Sound-insulating plate for reducing noise of high-speed train

Abstract

The invention discloses a sound insulation board for high-speed rail noise reduction, which comprises a skeleton and a filler, the filler fills the gaps in the skeleton; the skeleton is formed by bonding skeleton particles, and the filler includes filler particles, a binder and a coupler Joint agent; the framework particles include large framework particles and small framework particles, and the particle diameter of the large framework particles is 2 times that of the small framework particles; the particle diameter of the framework particles is 2-8 times the particle diameter of the filling particles. The invention uses microparticles as raw materials, not only has good sound insulation performance, but also has good anticorrosion and waterproof performance.

Description

technical field [0001] The invention relates to a sound insulation board for high-speed rail noise reduction, and belongs to the technical field of environmental noise pollution control equipment. Background technique [0002] In recent years, the rapid development of high-speed railway construction has brought people fast, comfortable and convenient travel, but the noise pollution generated by the operation of high-speed trains has also caused great harm to the lives of residents on both sides of the railway line. Impact. According to reports, in November 2008, the Building Environment Testing Center of Tsinghua University actually measured that when the 300-350km / h EMUs of the Tianjin-Beijing Intercity Railway were running, the actual peak noise at a distance of 15m from the track on one side of the line could reach 90dB. Exposure to such intensity of noise for a long time will cause great harm to personal health. For controlling this environmental noise pollution, peopl...

AI Technical Summary

Problems solved by technology

Metal sound insulation materials are not only expensive, but because of their relatively weak rigidity, their sound insulation performance is not ideal, and their anti-corrosion performance cannot meet the requirements of use.

Cement fiber sound insulation board is a board made of wood fiber mixed with inorganic hydraulic cementitious materials such as cement and sand, which is pressurized. Because it contains wood fiber, it has poor waterproof performance and can only be used in dry indoor environments. Its sound insulation performance will be greatly reduced, and its appearance quality is not good, generally it cannot be used directly as an exterior wall

Moreover, the cement-based gelling material will form micropores when it is evaporated and solidified. The existence of micropores not only reduces the waterproofness of the cement fiber sound insulation board, but also affects its sound insulation.