Steel-calcium board is a type of tunnel fireproof decorative board that can be customized and purchased in bulk. Currently, there are multiple manufacturers on the market offering both ready-to-ship and customized services. It is primarily composed of a composite of calcium silicate board and metal steel plate, specifically designed for use in places where high fire resistance and durability are required, such as subway and highway tunnels. ‌‌‌

Material of steel-calcium board: Core substrate: It is made of non-asbestos calcium silicate board or fiber-reinforced cement board, with a density typically above 1.2g/cm³, ensuring the board is rigid and stable.

Surface layer: The outer surface is made of aluminum-zinc-coated steel, typically ranging from 0.4mm to 0.6mm in thickness. The surface is also coated with fluorocarbon paint or inorganic coating, making it both visually appealing and resistant to stains.

Back treatment: The back of the board will be coated with a layer of aluminum-coated film or moisture-resistant calcium silicate board to prevent moisture from penetrating in, making the board more durable.

Connecting accessories: The board edges are usually clamped with stainless steel mounting fasteners, which facilitate direct hanging installation without the need to drill too many extra holes, making the installation more secure. ‌‌‌

The advantages of steel-calcium board include strong fire resistance: it belongs to Class A1 non-combustible material, which means it will not burn or produce toxic gases when exposed to fire, making it particularly safe for use in tunnels.

Resistant to impact and corrosion: It boasts high compressive strength, is resistant to impact, and can withstand the corrosion from exhaust fumes. Given the heavy traffic and strong exhaust fumes in tunnels, it is less prone to damage.

Easy to maintain and non-reflective: The surface is easy to clean; just wipe it off when it gets dirty. It features a diffuse reflection design, which means it won't be glaring when a car passes by, reducing glare.

Long lifespan: With stable chemical properties, it can be used for over 20 years without any issues, making it more cost-effective compared to traditional stone materials and aluminum panels. ‌‌‌

Application of steel-calcium board: Transportation stations: Apart from highway tunnels, it is also widely used for wall decoration in subway stations and high-speed rail stations.

Large public buildings: Places like airport terminals, hospitals, and schools often use this type of board due to their high safety requirements.

Special spaces: It is also suitable for use in damp or fire-resistant areas such as urban underpasses and underground space retaining walls. ‌‌‌