Cement-based sawdust composite noise barrier

A composite sound, cement-based technology, applied in the direction of roads, noise absorption devices, tracks, etc., can solve the problems of time-consuming, high cost, and restricting the application and promotion of cement-based sound-absorbing panels.

Inactive Publication Date: 2013-01-02
郭云驰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sound absorption coefficient of the wood foam cement sound-absorbing board made by this method is about 0.62-0.72. Since the wood chips need to be pre-soaked, the production process is complicated and the cycle is long
When the above two kinds of sound-absorbing materials are used as sound-absorbing barriers, they must be combined with high-strength backboards because of their low flexural strength and are easy to break. The cost is high, and the progress of the project is slow and labor-intensive.
[0009] Many of the above shortcomings have greatly restricted the application and promotion of cement-based sound-absorbing panels in sound-absorbing and insulating barrier projects.

Method used

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  • Cement-based sawdust composite noise barrier

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment one: from figure 1 It can be seen from the figure that a cement-based wood chip composite sound barrier is composed of a wood chip layer 1 and a concrete layer 3, and the wood chip layer 1 is composed of wood chip particles, glue, cement, water and yellow sand by weight 1:0.048:1.8:4.5 :2.7 ratio for mixing. Then pour it into the mold and pave it, and finally add a certain amount of cement concrete mixture to pave it, press the whole mold under a certain pressure, and release the mold after maintaining the pressure. The thickness of the sawdust layer 1 is 7cm, and the thickness of the concrete layer 3 is 5.5cm; the size of the sawdust particles is 8*4*1mm, and the sawdust particles have been mineralized.

Embodiment 2

[0023] Embodiment 2: A cement-based sawdust composite sound barrier is composed of a sawdust layer 1 and a concrete layer 3, and the sawdust layer 1 is composed of sawdust particles, glue, cement, water and yellow sand in a weight ratio of 1:0.05:2:5: 3 ratio for mixing. Then pour it into the mold and pave it, and finally add a certain amount of cement concrete mixture to pave it, press the whole mold under a certain pressure, and release the mold after maintaining the pressure. The thickness of the sawdust layer is 8cm, and the thickness of the concrete layer 3 is 6cm; the size of the sawdust particles is 10*5*2mm, and the sawdust particles have been mineralized.

Embodiment 3

[0024] Embodiment 3: A cement-based sawdust composite sound barrier, consisting of a sawdust layer 1 and a concrete layer 3, the sawdust layer 1 is composed of sawdust particles, glue, cement, water and yellow sand by weight 1:0.052:2.2:5.5: 3.3 ratio for mixing. Then pour it into the mold and pave it, and finally add a certain amount of cement concrete mixture to pave it, press the whole mold under a certain pressure, and release the mold after maintaining the pressure. The thickness of the sawdust layer 1 is 9cm, and the thickness of the concrete layer 3 is 6.5cm; the size of the sawdust particles is 12*6*3mm, and the sawdust particles have been mineralized.

[0025] In order to improve the strength of the sound barrier, a reinforcement mesh 2 is arranged in the sawdust layer 1 .

[0026] In addition, surface spraying can be carried out according to customer requirements.

[0027] The technical indicators of the cement-based wood chip composite sound barrier are as follows...

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Abstract

The invention discloses a cement-based sawdust composite noise barrier mainly applicable to noise preventing projects of railways and urban light railway projects. The cement-based sawdust composite noise barrier comprises a sawdust layer and a concrete layer. The sawdust layer is made by mixing sawdust particles, glue, cement, water and yellow sands according to a weight proportion of 1:0.048-0.052:1.8-2.2:4.5-5.5:2.7-3.3. Bonding force of cement gum is used to bond the sawdust layer and the concrete layer. Pores of the sawdust layer are used to absorb noise energy for consumption, and accordingly noise reduction is achieved, noise reduction coefficient reaches more than 0.7, and noise insulation factor reaches 25dB. The cement-based sawdust composite noise barrier is fine in noise absorption, fracture-resistant, high in impact strength, fine in freezing and thawing resistance, stable in material chemical properties, humidity-resistant, anticorrosion, mildew-resistant, nonflammable, pollution-free, easy to transport, convenient to mount and maintain and the like.

Description

technical field [0001] The invention relates to a cement-based sound-absorbing board, which is mainly used in noise prevention and control projects in railway and urban light rail projects. Background technique [0002] With the rapid development of my country's economy and the rapid advancement of industrialization and urbanization. In recent years, the number of railways, highways, subways and urban light rails has increased day by day. While it is convenient for people to travel, it has become the fourth largest pollution after air pollution, water pollution and solid waste pollution. The problem of noise pollution control It has become a social problem to be solved. Among the various methods for the prevention and control of noise generated in traffic facilities, setting up sound-absorbing and insulating barriers is a relatively effective method. However, the existing sound-absorbing and insulating barriers have low sound-absorbing and insulating efficiency, unstable s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01F8/00E01B19/00
Inventor 郭云驰
Owner 郭云驰
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