Overview
Lightweight Aggregate Concrete Base Layer is a specialized construction material designed to reduce structural load while providing thermal and acoustic insulation. It consists of lightweight aggregates (e.g., expanded clay, perlite, or shale) bound by cement and water. Unlike traditional concrete, its density is significantly lower due to porous aggregates, making it ideal for applications where weight reduction is critical. The material is commonly used in modern construction for floor and roof systems, particularly in high-rise buildings and retrofitting projects.
Physical and Chemical Properties
The material's density ranges from 600 to 1600 kg/m³, depending on the aggregate type and mix design. Its thermal conductivity is typically 0.1–0.3 W/m·K, offering superior insulation compared to standard concrete. Chemically, it behaves like conventional concrete but with reduced alkalinity due to lower cement content. The porous structure of aggregates enhances vapor permeability, reducing moisture-related issues. Compressive strength varies from 3 to 15 MPa, suitable for non-load-bearing applications.
Main Applications
Primary uses include floor leveling in residential and commercial buildings, where it minimizes dead load on structures. It also serves as an insulating layer in roof systems, reducing energy costs. In renovation projects, it’s favored for overlaying existing floors without overloading foundations. Specialty applications include soundproofing layers in theaters and vibration damping in industrial settings. Its fire-resistant properties make it suitable for passive fire protection systems.
Safety and Storage
While non-toxic, the material generates dust during mixing and pouring, requiring PPE such as masks and goggles. Prolonged skin contact with wet mix may cause irritation due to alkaline cement content. Storage involves keeping bags or bulk material dry under tarps or in silos. Shelf life is typically 6 months if protected from moisture. On-site, mixed material should be used within 1–2 hours to prevent premature setting.
B2B Procurement Guide
Procurement should prioritize suppliers with certified aggregate sources and consistent quality control. Key specifications to verify include dry density, compressive strength, and thermal conductivity values. Bulk orders often reduce costs by 10–20%. Regional availability of aggregates (e.g., expanded clay in Europe vs. shale in North America) affects pricing. For large projects, consider on-site mixing plants to minimize transport costs of pre-mixed material.
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