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Gypsum-based mortar and preparation method thereof

A technology of gypsum and gypsum clinker, which is applied in the direction of additive processing, etc., can solve the problems of high quality requirements for gypsum-based materials and easy collapse of printing materials, so as to increase the coating rate, improve crack resistance, improve durability and The effect of construction performance

Pending Publication Date: 2022-01-21
BEIJING NEW BUILDING MATERIALS PLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This application provides a gypsum-based dry-mix mortar for 3D printing, which not only solves the problem that the printing materials such as concrete materials or clay materials currently used in 3D printing technology are easy to collapse, but also solves the problem that ordinary gypsum-based mortar has a negative effect on gypsum-based materials. Questions with higher quality requirements

Method used

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  • Gypsum-based mortar and preparation method thereof
  • Gypsum-based mortar and preparation method thereof
  • Gypsum-based mortar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Mix 100kg of sulfur-containing coal and 1.74kg of calcium carbonate uniformly to make briquettes, and to form coal ash after fully burning at 1200°C. The main chemical components are determined as follows:

[0060]

[0061] Pulverize the coal ash to 80 mesh.

[0062] (2) Calcining low-quality desulfurized gypsum to prepare low-quality gypsum clinker (the prepared clinker is β-type hemihydrate gypsum), and the dihydrate gypsum content (DH) in the aged low-quality desulfurized clinker is 1.6wt.%. , anhydrous gypsum (AⅢ) is 1.3wt.%; Grinding, sealing for subsequent use, obtaining particle size is 200 orders, and D50 is the low-quality gypsum clinker of 40 μm to 50 μm;

[0063] (3) 100kg of low-quality gypsum clinker powder prepared in step (2), 0.5kg of zeolite powder and 10kg of prepared coal ash slag were mixed uniformly to obtain mixture 1;

[0064] (4) Test the standard consistency water consumption of the mixed powder (the mixture obtained by mixing 100kg of l...

Embodiment 2

[0069] The difference between embodiment 2 and embodiment 1 lies in step (3). Step (3): 100kg of gypsum powder prepared in step (1), 0.5kg of zeolite powder and 15kg of prepared coal ash are mixed evenly;

Embodiment 3

[0071] The difference between embodiment 2 and embodiment 1 lies in step (3). Step (3): 100kg of gypsum powder prepared in step (1), 0.5kg of zeolite powder and 5kg of prepared coal ash are mixed evenly;

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Abstract

The invention provides a gypsum-based mortar and a preparation method thereof. The gypsum-based dry-mixed mortar material comprises low-quality gypsum clinker, coal ash slag, zeolite and quick lime. According to the gypsum-based dry-mixed mortar material provided by the invention, the problem that a product is easy to collapse in a printing process when the product with a relatively high height (more than 2cm) is printed by using a printing material such as a concrete material or clay in a current 3D printing technology is effectively solved; and the gypsum-based mortar provided by the invention is beneficial to improving the durability and construction performance of the gypsum-based mortar.

Description

technical field [0001] This article relates to but not limited to the technical field of new building materials, especially to but not limited to a gypsum-based mortar for 3D printing and its preparation method. Background technique [0002] Three-dimensional (Three Dimensions, 3D) printing materials are an important material basis for the development of 3D printing technology. To some extent, the development of materials determines whether 3D printing can be more widely used. Gypsum is an air-hardening cementitious material with micro-expansion, smooth surface, fine texture and good processability. After adding some modified additives, gypsum powder can be used as a molding material for 3D printers. It can be quickly solidified under the action of water-based ink and has a certain strength. Compared with other 3D printing materials, gypsum cementitious materials and their products have many excellent properties, such as fast setting and hardening, fine particles, and easy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14B33Y70/10
CPCC04B28/14B33Y70/10C04B2201/50C04B2201/32C04B2111/00181C04B14/047C04B18/103C04B2103/302C04B2103/465C04B24/026
Inventor 杨正波王丽陈红霞刘文君冉秀云
Owner BEIJING NEW BUILDING MATERIALS PLC