The tunnel space is enclosed and the structure is complex. In the event of a fire, high temperatures and thick smoke pose a significant threat to the safety of personnel and the stability of the structure. Under such circumstances, choosing reliable passive fireproof materials becomes a crucial aspect in the safety design of tunnels. Calcium silicate boards, due to their outstanding high-temperature resistance and structural stability, are gradually becoming the core material in tunnel fire protection systems. As a professional manufacturer, New Element's calcium silicate boards provide stable and reliable protection solutions for various tunnel projects.
The Role of Passive Fire Protection in Tunnel Safety
In the tunnel fire protection system, fire protection is usually composed of both active fire protection and passive fire protection. The active fire protection system includes fire detection, sprinkler systems, ventilation, and smoke exhaust facilities. The passive fire protection system uses fire-resistant materials and structural designs to delay the spread of fire and reduce the damage to the structure caused by high temperatures, thereby providing valuable time for personnel evacuation and fire rescue.
In actual engineering, passive fire protection is often the first line of defense for tunnel safety. Tunnel fires typically have the characteristics of rapid temperature rise and long duration. In some extreme cases, the temperature can exceed 1000℃ within a short period of time. If there is a lack of high-performance fire-resistant materials, the top and side wall structures of the tunnel are prone to instability and even collapse due to high temperatures, leading to serious secondary disasters.
For this reason, tunnel projects have set even higher requirements for fireproof materials. They not only need to be non-combustible but also must maintain structural integrity and dimensional stability under high temperatures. Calcium silicate boards, as a mature type of fireproof material, play an irreplaceable role in passive fire protection systems.

calcium silicate boards for tunnel protection systems
Calcium Silicate Boards Are Good for Tunnel Protection
Among various fireproof materials, calcium silicate boards can be chosen as the preferred material for tunnel protection systems because of their outstanding comprehensive performance.
1. Outstanding High Temperature Resistance
The requirements for the material's temperature resistance in tunnel fires are extremely strict. The calcium silicate boards from New Element have been specially formulated and processed through high-temperature techniques, capable of withstanding extreme temperatures up to 1200℃. And they can stand 2-4 hours fire rated time, the calcium silicate fire board can effectively prevent heat transfer and prevent high temperatures from directly affecting the main structure of the tunnel during a fire, making it particularly suitable for high-risk areas such as the top and side walls of the tunnel.
2. Low Thermal Conductivity for Structural Protection
In addition to the high-temperature resistance, the thermal conductivity of the material also affects the fire protection effect of the tunnel. The calcium silicate boards of New Element have a low thermal conductivity property, which can significantly reduce the speed of heat diffusion within the structure. As a protective layer, the calcium silicate fire board can effectively weaken the thermal shock endured by the tunnel concrete or steel structure.
3. Stable Dimension Under Extreme Conditions
The tunnel environment is usually accompanied by temperature variations, humidity fluctuations, and structural stresses caused by long-term use. These factors impose higher requirements on the dimensional stability of materials.
The calcium silicate boards produced by New Element are manufactured using advanced production techniques. They can maintain a stable shape and size even under high temperatures, high humidity, or rapid temperature changes, which helps enhance the reliability of the overall fire protection system of the tunnel.
4. Durable and Mothproof for Long-Term Tunnel Use
Tunnel construction places extremely high demands on the durability of materials. Calcium silicate boards exhibit outstanding resistance to impact and wear, and also possess insect and moth repellent properties. They can maintain stable performance even in complex underground environments for an extended period.
For long-term running tunnel projects, choosing durable and reliable calcium silicate fire boards can help reduce maintenance frequency and operational costs, thereby enhancing the overall economic and safety performance of the project.

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Choosing Reliable Calcium Silicate Fire Boards for Tunnel Projects
Although there are various types of fireproof boards available in the market, not all calcium silicate boards are suitable for tunnel protection systems. Scientific selection is an important step in ensuring tunnel safety.
1. Match Board Thickness with Protection Requirements
The requirements for fire resistance performance vary in different areas of the tunnel, so the selection of board thickness is particularly crucial. New Element offers various thickness specifications of calcium silicate boards, including 9mm, 10mm, 12mm, 15mm, 24mm, and 27.5mm, which can meet different fire resistance levels and structural protection needs.
2. Focus on Certified Performance
In tunnel engineering, fireproof materials must have clear technical parameters and reliable performance support. The calcium silicate fire board of New Element undergoes strict quality control during production and is optimized for performance in high-temperature and complex environments. It provides stable technical support for tunnel projects.
3. Long-Term Maintenance and Lifecycle Cost
As a long-term operational infrastructure, the selection of materials for tunnels should not only focus on the initial cost, but also pay more attention to the performance throughout the entire life cycle. High durability calcium silicate boards can effectively reduce the frequency of later maintenance and minimize potential safety hazards caused by material aging or damage.

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Conclusion
New Element focuses on the research and production of high-quality calcium silicate boards, providing various specifications and customizable fire protection solutions for tunnel engineering.
If you are looking for reliable calcium silicate fire boards suitable for tunnel protection systems, you can contact us at [email protected] to obtain professional product suggestions and technical support.