Vermiculite bricks are insulating products with regular shapes, manufactured from expanded vermiculite mixed with a binder. They include cement-expanded vermiculite products, water glass-expanded vermiculite products, and asphalt-expanded vermiculite products.
The density of vermiculite bricks ranges from 0.4 to 0.8 g/cm³, with a thermal conductivity at room temperature of 293 to 502.4 J/(m·h·℃) (70 to 120 cal/(m·h·℃)). Compressive strength is <2.45 MPa, and water absorption is approximately 6%.
Typically, granular expanded vermiculite is mixed with an appropriate amount of high-strength binder, lightly pressed into shape, and then dried or baked to form the brick. The thermal conductivity of the binder is generally higher than that of expanded vermiculite. Therefore, while the addition of binder enables new applications for expanded vermiculite, it also reduces its thermal insulation effectiveness.
Vermiculite bricks feature a thin-walled hollow structure with low strength and melting point. Their refractoriness and high-temperature performance fall below other lightweight refractories, making them unsuitable for load-bearing applications or as medium-to-high-temperature insulation materials. Their service temperature range is 800–1100°C. Vermiculite bricks are widely used in roofing and soundproofing applications.
Vermiculite Brick Specifications: 240*114*65MM
Custom sizes available upon request.
Applications of Vermiculite Bricks：
Construction: Lightweight materials, lightweight concrete aggregates (lightweight wall powder, lightweight mortar)
Heat-Resistant Materials: Wall cladding, fireproof panels, fire-resistant mortar, refractory bricks
Thermal Insulation & Sound Absorption: Underground pipeline insulation, greenhouse pipe insulation, interior/tunnel lining, public space walls and ceilings
Metallurgy: Steel frame coating, ironmaking, casting slag removal, high-rise steel frame coating material, vermiculite bulk material.
