The fiber-reinforced calcium silicate board is mainly composed of a cement material such as a calcium material, a siliceous material, and a reinforcing fiber (mostly replacing the asbestos fiber with a cellulose fiber or an alkali-resistant glass fiber), and is formed by molding and high-pressure steam curing. A new type of lightweight sheet.
According to the product use, fiber-reinforced calcium silicate board can be divided into fiber reinforced calcium silicate board for construction (the thickness of the board is generally 5mm ~ 12mm) and marine fiber reinforced calcium silicate board (the board thickness is generally 15mm ~ 35mm); The reinforcing fiber used, the fiber-reinforced calcium silicate board can be classified into asbestos fiber reinforced calcium silicate board (plain board A and high grade board GA) and non-asbestos fiber reinforced calcium silicate board (common board N and high grade board GN).
The fiber-reinforced calcium silicate board is hydrothermally synthesized due to the autoclave curing of the calcium material and the siliceous material in the substrate in a container having a certain pressure and temperature, and the tortoise is stable in crystal structure. Stone, material properties are stable, shrinkage is minimal. Compared with ordinary calcium silicate board, the amount of reinforcing fiber in fiber-reinforced calcium silicate board is more than 5%, except that it has small apparent density, moisture resistance, anti-mite, mildew resistance and processability. Ordinary calcium silicate board, such as sawing, planable, drillable, and bondable, also has the advantages of high strength, dry shrinkage and swelling. In addition, the fiber-reinforced calcium silicate board also has excellent fire resistance, does not burst and burn in an open flame, and does not generate smoke or toxic gases. The fiber-reinforced calcium silicate board is used as the panel, and the light-filled composite board such as foamed polystyrene light concrete or foamed expanded perlite light concrete is filled in the middle, and the self-weight is small, the sound insulation effect is good, the construction speed is fast, and the price is lower than the light weight. Steel keel on-site composite wall panel.
However, as a microporous calcium silicate insulation material, the fiber-reinforced calcium silicate board has strong water absorption. If the traditional cement mortar surface is used in the construction, the surface is easily cracked, and the surface material and the substrate are not easily bonded. Finishing material.
At present, the domestic production of fiber-reinforced calcium silicate boards is mainly carried out by adopting two processes of copy forming and compression molding. The copy forming method is suitable for the production of large-sized thin plates with a thickness of 6mm to 12mm and an apparent density of about 600kg/m3 to 1200kg/m3, which can be used as interior and exterior wall panels and ceilings of buildings, and is suitable for forming a thickness of 19mm by compression molding. A sheet of ~32 mm and an apparent density of about 750 kg/m3 to 900 kg/m3.
In terms of application, the building fiber reinforced calcium silicate board can be used as a composite wall panel and a lightweight partition wall under various conditions due to its light weight, non-combustible, heat insulation, small dry and wet deformation and good processing performance. The board is especially suitable for the inner and outer wall panels of composite walls, partition boards for public buildings and civil buildings, as well as ceilings and ceilings. Fiber-reinforced calcium silicate boards have good moisture resistance and are therefore suitable for use in wet environments such as bathrooms, kitchens, washrooms and basements. At the same time, the fiber-reinforced calcium silicate board is also suitable for movable ground, and can be used in computer rooms, warehouses and warehouses with fire and moisture requirements.
In general, high-grade buildings should use high-grade plates in non-asbestos fiber reinforced calcium silicate board (excluding asbestos); medium-grade buildings should use high-grade boards in non-asbestos fiber reinforced calcium silicate boards, or non-asbestos fibers. Reinforce the ordinary board or asbestos fiber reinforced high-grade board; ordinary building can use asbestos fiber reinforced ordinary board; the inner partition wall of food processing, medicine and other buildings should not use asbestos-containing board.
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