PRODUCTS
PRODUCTS
PRODUCTS
ZJ70 Micro-expanding grouting material for tunnel arch—specifically designed for compensating shrinkage and supporting tunnel arches
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： ZJ70 Micro-expanding grouting material for tunnel arch—specifically designed for compensating shrinkage and supporting tunnel arches
- Description
-
1. Packaging and Logistics: Delivery Date Guarantee
Packaging Three-ply film-composite bag Specifications 25KG/ bag Volume 60*40*15 cm³ Minimum order quantity 1000KG Minimum order quantity Delivery date 1-7 Workday Shelf life Dry and well-ventilated 12 months Transaction method FOB/EXW Payment method Telegraphic Transfer / Letter of Credit Ship goods FOB Shanghai / Ningbo 2. 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.
3. Application Scenarios and Features
Application scenarios Features: 1. Fill the support voids 1. Pumpable 2. Reinforce loose surrounding rock 2. Self-flowing 3. Waterproofing, leak-stopping, and anti-seepage 3. Micro-expansion 4. Control settlement deformation 4. Can retard setting 5. Repair damaged areas 5. Self-compacting 4. Tunnel Construction Scenarios
At the tunnel vault micro-expanding grouting material construction site, the grouting material is uniformly injected into the gap in the vault via 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 excellent filling performance.
5. 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).
6. Functional Features
Five Core Advantages
① High fluidity: It can self-level and fill tiny gaps without the need for vibration.
② Micro-expansive property: 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.
7. Application scenarios
Primarily used for arch void filling, segment joint grouting, and surrounding rock reinforcement in highway tunnels, railway tunnels, subway tunnels, and other similar projects. Particularly suitable for tunnel environments with complex geological conditions and limited construction space.
8. Instructions for Use
Four-step construction process
① Substrate preparation: Remove debris and loose dust from the tunnel vault surface; 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 pressure and from inside to outside, with the pressure maintained between 0.3 and 0.5 MPa.
④ Curing: Within 24 hours after grouting is completed, cover and keep moist. When the ambient temperature falls below 5℃, take thermal insulation measures.
9. Success Stories
10. Reasons to Choose Us
- Our company has a professional technical R&D team that provides free assistance in resolving all technical challenges you may encounter during construction.
- The raw materials used in our company’s products undergo rigorous screening, and we carefully select imported admixtures that are scientifically proportioned. The quality tolerance for the three-stage processing does not exceed one-thousandth, ensuring that their functional characteristics meet the diverse application requirements of our customers.
- High cost performance: Choose our company’s products. You’ll save 50% on labor, 50% on materials, and 50% on time—boosting construction efficiency and delivering significant economic benefits. We’ll ensure the quality of your project, putting your mind at ease and eliminating any future worries.
- Provide third-party type test reports, certificates of conformity, warranty certificates, special invoices, MSDS, and TCIR.
- Qualification Certifications: CCC, CMA, CNAS, ISO9001, CE/FCC; Product Implementation Standard GB/T50448-2015
- We have successful track records in the supply chain for large-scale onshore and offshore wind power projects both domestically and internationally. Quality commitment guaranteed!
Factory Strength
Qualification
Message
Please provide the following valid information, and we will contact you as soon as possible.
Related Products
Tel: +86-510-88260993
WhatsApp: +86-14794604132
Mobile: +86-13179683210
+86-13179683410
Email: chinese@cement-grout.com
Address: A3 Building, Industrial Park, East Port Town, Xishan District, Wuxi City, Jiangsu Province
Copyright © 2025 Wuxi Jianghuai Building Materials Technology Co., Ltd . PRIVACY PROTECTION