Calcium silicate board is a lightweight building board made mainly from siliceous materials, calcium materials, and reinforcing fibers, and cured under high temperature and high pressure. It has the characteristics of fire prevention, moisture resistance, lightweight and high strength, and environmental protection, and is widely used in fields such as building partitions, ceilings。
1. Definition and Composition
Calcium silicate board is a multifunctional building board made from siliceous materials (such as quartz sand and fly ash), calcareous materials (such as cement and lime), and reinforcing fibers (such as cellulose fibers and glass fibers) through processes such as pulping, molding, and high-temperature and high-pressure curing. Its core component forms a stable tobermorite crystal structure through chemical reactions, endowing the board with excellent physical properties and chemical stability.
Calcium silicate board is usually divided into two categories: asbestos containing and asbestos free. Modern products often use asbestos free formulas to meet environmental and health standards. The surface of the board can undergo various treatments (such as coating and embossing) to meet different decorative needs.
2. Production process
The manufacturing process of calcium silicate board mainly includes the following steps:
Raw material mixing: Mix siliceous materials, calcareous materials, and fibers in proportion, and add water to make a slurry.
Molding: The slurry is formed into wet board blanks through the process of copying or flowing slurry.
High pressure curing: The slab is steam cured in a high temperature (about 180 ℃) and high pressure (10-12 atmospheres) environment for 8-12 hours, promoting the reaction of silicon and calcium components to form hydrated calcium silicate crystals.
Drying and processing: After drying, cutting, and sanding, the board is formed into a lightweight and high-strength finished product.
This process optimizes the material structure through high temperature and high pressure environment, making the board have both low density and high strength.
3. Performance characteristics
The advantages of calcium silicate board make it stand out in the field of construction:
Fireproof performance: The fire resistance limit can reach 1-3 hours, and it belongs to Class A non combustible materials. It does not release toxic gases when exposed to fire.
Moisture and corrosion resistance: Low water absorption rate (≤ 25%), suitable for humid environments such as bathrooms and basements.
Lightweight and high-strength: with a density of about 1.2-1.5g/cm ³, the bending strength can reach 9-15MPa, easy to cut and not easily deformed.
Environmental friendliness: asbestos free, formaldehyde free, low production energy consumption, recyclable after disposal.
Convenient construction: ceramic tiles can be directly pasted and painted, shortening the construction period.
4. Application Fields
Calcium silicate board is widely used in the following scenarios due to its comprehensive performance:
Indoor partition walls and ceilings: replace traditional gypsum boards to enhance fire and moisture resistance.
Exterior wall insulation decoration: as the base board or decorative panel of the insulation system.
Industrial buildings: used for firewall bodies or equipment protection plates in power plants and chemical plants.
Special places: hospitals, laboratories, and other areas with high cleanliness requirements.
For example, commercial complexes often use calcium silicate board to make fireproof partitions, while residential projects are often used for waterproof ceilings in kitchens and bathrooms.
5. Market prospects
With the advancement of global green building policies such as LEED certification and BREEAM standards, the demand for calcium silicate board market continues to grow. According to industry forecasts, its compound annual growth rate will exceed 6% from 2023 to 2028. The driving factors include:
Policy support: Countries are tightening their standards for building fire prevention and energy efficiency.
The rise of prefabricated buildings: the demand for lightweight prefabricated panels has surged.
Environmental awareness has been raised: asbestos free boards are more favored by consumers.
In the future, calcium silicate board may be combined with new materials (such as aerogel) to further expand its application in ultra-low energy consumption buildings.
conclusion
Hebei Lanxuan Energy saving Building Materials Co., Ltd.'s calcium silicate board has become an indispensable functional material in modern architecture due to its safety, durability, and environmental friendliness. Against the backdrop of urbanization and sustainable development, technological innovation will continue to drive its substitution of traditional building materials in more fields, helping to create a safer and greener building environment.