Composite noise-proof barrier

Abstract

The invention belongs to the technical field of sound insulation barrier, in particular to a composite sound insulation barrier. 30 to 40 parts of magnesium oxide, 20 to 25 parts of magnesium chloride, 20 to 30 parts of water, 0.3 to 0.5 parts of modifier, 0.05 to 0.15 parts of foaming agent, 5 to 10 parts of fly ash, 5 to 10 parts of sawdust and 0.01-0.05parts of granulating agent. 0.05; The composite sound insulation barrier of the invention has excellent barrier noise function and good sound absorption and insulation effect, it also has high mechanical strength in construction application,Low density and light weight, the cutting adhesion construction performance is good, Water-proof, moisture-proof, corrosion-proof, mildew-proof, not easy to break, aging, long service life and other excellent material characteristics, and does not contain any heavy metals and other harmful substances, suitable for road sound barrier as sound-absorbing and insulation core material, but also used incity libraries, schools, hospitals, office buildings and other buildings as sound-absorbing and insulation materials for internal and external walls.

Description

technical field [0001] The invention belongs to the technical field of sound insulation barriers, and in particular relates to a composite sound insulation barrier. 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 increases. In this context, sound barriers ...

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