Porous perlite sound absorption material

Abstract

The invention discloses a porous perlite sound absorption material used for building a sound absorption wall, characterized in that the porous perlite sound absorption material is prepared by the following procedures: blending and pelletizing the materials, pouring a soleplate, pouring a sound absorption plate, pressing, demolding, curing and vapor curing at 40 DEG C, and the like; the material is composed of the following ingredients in mass ratio: 1 part of perlite, 6 parts of 425 cement, 0.3 parts of high early strength cement, 0.1 part of polymer emulsion, 0.1 part of pelletizing agent, 0.01 part of plasticizer and 0.1 part of other accessory ingredients. The sound absorption material using perlite as aggregate disclosed by the invention has the advantages of excellent sound absorption effect, large anti-bending and anti-pressing strength, high sound absorption coefficient and wide sound absorption frequency band, and the sound absorption material has such excellent functions as fire resistance, moisture resistance, durability and innocuity, and the like, so that the sound absorption material has an extensive application prospect.

Description

technical field [0001] The invention belongs to new building materials, and in particular relates to a formula and production technology of an expanded perlite sound-absorbing material used for high-speed railway station platforms, factory buildings, highway and railway partitions, and sound-absorbing walls. Background technique [0002] Sound-absorbing material is a material that has a strong ability to absorb sound energy and reduce noise. A material that absorbs incident sound energy by virtue of its own porosity, thin-film action, or resonance. The sound-absorbing material should match the acoustic characteristic impedance of the surrounding sound-transmitting medium, so that the sound energy enters the sound-absorbing material without reflection, and most of the incident sound energy is absorbed. [0003] Early sound-absorbing materials were mainly natural porous organic materials such as cotton, linen, and felt. Natural fiber materials have low cost, wide sound-absor...

AI Technical Summary

Problems solved by technology

However, resonant sound-absorbing materials have a narrow sound-absorbing frequency band and are highly selective to frequencies. Generally, they are only suitable for medium and low-frequency single-frequency sounds, and have not been able to replace fibrous sound-absorbing materials for a long time.

Subsequently, porous metal sound-absorbing materials such as foam metal and metal fiber appeared, but porous metal has problems such as high cost and difficult control of process conditions.

Foam polymer sound-absorbing materials have good sound-absorbing effects, but they have poor performances such as fire resistance and aging resistance, which limit their wide use

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