Special sound-absorbing board for aggregated sand tunnel and its preparation method

Abstract

The invention discloses a special sound absorbing plate for a polymerized-sand tunnel and a preparation method thereof, and belongs to the field of special sound absorbing materials for reducing the noise of various tunnels. The special sound absorbing plate is mainly combined by three parts, i.e., sand grains, a silicon-based polymer and a steel mesh. The sound absorbing plate is formed by polymerization and pressing from the silicon-based polymer, and screened high-quality natural silicon-dioxide sand grains in combination with the stainless steel mesh. In the polymerization process, the silicon-philic end of the polymer and silicon dioxide on the surfaces of the sand grains are polymerized and dissolved, and the winding end of the polymer enables the sand grains to be close mutually; when the sand grains are contacted, dissolved silicon dioxide is mutually fused and penetrated so as to form good porous sound-absorbing performance. The special sound absorbing plate disclosed by the invention has the advantages that the requirements for physical and acoustic performances such as fire resistance, weather resistance, moisture resistance, safety, environment-friendly effect and high sound-absorbing performance and the like are met, and also has the advantages of convenience in material taking and low cost and the like.

Description

technical field [0001] The invention belongs to the field of special sound-absorbing materials for tunnel noise reduction, and in particular relates to a multi-functional aggregated sand special-purpose sound-absorbing board for tunnels, which can be used in various tunnels such as high-speed rail tunnels, subway tunnels, and highway tunnels. Background technique [0002] In high-speed rail tunnels, subway tunnels, and highway tunnels, because the noise cannot be diffused when vehicles pass by, extremely strong noise will be generated in the tunnel. At present, porous sound-absorbing materials and spraying methods are generally used after perforated plates. These pores can go deep into the material, and friction with the material converts sound energy into heat energy, achieving the effect of sound absorption. But in fact, these materials have insufficient functions, such as secondary pollution, fear of humidity, fear of wind pressure impact, and fire resistance, which are ...

AI Technical Summary

Problems solved by technology

However, the environment in the tunnel is very special. There is no sunlight in the tunnel, and it is generally relatively humid. The vehicles move fast and have strong wind noise pressure, which has a strong impact. These sound-absorbing panels are difficult to adapt to this special environment.

Images