Cement-based railway sound barrier absorbing material and preparation method thereof

A sound-absorbing material and sound barrier technology, applied in the field of building materials, can solve the problem that railway sound barrier materials cannot meet the requirements, and achieve the effects of good sound absorption performance, improved connectivity porosity, and low cost.

Active Publication Date: 2017-03-15
POWERCHINA CHENGDU ENG
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a cement-based sound-absorbing material for railway sound barriers, aiming to solve the problem that existing railway sound barrier

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] A method for preparing a cement-based railway sound barrier sound-absorbing material, which is used to prepare the above-mentioned cement-based railway sound barrier sound-absorbing material; the preparation method includes the following steps:

[0031] a. Take the required cement, slag particles, expanded perlite particles, water, water reducing agent, foaming agent and fiber according to the weight ratio; when the slag particles and / or expanded perlite particles contain water, convert it to dry The quality of the state is weighed again, and the contained moisture is counted in the water as raw material; In this step, slag particles and / or expanded perlite particles refer to slag particles, or expanded perlite particles, or slag particles and expanded perlite particles particles;

[0032] b. Add the fiber into the water and stir it quickly with a machine for 30-60s. Skip this step when no fiber is added;

[0033] c. Continue to add cement and water reducer to water, a...

Embodiment 1

[0042] The cement-based sound-absorbing material for railway sound barriers is prepared from the following raw materials in the weight ratio: 100 parts of cement, 250 parts of slag particles, 0 parts of expanded perlite particles, 50 parts of water, 3 parts of water reducing agent, and foaming agent 0 parts, 0 parts fiber.

[0043] The method for preparing the above-mentioned cement-based railway sound barrier sound-absorbing material:

[0044] a. Weigh the required cement, slag particles, water and water reducing agent according to the weight ratio; in water;

[0045] c. Add cement and water reducer to water, and stir to prepare cement slurry;

[0046] e. Add slag particles to the cement slurry and stir for 120s to make a semi-dry mixture;

[0047] f. Fill the mixture into the mold, and then use 50±2kPa of static pressure to press and form it into a material blank;

[0048] g. Release the mold after curing for 1 day at a temperature of 20°C and a relative humidity of 90%;...

Embodiment 2

[0053] The cement-based sound-absorbing material for railway sound barriers is prepared from the following raw materials in the weight ratio: 100 parts of cement, 180 parts of slag particles, 20 parts of expanded perlite particles, 50 parts of water, 2 parts of water reducing agent, and foaming agent 0 parts, 0 parts fiber.

[0054] The method for preparing the above-mentioned cement-based railway sound barrier sound-absorbing material:

[0055] a. Weigh the required cement, slag particles, expanded perlite particles, water and water reducer according to the above weight ratio; when the slag particles and / or expanded perlite particles contain water, convert them into dry state and weigh again , and the contained moisture is included in the water used as raw material;

[0056] c. Add cement and water reducer to water, and stir to prepare cement slurry;

[0057] e. Add slag particles and expanded perlite particles to the cement slurry and stir for 120s to make a semi-dry mixtu...

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
Compressive strengthaaaaaaaaaa
Apparent densityaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the field of building materials, particularly discloses a cement-based railway sound barrier absorbing material and a preparation method thereof and is intended to solve the problem that existing railway sound barrier materials are unable to meet the requirements provided in Technical Requirements and Test Methods for Acoustic Elements of Railway Sound Barrier (TB/T 3122-2010). The cement-based railway sound barrier absorbing material is prepared from, by weight, 100 parts of cement, 180-250 parts of mineral residue particles, 0-40 parts of expanded perlite particles, 45-55 parts of water, 2-4 parts of a water reducer, 0-2 parts of a foaming agent, and 0-0.4 part of fibers. The cement-based railway sound barrier absorbing material has good sound-absorbing property and has acoustic properties that meet the requirement in Technical Requirements and Test Methods for Acoustic Elements of Railway Sound Barrier (TB/T 3122-2010) that denoising coefficient is not less than 0.70 when train operation velocity is 200 km/h and above.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a cement-based sound-absorbing material for railway sound barriers and a preparation method thereof. Background technique [0002] At present, the total level of railway noise in my country has long been higher than 80dB, which has brought serious noise pollution problems. For the control of railway noise, the usual practice at home and abroad is to set up sound barriers and / or install sound-absorbing materials to improve the sound environment when trains are running. When the high-speed train is running, the main noise frequency band is 80Hz-1000Hz, and its main peak frequency is concentrated at 800Hz-1000Hz. Studies have shown that in the design of sound barriers, the use of sound-absorbing materials with high sound absorption coefficients for different noise frequencies can alleviate the problem of noise pollution in sensitive areas. Therefore, inventing railway...

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
IPC IPC(8): C04B28/04C04B14/18C04B18/14
CPCC04B14/185C04B18/141C04B28/04C04B2111/0075C04B2201/20C04B2201/50C04B22/002C04B2103/302Y02W30/91
Inventor 全明徐家伟郝元麟
Owner POWERCHINA CHENGDU ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap