Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sound-absorbing material for subway and its preparing process

A technology for sound-absorbing materials and subways, applied in the field of sound-absorbing materials, can solve the problems of low cost and high sound-absorbing coefficient, and achieve the effects of low bulk density, high sound-absorbing coefficient and good sound-absorbing performance.

Inactive Publication Date: 2002-05-01
曾令可
View PDF0 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of existing sound-absorbing materials, and provide a method for preparing subway sound-absorbing materials with high sound-absorbing coefficient and low cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sound-absorbing material for subway and its preparing process
  • Sound-absorbing material for subway and its preparing process
  • Sound-absorbing material for subway and its preparing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] figure 1 Show the technological process of the subway sound-absorbing material preparation method of the present invention, by figure 1 Visible, the technological process of this method comprises the following operation steps: (1) ceramsite, cement and fly ash in the base material are mixed; (2) dilute foaming agent with water, add the mixture of ceramsite, cement and fly ash (3) Forming; (4) Curing. The composition of the base material of the subway sound-absorbing material is: ceramsite: 70%; alunite expansion cement: 20%; fly ash: 10%; foaming agent: 2%. The subway sound-absorbing material can be prepared according to the above process, and its performance test results are shown in Table 1.

[0017] Wet bulk density (kg / m 3 )

Embodiment 2

[0019] figure 2 Another process flow of the method for preparing the subway sound-absorbing material of the present invention is shown, by figure 2 Visible, the technological process of this method comprises the following operation steps: (1) add waterproofing agent to expanded perlite, then stir and mix to obtain perlite slurry; (2) mix perlite slurry with ceramsite, cement and fly ash; ( 3) Dilute the foaming agent with water, add to the mixture in the above steps and stir to mix; (4) Forming; (5) Curing. The composition of the base material of the subway sound-absorbing material is: ceramsite: 47%; alunite expanded cement: 28%; polymer cement: 10%; lightweight cement: 10%; expanded perlite: 5%; foaming agent: 1%; waterproofing agent: 2%. according to figure 2 The technological process shown is prepared to obtain the local subway sound-absorbing material, and its performance test results are shown in Table 2.

[0020] Wet bulk density (kg / m3)

[0021] As can...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Sound absorption coefficientaaaaaaaaaa
Sound absorption coefficientaaaaaaaaaa
Login to View More

Abstract

A sound-absorbing material for subway is prepared from haydite (40-70%), cement (20-48%) flyash (0-10%) and foaming agent (1-2%) through diluting foaming agent with water, mixing the others, adding the deluted foaming agent to the mixture and shaping. Its advantages are broad audio band, high sound absorptivity, low volume weight, high strength, resisting fire and water, no toxicity, and low cost.

Description

(1) Technical field [0001] The invention relates to a sound-absorbing material, in particular to a subway sound-absorbing material used in a subway tunnel and a preparation method thereof. (2) Background technology [0002] Subway sound-absorbing materials are mainly used in the construction of subway tunnels to absorb and eliminate the noise generated by subways. According to the requirements of the use environment, subway sound-absorbing materials must meet the following conditions: ①Waterproof, flame-retardant, at least not less than 20 years old Service life; ② does not contain asbestos, mineral fiber, polystyrene and corrosive substances; ③ in order to meet the safety and fire prevention requirements, the fire value, smoke value and flammability value of sound-absorbing materials should be zero; ④ has a high The medium and high frequency sound absorption coefficient and certain strength. At present, the subway sound-absorbing materials used in China are mainly imported...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B14/04C04B18/08C04B28/04E04B1/82
CPCY02W30/91
Inventor 曾令可黄浪欢黄其秀张守梅任雪潭罗民华
Owner 曾令可
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com