How to construct tunnel insulation material rock wool board with a density thickness of 50mm
Release Time: 2026-09-24
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The 50mm thick rock wool board used for tunnel insulation is one of the most widely used insulation material specifications in tunnel engineering. The density selection of rock wool board directly affects its insulation effect, compressive strength, and construction performance. 50mm thick rock wool board is the preferred material for fire insulation, cable trench cover insulation, and specific area insulation. Due to the special environment of tunnels (enclosed space, high fire risk, and complex ventilation), there are strict requirements for the fire rating and density of insulation materials (affecting strength and sound insulation). The core advantages of tunnel insulation material rock wool board are:
1. A-level non flammability (most critical)
2. Excellent sound absorption and noise reduction
3. Hydrophobicity and stability
4. Dimensional stability
5. Excellent fire safety performance
Key points of rock wool board tunnel construction:
1. Base treatment: Remove floating ash and oil stains from the lining surface, ensuring a bonding area of ≥ 40%
2. Wrong seam pasting: The boards should be arranged in a staggered manner, with vertical seams staggered by more than 1/2 of the board length to reduce thermal bridging effects
3. Anchor reinforcement: Add 4-6 anchor bolts per square meter to ensure seismic and wind pressure resistance performance
4. Joint treatment: Fill the board joints with rock wool strips and apply sealing tape to prevent air convection
5. Construction of protective layer: timely apply plastering layer or decorative board to avoid exposure and damage of rock wool during construction
6. Detail processing: Special sealing and insulation treatment should be carried out around through wall pipes, lighting facilities, etc
How to construct tunnel insulation material rock wool board with a density thickness of 50mm? For tunnel engineering, 50mm thick rock wool board with a density of 140-160kg/m ³ is an ideal choice that balances fire safety (Class A), structural strength, and sound absorption and noise reduction. It is mainly used for fire isolation belts and cable protection. Rosewool Insulation Refractory Co.,Ltd. emphasizes that mechanical anchoring and joint tightness must be ensured during construction, and waterproof and moisture-proof measures must be taken to ensure safety and reliability throughout the entire life cycle of the tunnel.
