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

Preparation method and application of late-stage strength-enhancing cementitious material for red mud-based cement concrete

A cement concrete and post-strength technology, which is applied in the field of cement concrete, can solve problems such as the limitation of the amount of red mud, and achieve the effects of avoiding efflorescence, increasing post-strength, and improving mechanical properties

Active Publication Date: 2022-07-22
UNIV OF JINAN
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its high iron and high alkali characteristics, the amount of red mud used in the field of building materials is severely limited

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 and application of late-stage strength-enhancing cementitious material for red mud-based cement concrete
  • Preparation method and application of late-stage strength-enhancing cementitious material for red mud-based cement concrete
  • Preparation method and application of late-stage strength-enhancing cementitious material for red mud-based cement concrete

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0031] A preparation method of a late-stage strength-enhancing cementitious material for red mud-based cement concrete, comprising the following steps:

[0032] (1) Dry the red mud to a water content of less than 1%, and grind it to a 0.2mm sieve with a remainder of 1%. In parts by weight, 40 parts of the red mud, 30 parts of sodium hydroxide, and 30 parts of calcium oxide were mixed uniformly, and the obtained mixture was added with water to prepare a slurry (solid-to-liquid ratio of 1:10). Then, the slurry was put into a closed high-pressure container, and the temperature was raised to 200° C. and then kept for 120 min. After the insulation is completed, it is naturally cooled, the supernatant is discarded, and the solid is washed with clean water for several times until pH2 O mass fraction is 1.32%, K 2 The mass fraction of O was 0.27%, and the ratio of aluminum to silicon was 0.73. The main components of the modified red mud were garnet and hematite.

[0033] (2) adding ...

no. 2 example

[0040] A preparation method of a late-stage strength-enhancing cementitious material for red mud-based cement concrete, comprising the following steps:

[0041] (1) Dry the red mud to a water content of less than 1%, and grind it to a 0.2mm sieve with a remainder of 1%. In parts by weight, 42 parts of the red mud, 25 parts of sodium hydroxide, and 33 parts of calcium oxide were mixed uniformly, and the obtained mixture was added with water to prepare a slurry (solid-to-liquid ratio of 1:10). Sodium hydroxide is used to provide the OH required for the reaction - Concentration and calcium oxide are used to synthesize calcium-iron-aluminum garnet. Then, the slurry was put into a closed high-pressure container, and the temperature was raised to 210° C. and then kept for 120 min. After the insulation is completed, it is naturally cooled, the supernatant is discarded, and the solid is washed with clean water for several times until pH2 O mass fraction is 1.48%, K 2 The mass fract...

no. 3 example

[0049] A preparation method of a late-stage strength-enhancing cementitious material for red mud-based cement concrete, comprising the following steps:

[0050] (1) Dry the red mud to a water content of less than 1%, and grind it to a 0.2mm sieve with a remainder of 1%. In parts by weight, 37 parts of the red mud, 35 parts of sodium hydroxide, and 28 parts of calcium oxide were mixed uniformly, and the obtained mixture was added with water to prepare a slurry (solid-to-liquid ratio of 1:10). Sodium hydroxide is used to provide the OH required for the reaction - Concentration and calcium oxide are used to synthesize calcium-iron-aluminum garnet. Then, the slurry was put into a closed high-pressure container, and the temperature was raised to 220° C. and then kept for 120 min. After the insulation is completed, it is naturally cooled, the supernatant is discarded, and the solid is washed with clean water for several times until pH2 O mass fraction is 0.79%, K 2 The mass fract...

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

No PUM Login to View More

Abstract

The invention discloses a preparation method and application of a late-stage strength-enhancing cementitious material for red mud-based cement concrete. The method includes: (1) modifying the red mud so that the total percentage content of potassium and sodium in the red mud is not more than 2%, and the ratio of aluminum to silicon is not more than 1, so that the main components are calcium iron aluminum garnet and hematite. Sexual red mud. (2) The modified red mud is mixed with calcareous and carbonaceous modifiers and then calcined to obtain calcined red mud. (3) The calcined red mud is made into particles, and then the magnetic products therein are separated, and the remaining non-magnetic residues are cement concrete later-stage strength-enhancing cementitious materials. By modifying the red mud components, the invention lays a foundation for realizing the reforming of the red mud components in the subsequent calcination process, and finally obtains a red mud-based late-stage strength-enhancing cementitious material mainly composed of dicalcium silicate cementitious minerals , which can significantly improve the later strength after being added to cement concrete. At the same time, the iron concentrate with iron grade exceeding 50% can be directly used for steelmaking in the iron and steel smelting industry.

Description

technical field [0001] The invention relates to the technical field of cement concrete, in particular to a preparation method and application of a late-stage strength-enhancing cementitious material for red mud-based cement concrete. Background technique [0002] The disclosure of information in this Background section is only for enhancement of understanding of the general background of the invention and should not necessarily be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. [0003] Red mud is a large amount of solid waste produced in the production of alumina. Due to the high content of alkali and iron, the traditional storage treatment not only occupies land and causes environmental pollution, but also is a waste of resources for the elements in red mud. Therefore, it is of practical significance to develop red mud treatment technology and realize the comprehensive u...

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): C04B22/08C22B1/02B03C1/02C04B18/04
CPCC04B22/08C22B1/02B03C1/02C04B18/0409Y02P10/20
Inventor 吴佳明叶正茂卢晓磊王蓓蓓李全亮
Owner UNIV OF JINAN
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