Rapidly calcined lightweight plastering gypsum and preparation method thereof

A plastering gypsum and calcining technology, which is applied in the field of rapid calcination of light plastering gypsum and its preparation, can solve the problems of low strength, cracking and the like, and achieves the improvement of coating rate, overcoming easy cracking, high coating rate and construction effect. Effect

Active Publication Date: 2022-04-05
TAISHAN GYPSUM CO LTD
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fast calcined lightweight plastering gypsum provided by the invention can improve the spreading rate and overcome the problems of cracking and low strength after construction

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
  • Rapidly calcined lightweight plastering gypsum and preparation method thereof
  • Rapidly calcined lightweight plastering gypsum and preparation method thereof
  • Rapidly calcined lightweight plastering gypsum and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] The present invention also provides a method for preparing the fast-calcined lightweight plastering gypsum described in the above technical solution, comprising:

[0042] Mix modified gypsum powder, vitrified microbeads, heavy calcium carbonate, retarder, hydroxypropyl methylcellulose ether, starch ether, tackifier, bentonite and air-entraining agent to obtain fast calcined lightweight plaster plaster.

[0043] In the present invention, the order of mixing materials is preferably: first stir and mix the modified gypsum powder and retarder, then add heavy calcium carbonate, air-entraining agent, bentonite, tackifier, starch ether and hydroxypropyl methyl The cellulose ether is stirred and mixed, and finally vitrified microbeads are added and stirred and mixed to obtain a fast calcined light plastering gypsum.

[0044] In the present invention, the above-mentioned mixing step is preferably carried out in a mixer, and the stirring rate during the mixing process is prefera...

Embodiment 1

[0047] 1.1 Raw material

[0048]

[0049]

[0050] in:

[0051] Modified gypsum powder specifications: temperature 48°C, fineness 60-120 mesh, loose bulk density 670g / L; three-phase composition: residual dihydrate gypsum content 2.48%, anhydrous gypsum content 2.83%, hemihydrate gypsum content 76.42% . Obtained in the following manner: high-temperature rapid calcined gypsum powder (temperature 590-600° C.) is obtained through cyclic cooling, homogenization and aging treatment.

[0052] Vitrified microbeads are: spherical closed-cell expanded perlite, loose bulk density 119g / L, fineness 30-90 mesh, fineness modulus 2.2, water sinking rate 4%, cylinder compressive strength 160kPa.

[0053] Heavy calcium carbonate: fineness 325 mesh, loose bulk density 950g / L.

[0054] Hydroxypropyl methyl cellulose ether: viscosity is 60000mPa.s.

[0055] Retarder: Suzhou Xingbang SG-12 efficient retarder.

[0056] 1.2 Preparation:

[0057] Weigh the retarder SG-12 by micrometering, ...

Embodiment 2

[0059] 1.1 Raw material

[0060]

[0061] in:

[0062] Modified gypsum powder specifications: temperature 49°C, fineness 50-120 mesh, loose bulk density 670g / L; three-phase composition: residual dihydrate gypsum content 2.92%, anhydrous gypsum content 2.95%, hemihydrate gypsum content 79.31% . Obtained in the following manner: high-temperature rapid calcined gypsum powder (temperature 630-650° C.) is obtained through cyclic cooling, homogenization and aging treatment.

[0063] Vitrified microbeads are: spherical closed-cell expanded perlite, loose bulk density 119g / L, fineness 30-90 mesh, fineness modulus 2.2, water sinking rate 4%, cylinder compressive strength 160kPa.

[0064] Heavy calcium carbonate: fineness 325 mesh, loose bulk density 950g / L.

[0065] Hydroxypropyl methyl cellulose ether: viscosity is 60000mPa.s.

[0066] Retarder: Suzhou Xingbang SG-12 efficient retarder.

[0067] 1.2 Preparation:

[0068] Weigh the retarder SG-12 by micrometering, and add it a...

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
flexural strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to view more

Abstract

The invention provides rapidly calcined lightweight plastering gypsum and a preparation method thereof. The rapidly calcined lightweight plastering gypsum provided by the invention is prepared from the following raw materials in parts by mass: 85-95 parts of modified gypsum powder; 6 to 12 parts of glass beads; 0.5-5 parts of heavy calcium carbonate; 0.2 to 0.5 part of a retarder; 0.2 to 0.3 part of hydroxypropyl methyl cellulose ether; 0 to 0.2 part of starch ether; 0 to 0.5 part of a tackifier; 0.5 to 1 part of bentonite; and 0.02 to 0.5 part of an air entraining agent. The light plastering gypsum product is prepared by matching certain modified gypsum powder with the specific water-retaining agent, the retarder and other components according to a certain proportion, so that the coating rate can be increased (greater than 130m < 2 >/ton), and the problems of easiness in cracking, low strength and powder falling after construction are solved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a fast-calcined lightweight plastering gypsum and a preparation method thereof. Background technique [0002] Plastering gypsum is a high-efficiency and energy-saving plastering material for interior walls and ceilings of buildings, which is processed with gypsum as the main cementitious material, sand, certain admixtures and special compound additives. It is widely used for interior walls and roofs. Leveling and decoration. In modern construction projects, plastering gypsum mainly replaces plastering materials such as cement, lime mortar and clay mortar, and is used for various walls. Compared with other plastering mortars, plastering gypsum has good workability, fluidity and water retention properties, good thermal insulation and sound insulation properties, appropriate fire performance, dense and flat wall surface, and can be bonded to any substrate , can adjust the indoor ...

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): C04B28/14C04B111/34
CPCY02W30/91
Inventor 任利张军兴高甲明赵合军
Owner TAISHAN GYPSUM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap