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

A preparation method and product of porous ceramsite and its application in sound-absorbing panels for concrete subway tracks

A porous pottery and concrete technology, applied in ceramic products, rails, applications, etc., can solve the problems of large emissions, poor performance of sinter-free ceramsite, and no sound absorption and noise reduction.

Active Publication Date: 2022-05-06
GUANGXI UNIVERSITY OF TECHNOLOGY
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the process of preparing high-porosity ceramsite mainly adopts high-temperature sintering. Although the sintering process can produce ceramsite with high porosity and excellent strength, the firing temperature of raw materials generally needs to be above 1000°C. Huge energy consumption, in addition, a large amount of carbon dioxide and harmful gas products will be emitted during the sintering process
[0004] The working performance of sinter-free ceramsite is poor. At present, the strength and porosity of sinter-free ceramsite are generally lower than that of sintered ceramsite, and the density is higher than that of sintered ceramsite. Most of the raw materials have pozzolanic activity, and the preparation cycle is relatively short. Therefore, the main research of non-sintered ceramsite focuses on the excitation of strength and its application in lightweight aggregate concrete
Autoclaved curing is a good non-sintering method to stimulate the activity of raw materials and improve the early strength of materials, but unfortunately, at present, the research on the preparation of non-sintered ceramsite by autoclaved curing is mainly concentrated in the application of adsorption and filtration of waste water , there is no research report on the application of sound absorption and noise reduction

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
  • A preparation method and product of porous ceramsite and its application in sound-absorbing panels for concrete subway tracks
  • A preparation method and product of porous ceramsite and its application in sound-absorbing panels for concrete subway tracks
  • A preparation method and product of porous ceramsite and its application in sound-absorbing panels for concrete subway tracks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] The present embodiment provides a kind of preparation method and product of porous ceramsite:

[0070] (1) After mixing fly ash, cement, lime and gypsum evenly (the average particle size of the starting powder of fly ash, cement, lime and gypsum is 22 μm, and the mass ratio of fly ash, cement, lime and gypsum is 25 :5:2:1), ball milling (mass ratio of grinding balls to mixture 12:1, ball milling speed is 50rpm, ball milling time is 30min), and the starting powder after ball milling is obtained, and its average particle size is 13 μm;

[0071] (2) The original expanded perlite raw material (through a 90-mesh sieve) is ball milled (the mass ratio of the grinding ball to the expanded perlite is 12:1, the ball milling speed is 50rpm, and the ball milling time is 6min) to obtain expanded perlite powder after ball milling as a pore-forming material;

[0072] (3) The starting powder after ball milling and the expanded perlite powder after ball milling are mixed evenly in the ...

Embodiment 2

[0091] (1) After mixing fly ash, cement, lime and gypsum evenly (the average particle size of the starting powder of fly ash, cement, lime and gypsum is 22 μm, and the mass ratio of fly ash, cement, lime and gypsum is 25 :5:2:1), ball milling (mass ratio of grinding balls to mixture 12:1, ball milling speed is 50rpm, ball milling time is 30min), and the starting powder after ball milling is obtained, and its average particle size is 13 μm;

[0092] (2) Granulate the initial powder after ball milling in (1). The first 30s of granulator speed is 45rpm. After the powder turns into uniform fine sand, adjust the granulator speed to 30rpm. The total time is controlled as For 25 minutes, the pure aqueous solution is sprayed to evenly wet the powder mixture during the granulation process. The mass ratio of pure water to the mixed raw materials is 1:5 to obtain spherical pellets;

[0093] (3) Put the spherical pellets prepared in (2) into an autoclave, heat up to 110°C at a rate of 5°C...

Embodiment 3

[0095] (1) After mixing fly ash, cement, lime and gypsum evenly (the average particle size of the starting powder of fly ash, cement, lime and gypsum is 22 μm, and the mass ratio of fly ash, cement, lime and gypsum is 25 :5:2:1), ball milling (mass ratio of grinding balls to mixture 12:1, ball milling speed is 50rpm, ball milling time is 30min), and the starting powder after ball milling is obtained, and its average particle size is 13 μm;

[0096] (2) Granulate the initial powder after ball milling in (1). The first 30s of granulator speed is 45rpm. After the powder turns into uniform fine sand, adjust the granulator speed to 30rpm. The total time is controlled as 25min, the blowing agent solution is sprayed to uniformly wet the powder mixture (a certain amount of ammonium bicarbonate is transferred to the container with water to obtain a concentration of 2.0wt.% blowing agent solution) while the granulation process is performed. And the mass ratio of mixed raw material is 1:...

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
cylinder compressive strengthaaaaaaaaaa
densityaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method and product of porous ceramsite and its application in sound-absorbing panels for concrete subway tracks, comprising: after uniformly mixing fly ash, cement, lime and gypsum, and ball milling to obtain the ball-milled starting material powder; the original expanded perlite raw material is ball milled to obtain expanded perlite powder after ball milling; the starting powder after ball milling is mixed evenly with the expanded perlite powder after ball milling in a mass ratio of 100:4-8 to obtain Mix raw materials; granulate the mixed raw materials; put the balled ceramsite into an autoclave sterilizer, and perform autoclave treatment to obtain porous ceramsite. The present invention controls the concentration of the low-temperature decomposition foaming agent solution by increasing the pretreatment mechanism of raw materials, the curing method of autoclave sterilization, and adding appropriate expanded perlite. The synergistic effect of each preparation process makes the porous ceramsite obtained have an apparent porosity of 58.01%, and the cylinder compressive strength is 2.70Mpa, which can be applied to the sound-absorbing panels of concrete subway tracks.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and in particular relates to a preparation method and product of porous ceramsite and its application in sound-absorbing panels for concrete subway tracks. Background technique [0002] Ceramsite is a typical high-quality inorganic porous material, which is spherical in shape with a particle size of 1 to 15mm. It has many characteristics of both inorganic materials and cement-based materials, such as low density, high strength, and flame retardant. Ceramsite is mostly used in construction, environmental protection, metallurgy, petrochemical, gardening and other fields. [0003] The preparation process of ceramsite is divided into high temperature sintering and non-sintering. At present, the process of preparing high-porosity ceramsite mainly adopts high-temperature sintering. Although the sintering process can produce ceramsite with high porosity and excellent strength, ...

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 Patents(China)
IPC IPC(8): C04B38/08C04B28/00C04B40/02E01B19/00E01F8/00C04B111/40
CPCC04B28/00C04B40/024E01B19/003E01F8/0029C04B2111/40C04B2201/20C04B2201/50C04B22/143C04B22/064C04B18/08C04B14/185C04B38/08C04B38/0074C04B38/0067
Inventor 吴辉琴黄焕晟盘荣俊农铠纶沈民合
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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