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Manufacturing method of cement based sawdust composite sound barrier

A manufacturing method and composite sound technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of low flexural strength, slow engineering progress, complex production process, etc., and achieve high impact strength. , Good freeze-thaw resistance and stable chemical properties

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: A method for manufacturing a cement-based wood chip composite sound barrier, which is characterized in that: first, wood chip particles, glue, cement, water and yellow sand are mixed in a certain proportion to form a saw chip mixture; half of the wood chip mixture is injected into the mold Pave it flat, put in the steel mesh, and then pour the rest of the wood chip mixture into the mold to pave it; then inject the cement concrete mixture, hold the pressure at 450T for 18 hours, and finally demould to form a cement-based wood chip composite sound barrier.

Embodiment 2

[0017] Embodiment 2: A method for manufacturing a cement-based wood chip composite sound barrier, characterized in that: first, wood chip particles, glue, cement, water and yellow sand are mixed in a certain proportion to form a wood chip mixture; half of the wood chip mixture is injected into the mold Pave it flat, put in the steel mesh, and then pour the rest of the wood chip mixture into the mold to pave it; then inject the cement concrete mixture, hold the pressure for 30 hours under a pressure of 500T, and finally demould to form a cement-based wood chip composite sound barrier.

Embodiment 3

[0018] Embodiment 3: A method for manufacturing a cement-based wood chip composite sound barrier, characterized in that: firstly, wood chip particles, glue, cement, water and yellow sand are mixed in a certain proportion to form a saw chip mixture; half of the wood chip mixture is injected into the mold Pave it flat, put in the steel mesh, and then pour the rest of the sawdust mixture into the mold to pave it; then inject the cement concrete mixture, hold the pressure for 24 hours under a pressure of 480T, and finally demould to form a cement-based wood chip composite sound barrier.

[0019] The technical indicators of the cement-based wood chip composite sound barrier manufactured by this method are as follows:

[0020] Noise reduction coefficient: ≥0.7

[0021] Sound insulation: Rw≥25dB

[0022] Surface density: 160kg / m 2 ≤D≥284kg / m 2

[0023] Surface compressive strength: ≥6MPa

[0024] Anti-bending fracture load: ≥4kPa

[0025] Anti-deformation performance: maximum ...

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Abstract

The invention discloses a manufacturing method of cement based sawdust composite sound barrier mainly used in noise prevention engineering of railway and urban light rail engineering. The method is characterized by proportionally mixing sawdust particles, cementing agent, cement, water and yellow sand to obtain a mixture; injecting half of the mixture into a mold and leveling, placing a reinforcement net, and injecting the rest of the mixture into the mold and leveling; and pouring cement concrete, holding at a pressure of 450-500 T for 18-30 h, and demolding to form the cement based sawdust composite sound barrier. Using the binding force of cement, the sawdust layer and the concrete layer are cemented together, and meanwhile, the purpose of noise reduction is achieved by means of pores of the sawdust layer. The manufactured barrier has the advantages of good sound absorption performance, high folding strength and impact strength, good freeze-thaw resistance, stable chemical property, good resistance to moisture and corrosion, good mildewproof property, good flame retardancy, no pollution, easy transport and convenient installation and maintenance.

Description

technical field [0001] The invention relates to a cement-based sound-absorbing board mainly used in noise prevention and control projects in railway and urban light rail projects, in particular to a method for manufacturing the cement-based sound-absorbing board. 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 insulati...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/48C04B18/26C04B111/52
CPCY02W30/91
Inventor 郭云驰
Owner 郭云驰
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