The following is a detailed comparative analysis of the two from multiple dimensions.
I. Raw Materials and Production Processes
Cement fiberboard uses cement as the base material, adding fiber reinforcing materials (such as glass fiber, wood fiber, etc.), and is formed through sheet forming, molding, or extrusion processes, followed by high-temperature and high-pressure curing. Its core principle is to enhance the tensile strength of the cement matrix through fiber reinforcement, forming a composite board with both toughness and hardness. Gypsum board, on the other hand, uses building gypsum (hemihydrate gypsum) as the main raw material, incorporating additives and fiber reinforcing materials, and is manufactured through processes such as mixing, molding, and drying. Its production process focuses more on the dehydration and rehydration reaction of gypsum, forming a porous structure board.
II. Comparison of Physical Properties
Strength and Durability: Cement fiberboard has a higher density (approximately 1.2-1.8 g/cm³), and its impact resistance and bending strength are significantly better than gypsum board (density approximately 0.8-1.2 g/cm³). For example, the bending strength of a 12mm thick cement fiberboard can reach over 20MPa, while that of gypsum board of the same thickness is only about 10MPa. Furthermore, cement fiberboard has better water resistance and weather resistance, and is less prone to deformation or powdering when exposed to humid environments for extended periods. Gypsum board, on the other hand, softens easily after absorbing water, resulting in a significant decrease in strength.
Fire resistance: Both are Class A non-combustible materials, but cement fiberboard exhibits stronger structural stability at high temperatures. When gypsum board is exposed to fire, the evaporation of its crystal water forms a heat insulation layer, but the board may crack and detach after the moisture has completely evaporated. Cement fiberboard, due to the tight bond between fibers and cement, maintains its integrity for a longer period.
Sound and heat insulation: Due to its porous structure, gypsum board has slightly better sound insulation performance (50mm thick gypsum board can achieve a sound insulation of 30-35dB), but its heat insulation performance is weaker (thermal conductivity approximately 0.2-0.3W/m·K). Cement fiberboard has an even lower thermal conductivity (approximately 0.15-0.2W/m·K), making it more suitable for applications requiring heat insulation.
III. Differences in Application Scenarios
Interior Decoration: Due to its lightweight and ease of processing, gypsum board is commonly used in lightweight interior decoration projects such as ceilings and partitions, especially suitable for commercial spaces requiring rapid construction (such as offices and shopping malls). Cement fiberboard, on the other hand, due to its high strength and wear resistance, is more often used for floor bases, elevator shafts, and other areas requiring load-bearing or impact resistance.
Exterior Walls and Humid Environments: Cement fiberboard is the preferred material for exterior wall cladding and basement partitions, as its water resistance meets the requirements for long-term exposure to rain and snow. Gypsum board, however, requires waterproof coatings or moisture-proof treatments before use in damp areas such as bathrooms and kitchens.
Special Functional Requirements: For applications requiring fire resistance, explosion-proof properties, or impact resistance, cement fiberboard offers significant advantages. For example, in scenarios such as bank vaults and industrial plants, 12mm thick cement fiberboard can replace traditional brick walls, achieving a balance between lightweight construction and high safety. IV. Cost and Construction Efficiency
**Material Cost:** Ordinary gypsum board is relatively inexpensive (approximately 15-30 RMB/sheet, 1200mm×2400mm×9.5mm), while cement fiberboard is more expensive due to its complex raw materials and manufacturing process (approximately 50-100 RMB/sheet, same specifications). However, considering long-term durability, the overall cost of cement fiberboard may be lower.
**Construction Efficiency:** Gypsum board is lightweight (approximately 8-10kg/sheet), easy to cut and install, and suitable for manual operation; cement fiberboard is heavier (approximately 15-20kg/sheet), requiring mechanical assistance for handling and cutting, but requires no additional reinforcement after installation, thus shortening the construction period.
V. Industry Standards and Certifications
Both must comply with national standards: Gypsum board must meet GB/T 9775-2008 "Paper-faced Gypsum Board", and cement fiberboard must meet JC/T 564.1-2018 "Fiber-reinforced Calcium Silicate Board". When purchasing, pay attention to key indicators such as the fire resistance rating (Class A) and formaldehyde emission level (Class E1) of the boards.