Tunnel Board
Tunnel Board
This upgraded calcium silicate board features ultra-low density and excellent fire resistance, with a fire rating of more than 2 hours.
Specification (mm): 2440/3000*1220
Thickness (mm): 8/9/10/12/15/24
Density (g/cm3): ≤0.975
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Product Details
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Characteristic
• Anti-Corrosion – Resists exhaust/seepage; channels water to drainage systems
• Fire Safety – Filters corrosive combustion gases, shielding tunnel concrete/steel from damage.
• Moisture Control – No condensation in wet tunnels; absorbs/releases moisture without performance loss.
• Easy Maintenance – No routine upkeep needed; boards can be unscrewed for inspections and reinstalled without compromising functionality.
Physical Properties
| Item | Index |
|---|---|
| Edge Straightness | ≤0.3% |
| Bending Strength (Dry) | ≥6 MPa |
| Bending Strength in Saturated State | ≥4.2 MPa |
| Hygroscopic Deformation Rate | ≤0.20% |
| Anti-halogenation | After 20 hours' test, no water-drop, no moisture regain |
| Smoke Toxicity | ZA1 Security Level（GB/T20285-2006） |
| Non-combustibility | Class A1（GB8624-2006） |
| Water Resistance | 30-Day Test: No cracks, delamination, shedding, swelling, or discoloration |
| Acid Resistance | 15-Day Test: No cracks, delamination, shedding, swelling, or discoloration |
| Alkali Resistance | 15-Day Test: No cracks, delamination, shedding, swelling, or discoloration |
| Humidity Resistance | 30-Day Test: No cracks, delamination, shedding, swelling, or discoloration |
| Frost Resistance | 100 Freeze-Thaw Cycles: No cracking, delamination, or spalling observed |
Product Cases
Product Cases
Application
Certified for use in special spaces with very high fire protection requirements, including:
• Underground tunnels
• Nuclear power facilities
Based on environmentally friendly calcium silicate board as the substrate, it is compounded with a 0.5–0.8 mm galvanized steel plate using precision light-pressing and curing technology. The surface features a multi-layer inorganic coating that delivers exceptional weather resistance and long-lasting color stability.
Specification (mm): 2440*1220
Thickness (mm): 6/8/9/10/12
Density (g/cm3): 1.6
Colors and patterns are customizable based on samples.
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Product Details
Product Details
Characteristic
• Class A1 Fire Rating – Non-combustible, zero harmful emissions
• Decorative Finish – Vibrant colors enhance tunnel aesthetics
• Light Diffusion – Reduces glare and light pollution effectively
• Antistatic & Dustproof – Resists exhaust buildup, easy to clean
• Noise Reduction – Keel frame system lowers noise via thin-wall resonance
• Impact Resistant – No sharp edges when broken, prevents secondary injury
• Moisture Proof – Low water absorption, ideal for humid tunnel environments
• Chemical Resistant – Acid/alkali resistant and washable
• Weather Resistant – Long-lasting, maintains appearance over time
• Eco-Friendly – Environmentally sustainable material
Physical Properties
| Item | Index |
|---|---|
| Moisture Expansion Rate | ≤ 0.25 % |
| Water Absorption Rate | ≤12 % |
| Flexural Strength (Air-Dried) | ≥24 Mpa |
| Flexural Strength (Water-Saturated) | ≥22 Mpa |
| Frost Resistance | Withstands 25 freeze-thaw cycles without cracking, delaminating. or crazing. |
| Impermeable to Water | After 24 hours of testing, no wet marks or water droplets appear on the reverse side |
| Resistance to Corrosion | ≥ 1.5 L/um |
| Gloss Deviation | 10 |
| Coating Adhesion | Grade 0 |
| Wind Resistance Kpa | Positive Wind Pressure P₃≥5.0; Negative Wind Pressure P₃≤-5.0 |
| Coating Solvent Resistance | 200 times, no exposure of the substrate. |
Product Cases
Product Cases
Application
Engineered for side wall installations in:
• Urban underpass tunnels
• Submerged river tunnels
• Submerged lake tunnels
• Mountain borehole tunnels
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