Tunnel Vault Grouting Material

Specialized grouting material for tunnel construction, designed for void filling, reinforcement, waterproofing and settlement control with excellent flowability and micro-expansion performance.

β‰₯25 MPa
Compressive (1d)
β‰₯60 MPa
Compressive (28d)
β‰₯300 mm
Initial Flowability

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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Tunnel Vault Grouting Material

Product Overview

Tunnel Vault Grouting Material is a specially formulated cement-based grouting material developed for tunnel construction and underground engineering. It provides excellent pumpability, self-flowing ability and micro-expansion performance to effectively fill tunnel vault voids, reinforce surrounding rock and improve waterproofing performance.

Product Features

Fast Strength Development
1d compressive strength β‰₯25MPa, 3d β‰₯40MPa, 28d β‰₯60MPa, quickly meeting tunnel support load-bearing requirements.
Excellent Flowability
Initial flowability β‰₯300mm, 30min β‰₯280mm, good pumpability suitable for high-pressure grouting equipment.
Micro-Expansion Performance
28d vertical expansion rate 0.02%-0.1%, compensating for shrinkage and ensuring dense vault filling without voids.
Controllable Setting Time
Initial setting β‰₯45min, final setting ≀12h, providing ample working time and adapting to long-distance tunnel pumping requirements.
Self-Compacting Performance
High fluidity allows the material to autonomously fill complex spaces, achieving complete contact without vibration.
Excellent Waterproofing & Seepage Control
Dense filling layer effectively improves tunnel lining waterproofing performance and prevents groundwater seepage.

Technical Specifications

ParameterValueTest StandardTest ResultStatus
Compressive Strength (1d)β‰₯25 MPaGB/T 50448‑201528MPa Pass
Compressive Strength (3d)β‰₯40 MPaGB/T 50448‑201545MPa Pass
Compressive Strength (28d)β‰₯60 MPaGB/T 50448‑201566MPa Pass
FlowabilityInitial β‰₯300 mm / 30min β‰₯280 mmGB/T 50448‑2015Initial 330mm / 30min 295mm Pass
Vertical Expansion Rate (28d)0.02%–0.1%GB/T 50448‑20150.07% Pass
Initial Setting Timeβ‰₯45 minGB/T 50448‑201560min Pass
Final Setting Time≀12 hGB/T 50448‑20159h 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

Tunnel Vault Void Filling

Injected through high-pressure equipment to fill gaps behind tunnel linings and form a dense filling layer.

2

Surrounding Rock Reinforcement

Improves the stability of loose surrounding rock and underground structures.

3

Waterproofing and Anti-Seepage

Used for tunnel sealing, leakage prevention and underground water control.

Click the play button to start the video

Usage Guidelines

β€’

Water-to-powder ratio: Follow manufacturer's specified mixing ratio

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Working time: Use within 30 minutes after mixing

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Curing: Maintain moisture after final set for optimal strength

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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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