A sound insulation barrier composed of multiple cavities and porous sound absorbing material combinations

Abstract

The invention belongs to the technical field of sound insulation barrier, in particular to a sound insulation barrier composed of multiple cavities and porous sound absorbing material combinations. Comprises a noise barrier body made of alkali-resistant glass fiber reinforced cement, wherein the alkali-resistant glass fiber reinforced cement comprises the following components by weight: cement 40-60, sand 40-55, alkali-resistant glass fiber 2-4, expanded perlite 10-20 part, vinyl acetate-Ethylene copolymer emulsion 0.3-3 part, calcium stearate 1-3 part, water 30-100 part; The sound insulationbarrier composed of multi-cavity and porous sound absorbing material combinations has excellent noise barrier function and sound absorption and insulation effect, It also has good properties in construction and application, such as high mechanical strength, low density and light weight, good cutting and adhesion, strong waterproofing, moisture resistance, corrosion resistance and mildew resistance, long service life, and it does not contain any harmful substances such as heavy metals, and is suitable for road sound barrier as sound absorption and insulation core material.

Description

technical field [0001] The invention belongs to the technical field of sound insulation barriers, in particular to a sound insulation barrier composed of multiple cavities and porous sound-absorbing materials. Background technique [0002] With the development of urban construction, the problem of traffic noise has attracted more and more attention from us. The sound source of traffic noise is flowing, the sound is extremely high, the interference time is long, and the impact range is wide, which has seriously disrupted the normal life and rest of urban and rural residents. Statistics show that the noise that has the greatest impact on urban residents in my country is traffic noise, accounting for about 35% of all types of urban noise. In more than 80% of large and medium-sized cities in my country, the daytime noise equivalent sound level of traffic arteries exceeds 70dB(A). Moreover, traffic noise is mostly a line sound source, and the attenuation is less as the distance...

AI Technical Summary

Problems solved by technology

The actual measurement results show that the noise reduction effect of the sound barrier on sensitive points can generally reach about 6-10dB no matter day or night, but it is still difficult to meet the environmental noise requirements of residential buildings at night

[0003] Analyzing the reason, since the main frequency range of traffic noise is the middle and low frequency sound mainly at 500HZ, the wavelength is longer, and the existing sound barrier mainly achieves the purpose of sound insulation through the reflection of sound, because the wavelength of the noise is relatively long, so The sound diffraction phenomenon is strong, which affects the effect of the sound barrier