Explanation

Also known as porous glass. Take waste glass, mica, perlite and other glass rich phase materials as base material, and add appropriate blowing agent, foaming promoter, and modified additive. It is an inorganic non-metallic glass materials made by fine crushing and uniform mixing, and then melting, foaming and annealing at high temperature. It is composed of a large number of uniform bubble structures with a diameter of 1-2mm. foamglass is divided into closed cell type and open cell type. The closed cell foamglass is generally used as thermal insulation materials, with closed cell bubbles accounting for more than 75%, and the density of products is 160-220kg/m3; The open hole type is generally used as sound absorbing materials (see porous sound absorbing materials for sound absorption mechanism). The open hole bubbles account for more than 50%, and the product density is 180-240kg/tn3. Compared with other foam products, foamglass has the advantages of light weight, incombustible, incorruptible, aging resistant, odorless, moisture resistant, even deformation resistant after water absorption, easy cutting and processing, convenient construction, and no fiber dust pollution. It is suitable for ventilation and air conditioning systems that require a clean environment. The strength of foam glass plate is low. It is not advisable to leave a cavity behind. Otherwise, it may be easily damaged. Therefore, the method of increasing the cavity to improve the low-frequency sound absorption performance of materials is not effective. Widely used in buildings such as subways, underground military facilities, tunnels, factory workshops, concert halls, ventilation and air conditioning systems, theaters, and halls. And the exterior of buildings around the airport. To reduce noise.

Classification