The key differences between fiber cement board and gypsum board lie in their material composition, physical properties, and application scenarios. Fiber cement board, made primarily from cement and reinforcing fibers, offers high strength, high density, and excellent water and fire resistance. This makes it suitable for use in humid or load-bearing environments. Gypsum board, primarily made from gypsum, is lightweight, easy to process, and low-cost. However, it has poor water resistance and is primarily used for partition walls and ceilings in dry indoor areas.
1. Material Composition Differences
Fiber cement board: Composed of cement reinforced with mineral fibers (such as asbestos) or plant fibers (such as paper pulp), it is manufactured through high-pressure molding and has a high density (1.5-2.0 g/cm³).
Gypsum board: Made from building gypsum powder mixed with fibers (such as paper pulp) and additives, it is pressed and dried, resulting in a lower density (typically <1.5 g/cm³).
2. Physical Properties Comparison
Strength and Durability:
Fiber cement board has a tensile strength of over 20 MPa, a compressive strength exceeding 50 MPa, strong screw-holding power (e.g., 600 N/mm²), and a service life of over 50 years.
Gypsum board has a tensile strength of only 3-5 MPa, weak screw-holding power (approximately 100 N/mm²), is prone to cracking, and has a service life of 10-20 years.
Density and Weight:
Fiber cement board has a high density (1.5-2.0 g/cm³) and is heavier.
Gypsum board has a low density (<1.5 g/cm³), is lightweight, and is easy to transport.
3. Functional Differences
Fire Resistance: Fiber cement board meets the A1 non-combustibility standard and has excellent fire resistance; gypsum board is typically B1-rated and has weaker fire resistance.
Waterproof and Moisture-Resistant Properties: Fiber cement board is waterproof and moisture-resistant, making it suitable for high-humidity
environments (such as bathrooms and kitchens). Gypsum board has low water resistance and is susceptible to deformation in humid conditions.
Soundproofing and Thermal Insulation: Both materials provide sound and thermal insulation. Fiber cement board offers better sound insulation due to its higher density, while gypsum board generally offers slightly better thermal insulation.