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

A kind of preparation method of gypsum retarder

The technology of gypsum retarder and slag is applied in the field of preparation of inorganic gypsum retarder to achieve the effects of saving resources, wide material sources and reducing pollution

Active Publication Date: 2019-04-19
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many kinds of retarders commonly used, mainly including organic acids and their salts, alkaline phosphate and proteins, which can achieve a certain setting time adjustment in terms of retarding effect. In recent years, bone glue and natural protein products have also appeared. However, it only involves the physical compounding of simple components, in terms of comprehensive application performance of gypsum products

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 kind of preparation method of gypsum retarder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The specific surface area of ​​slag is 394m 2 / kg; the loss on ignition of fly ash is 8.1%, and its 0.08mm square hole sieve residue is 11%; sodium hydroxide is industrial grade, with an effective content of 99%; the solid content of water glass is 27%, and the modulus is 3.5.

[0020] The ratio of materials by mass is: 60 parts of slag, 70 parts of fly ash, 10 parts of sodium hydroxide, 2 parts of water glass, and water-solid ratio of 0.30; according to the method of the present invention, the slurry is poured into shape, and the test block is at normal temperature. After curing for 28 days, dry, crush, and then grind to make gypsum retarder (its specific surface area is 428m 2 / kg).

Embodiment 2

[0022] The specific surface area of ​​slag is 312m 2 / kg; the loss on ignition of fly ash is 4.3%, and its 0.08mm square hole sieve residue is 14%; sodium hydroxide is industrial grade, with an effective content of 99%; the solid content of water glass is 30%, and the modulus is 2.7.

[0023] According to the mass ratio of materials: 75 parts of slag, 40 parts of fly ash, 7 parts of sodium hydroxide, 4 parts of water glass, water-solid ratio 0.28; according to the method of the present invention, the slurry is poured into shape, and the test block is at normal temperature. After curing for 28 days, dry, crush, and then grind to make gypsum retarder (its specific surface area is 371m 2 / kg).

Embodiment 3

[0025] The specific surface area of ​​slag is 436m 2 / kg; the loss on ignition of fly ash is 9.6%, and its 0.08mm square hole sieve residue is 23%; sodium hydroxide is industrial grade, with an effective content of 99%; the solid content of water glass is 25%, and the modulus is 3.1.

[0026] According to the mass ratio of materials: 90 parts of slag, 50 parts of fly ash, 5 parts of sodium hydroxide, 5 parts of water glass, and water-solid ratio of 0.26; according to the method of the present invention, the slurry is poured into shape, and the test block is at normal temperature. After curing for 28 days, dry, crush, and then grind to make gypsum retarder (its specific surface area is 316m 2 / kg).

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
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing a calcium sulphate retarder from inorganic materials, such as coal ashes and slag. The method specifically comprises the steps of mixing the coal ashes, the slag, sodium hydroxide, water glass and water evenly, and then carrying out pouring and molding; and drying, crushing and grinding after curing to prepare an inorganic retarder. The obtained retarder is capable of effectively adjusting the setting time of a gypsum material, and has a relatively small influence on the strength of the gypsum material; and meanwhile, the preparation method is low in production cost and wide in material source, a lot of industrial waste residues can be consumed, and the pollution of long-term stacking of a lot of waste residues to the environment is reduced.

Description

technical field [0001] The invention relates to a preparation method of an inorganic gypsum retarder. The obtained retarder can adjust the setting time of building gypsum and meet the construction requirements of gypsum building material products. Background technique [0002] Gypsum is a building material with many excellent characteristics, such as good volume stability, light weight, fire prevention, sound insulation, heat preservation, earthquake resistance, radiation protection, etc., can make the surface of hardened body smooth, does not crack when dry, good decoration, and can be processed Good performance, low production energy consumption and other advantages. [0003] Gypsum is widely used in plastering gypsum, plastering gypsum, gypsum mortar, gypsum blocks, various gypsum wallboards, ceilings, decorative sound-absorbing panels and other decorative parts and other products. In practical application, the setting time of gypsum material is short after mixing with w...

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): C04B22/08C04B103/22
CPCC04B40/0046C04B2103/22C04B18/141C04B18/08C04B22/062C04B12/04
Inventor 陈雄木赵风清刘满超冯艳超刘少杰李超刘鑫丽赵阳阳
Owner HEBEI UNIVERSITY OF SCIENCE AND 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