Overview
Cement-based sandwich panels are composite building materials designed for rapid, cost-effective construction. They consist of two fiber-reinforced cement boards bonded to a lightweight insulating core, creating a rigid yet thermally efficient structure. These panels are factory-produced to precise dimensions, reducing on-site labor and waste. Their modular design allows for quick installation in commercial, industrial, and residential projects, particularly in prefabricated construction systems.
Structure and Working Principle
The panel's structural integrity comes from the cement boards (typically 6-12mm thick), which provide compression strength and surface durability. The core material (usually 50-150mm thick) delivers insulation and shear resistance while keeping weight low. During installation, panels interlock via tongue-and-groove edges or are joined with sealants and mechanical fasteners. The composite action distributes loads across the entire panel, enabling spans up to 6 meters without secondary support in some configurations.
Key Features
Thermal performance is a standout feature, with U-values as low as 0.3 W/m²K depending on core thickness. Most panels achieve Euroclass A or B fire ratings due to the non-combustible cement faces. Acoustic insulation ranges from 30-50dB reduction, making them ideal for office partitions. Unlike traditional masonry, these panels resist moisture damage and fungal growth while maintaining dimensional stability in temperature fluctuations.
Application Areas
In commercial construction, these panels dominate partition wall systems for offices, hotels, and hospitals due to their clean finishes and service integration (e.g., concealed wiring channels). For exterior use, they serve as curtain walls or insulated cladding, particularly in cold storage facilities and modular housing. Specialized versions with reinforced cores are used in mezzanine floors and load-bearing walls for low-rise buildings.
Maintenance and Precautions
Routine maintenance involves inspecting joints annually and reapplying sealant if cracks appear. Avoid high-pressure washing, which can degrade the cement surface over time. During handling, use spreader beams to prevent flexural damage. Storage should be on level ground with protective coverings to prevent moisture absorption. Always verify the panel's load rating before cutting openings for doors or windows.
B2B Procurement Guide
For bulk purchases, request third-party test reports for fire resistance (EN 13501), thermal conductivity (ISO 8301), and compressive strength (EN 826). MOQs typically start at 500m², with lead times of 2-4 weeks for custom sizes. Key suppliers include Kingspan, Nudo, and domestic manufacturers in China. Consider logistics costs—panels are lightweight but bulky, making regional suppliers cost-effective for projects under 10,000m². Negotiate for CAD drawings and installation supervision services.
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