature: Ideally between 5℃~35℃

Storage & Shelf Life

Storage Condition

Store in a dry, ventilated place, protected from moisture.

Shelf Life

6 months (unopened, in dry conditions)

Successful Partnership Case Studies

Northwest Large-Scale Wind-Solar-Storage Integrated Wind Power Base Project

Category: Onshore Wind Turbine Foundation Grouting
Product: Wind Power High-Strength Grouting Material
Quantity: 5,500 tons
Location: Barkol, Xinjiang
Summary: Used for the connection between turbine foundations and tower bases.

East China High-Speed Railway Connection Line Project

Category: High-Speed Railway Bridge Bearing Reinforcement Grouting
Product: Bridge Bearing Special Grouting Material
Quantity: 4,000 tons
Location: Nanjing, Jiangsu
Summary: A key regional high-speed railway project, supplying bearing grouting materials.

Southern Pumped-Storage Power Station Foundation Treatment Project

Category: Hydropower Station Equipment Base Grouting Reinforcement
Product: Underwater Non-Dispersible Grouting Material
Quantity: 3,890 tons
Location: Qingyuan, Guangdong
Summary: A large domestic pumped-storage power station, supplying grouting for unit base equipment.

North China Heavy Industry Park Heavy Equipment Foundation Project

Category: Large Mechanical Equipment Secondary Grouting
Product: Early-Strength High-Strength Grouting Material
Quantity: 4,517 tons
Location: Dagang, Tianjin
Summary: A heavy equipment manufacturing park, supplying grouting for large unit equipment bases.

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