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

Preparation method of porous ceramsite, product and application of porous ceramsite in concrete subway track acoustic board

A technology of porous ceramics and concrete, applied in the application of concrete subway track sound-absorbing panels, the field of preparation of porous ceramsite, can solve the problems of a large amount of discharge, poor performance of sintering-free ceramsite, no sound absorption and noise reduction, etc.

Active Publication Date: 2020-08-07
GUANGXI UNIVERSITY OF TECHNOLOGY
View PDF4 Cites 7 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
  • Preparation method of porous ceramsite, product and application of porous ceramsite in concrete subway track acoustic board
  • Preparation method of porous ceramsite, product and application of porous ceramsite in concrete subway track acoustic board
  • Preparation method of porous ceramsite, product and application of porous ceramsite in concrete subway track acoustic board

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 50rpm, ball milling time 30min), the starting powder after ball milling was obtained, and its average particle size was 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 ratio o...

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 50rpm, ball milling time 30min), the starting powder after ball milling was obtained, and its average particle size was 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 / min, a...

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 50rpm, ball milling time 30min), the starting powder after ball milling was obtained, and its average particle size was 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 1:5, obta...

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
particle sizeaaaaaaaaaa
cylinder compressive strengthaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of porous ceramsite, a product and an application of the porous ceramsite in a concrete subway track acoustic board, and the preparation method comprises the following steps: uniformly mixing fly ash, cement, lime and gypsum, and carrying out ball milling treatment to obtain initial powder after ball milling; ball-milling an original expanded perlite raw material to obtain ball-milled expanded perlite powder; uniformly mixing the ball-milled initial powder with the ball-milled expanded perlite powder according to a mass ratio of 100:(4-8) to obtaina mixed raw material; granulating the mixed raw materials; and putting the pelletized ceramsite into an autoclave sterilizer, and carrying out autoclave treatment to obtain the porous ceramsite. According to the invention, a raw material pretreatment mechanism and an autoclaved sterilization maintenance mode are added, and proper expanded perlite is added to well control the concentration of a low-temperature decomposition foaming agent solution; through the synergistic effect of the preparation processes, the apparent porosity of the prepared porous ceramsite is 58.01%, the cylinder compressive strength is 2.70 Mpa, and the porous ceramsite can be applied to concrete subway rail acoustic panels.

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 Applications(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