PRODUCTS
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PRODUCTS
ZJ-70 Tunnel Arch Micro-expanding Grouting Material
Main business：Building, infrastructure, industrial, mining, marine engineering, military engineering, expressway, tunnel, bridge, concrete repair, installation of large-scale mechanical equipment, wind power equipment, foundation bolt fixing, etc. High-performance, early-strength, micro-expansion, self-compacting, large-flow leveling, rapid repair cement grouting material
- Commodity name： ZJ-70 Tunnel Arch Micro-expanding Grouting Material
- Description
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Specifications 25 kg/bag Model C70 Packaging material Three sheets, one film Mode of transportation Mother-and-child bag ton bag Shipping timeliness Consult a freight forwarder. Shelf life Six months FOB price US$350 per ton MSDS There is Payment method Wire transfer Storage Absolutely no exposure to rain or moisture. Application scenarios Features: 1. Fill the support voids 1. Pumpable 2. Reinforce loose surrounding rock 2. Self-flowing 3. Waterproof, Leak-Proof, and Anti-Seepage 3. Micro-expansion 4. Control settlement deformation 4. Can retard setting 5. Repair damaged areas 5. Self-compacting Tunnel construction scene
At the tunnel vault micro-expanding grouting material construction site, the grouting material is uniformly injected into the gap at the vault using high-pressure equipment, forming a fully packed filling layer. The bright interior of the tunnel serves as the backdrop, highlighting the material’s fluidity and filling performance.
Product Description
The tunnel vault micro-expansion grouting material is a special non-shrinking grouting material specifically designed for filling voids in tunnel vaults. It features high fluidity, micro-expansion properties, and early high strength, effectively addressing structural safety hazards caused by vault voids.
Technical indicators
The key parameters are presented in table format, including compressive strength (1d ≥ 25 MPa, 3d ≥ 40 MPa, 28d ≥ 60 MPa), expansion rate (28-day vertical expansion rate: 0.02%–0.1%), flowability (initial ≥ 300 mm, 30 min ≥ 280 mm), and setting time (initial setting ≥ 45 min, final setting ≤ 12 h).
Functional Features
Five Core Advantages
① High fluidity: It can self-level and fill tiny gaps without the need for vibration.
② Micro-expansiveness: During the hardening process, it produces moderate expansion to ensure tight adhesion to the substrate.
③ Early strength and high strength: Quickly achieve design strength, shortening the construction period;
④ Waterproof and crack-resistant: Forms a dense structure that prevents water penetration and crack formation;
⑤ Environmentally friendly and non-corrosive: Contains no ingredients harmful to reinforcing steel, enabling green construction.
Application scenarios
Primarily used for arch void filling in highway tunnels, railway tunnels, subway tunnels, and other similar projects; grouting of segment joints; and surrounding rock reinforcement. Particularly suitable for tunnel environments with complex geological conditions and limited construction space.
How to use
Four-Step Construction Process
① Substrate preparation: Remove debris and loose dust from the tunnel vault surface, and moisten the substrate without allowing water to accumulate.
② Mixing the ingredients: Pour water and grouting material into the mixer at a water-to-material ratio of 12%-14%, and mix at low speed for 3-5 minutes until thoroughly homogeneous and free of lumps.
③ Grouting construction: Use a high-pressure grouting pump to perform grouting sequentially from low to high and from inside to outside, maintaining the pressure within the range of 0.3–0.5 MPa.
④ Curing: Within 24 hours after grouting is completed, cover and keep moist. When the ambient temperature falls below 5℃, take measures to maintain warmth.
Storage and transportation
The product should be stored in a dry, well-ventilated warehouse, away from sources of ignition and water. When the packaging remains intact, the shelf life is 6 months. During transportation, avoid exposure to moisture, rain, and severe impacts. After opening, any unused portion of the product must have its bag tightly sealed and used up as soon as possible.
Factory Strength
Qualification
Message
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