Ceramsite composite acoustic board and sound absorption method thereof

Abstract

The invention discloses a ceramsite composite acoustic board and a sound absorption method thereof, and relates to the field of sound absorption boards. The ceramsite composite acoustic board comprises a shell, a ceramsite layer and a sound insulation layer, the ceramsite layer and the sound insulation layer for noise to sequentially pass through are arranged in the shell, and a cavity is formed between the sound insulation layer and the inner wall of the shell. The cavity is formed between the sound insulation layer and the inner wall of the shell, a small part of noise enters the cavity after passing through the ceramsite layer and the sound insulation layer and repeatedly oscillates in the cavity until attenuation is zero, and the sound absorption and sound insulation effects are improved; and the ceramsite layer is arranged to replace rock wool, glass wool and other fiber materials, the structural strength is improved, the ceramsite composite acoustic board is not easy to damage and good in weather resistance, the function cannot be reduced within the service life, and solid waste pollution cannot be caused by natural degradation after scrapping.

Description

technical field [0001] The invention relates to the field of sound-absorbing boards, in particular to a ceramsite composite sound-absorbing board and a sound-absorbing method thereof. Background technique [0002] The acoustic environment is an important part of the building environment. In buildings, people need a quiet environment and clear hearing. The sound effect in the room is closely related to the acoustic characteristics of the building materials on the roof, wall, and ground. When a large amount of concrete, When using dense and hard sound reflective materials such as gypsum board, glass, metal plate, stone, ceramic tile, etc., due to the reverberation superposition of sound reflection, the indoor sound will be noisy and unclear. [0003] Installing sound-absorbing decorative panels indoors is an effective measure. Generally, sound-absorbing decorative panels are made of sound-absorbing materials with a certain sound absorption coefficient. Materials less than 0.2...

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Problems solved by technology

[0003] Installing sound-absorbing decorative panels indoors is an effective measure. Generally, sound-absorbing decorative panels are made of sound-absorbing materials with a certain sound absorption coefficient. Materials less than 0.2 are reflective materials, materials with NRC greater than 0.2 are considered sound-absorbing materials, and the sound absorption coefficient reflects the ability of sound-absorbing materials to absorb sound; traditional sound-absorbing materials generally include mineral wool board, wood wool board, glass fiber cotton, Rock wool, microporous sponge, polyester fiber board, perforated metal board, perforated wood board, etc. However, the disadvantages of these mineral fiber sound-absorbing materials are: poor material strength, poor aesthetics, fiber dust, etc., and are prone to deformation after long-term use , cracking or peeling off, the filling cannot be degraded naturally when it is scrapped, causing solid waste pollution to the surrounding environment

[0004] The ceramsite fired with clay is a granular material that naturally forms a large number of micropores in the production process. The abundant micropores in the ceramsite itself have a good sound absorption effect. For a long time, people mostly use ceramsite as Filling aggregates or laminated filter materials, no one has ever used the microporous structure inside ceramsite for building sound absorption. Even if there are cases of using ceramsite as a sound-absorbing board, it is only by using the gaps between ceramsite as aggregates to absorb sound. sound, but this kind of sound absorption efficiency is low, the sound insulation effect is poor, and it cannot meet the engineering requirements

[0005] The application number is "201820816164.5", and the invention patent named "cement ceramsite sound-absorbing board" discloses a cement ceramsite sound-absorbing board, which includes a bottom frame of a concrete structure, and the bottom frame includes a rectangular bottom plate and a raised frame around it. , there is a filler in the bottom frame, the filler is a double-layer structure, the inner layer is a foam sound-absorbing cotton layer, the outer layer is a cement ceramsite layer, the outer surface of the cement ceramsite layer is concave-convex, and the cement ceramsite layer has the highest The plane is flush with the end face of the frame. After the noise passes through the cement ceramsite layer and the foam sound-absorbing cotton layer, part of the unabsorbed noise will be transmitted through the bottom frame. The sound absorption and sound insulation effects are poor, and the filling cannot be naturally degraded when it is scrapped. , causing solid waste pollution to the surrounding environment

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