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

Preparation method for early strength cement admixture containing red mud or coal gangue

A technology of coal gangue and mixed materials, applied in the field of cement materials, can solve the problems of land occupation and serious environmental pollution

Inactive Publication Date: 2012-10-10
HENAN POLYTECHNIC UNIV
View PDF1 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of stockpiled red mud and coal gangue not only occupy a large amount of land, but also seriously pollute the environment

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 for early strength cement admixture containing red mud or coal gangue
  • Preparation method for early strength cement admixture containing red mud or coal gangue
  • Preparation method for early strength cement admixture containing red mud or coal gangue

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0029] Mix the red mud and coal gangue and process the composite mixed material after treatment and calcining for 30 minutes with cement clinker and gypsum according to the ratio shown in Table 1. Add water at a gray ratio of 0.5, stir slowly for 120 seconds, stop for 15 seconds, and stop after stirring rapidly for 120 seconds. Put the clean slurry into a mold of 20×20×20mm, standard curing, and test its strength at 2d and 28d. The experimental results are shown in Table 1.

example 2

[0031] Red mud and desulfurized gypsum were processed and calcined for 30 minutes and mixed with cement clinker according to the ratio shown in Table 1. The grinding completely passed through a 0.075mm sieve, and then put into a cement slurry mixer, and water was added at a water-cement ratio of 0.5. seconds, stop for 15 seconds, stop after 120 seconds of rapid stirring, put the clean slurry into a mold of 20×20×20mm, and test its strength at 2d and 28d. The experimental results are shown in Table 1;

[0032] Table 1 The strength of the composite mixture calcined at different temperatures (the proportions in the table are all percentages by weight)

[0033]

[0034] It can be seen from Table 1 that the composite mixture obtained by mixing red mud, coal gangue or desulfurized gypsum and red mud in proportion and calcining respectively can improve the early strength of cement paste, in which red mud and coal gangue are mixed at a ratio of 3:7, red mud Mud and desulfurized gy...

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 for an early strength cement admixture containing red mud or coal gangue. The method includes: respectively mixing the red mud and the coal gangue or flue gas desulfurization gypsum and the red mud according to following proportions, by weight, 8:2-6:4 for the red mud to the flue gas desulfurization gypsum and 3:7-5:5 for the red mud to the coal gangue, grinding, calcining at a temperature of 600 to 800 DEG C, composing the red mud and the coal gangue with cement clinker and gypsum, or composing the flue gas desulfurization gypsum and the red mud with the cement clinker to obtain the composite admixture capable of improving early strength of cement paste. The composite admixture obtained by industrial wastes such as the red mud, the coal gangue has good economic and environmental benefits, and the early strength cement admixture is low in firing temperature and economical in energy resources, meets national strategic guidelines on energy conservation and environment protection and has good development prospects.

Description

technical field [0001] The invention belongs to the technical field of cement materials, in particular to an early-strength cement mixture containing red mud or coal gangue and a preparation method thereof. Background technique [0002] Cement is an important basic raw material for national economic construction. With the continuous development of the national economy, the demand for cement will still increase substantially, but cement production consumes a large amount of non-renewable resources and energy such as limestone, clay, coal, etc., and at the same time emits a large amount of waste gas and dust, causing environmental damage. Serious pollution, resources, energy, and environmental problems of the cement industry have become the main factors restricting the development. It is a topic of environmental protection significance and economic value to use industrial waste as much as possible to produce cement. [0003] Red mud and coal gangue are industrial wastes with ...

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): C04B7/153C04B7/36
CPCY02P40/10
Inventor 廖建国谢玉芬赵宇张义顺朱伶俐宋志洋刘琼马倩
Owner HENAN POLYTECHNIC UNIV
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