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Cement-based composite slurry for 3D printing and preparation method thereof

A 3D printing and composite slurry technology, applied in the direction of additive processing, etc., can solve the problems affecting the volume stability and durability of 3D printing components, the printing materials are prone to collapse, and the material fluidity is poor, so as to improve toughness and prevent aggregation , enhance the effect of anti-cracking performance

Pending Publication Date: 2021-09-17
成都典弥霖建筑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 3D printing cement material currently used has some disadvantages, mainly in: low early strength: long setting time, poor material fluidity, not easy to cohere and other shortcomings, which lead to problems such as collapse and deformation after the printed material is placed In the later stage of hydration, shrinkage cracks are caused due to the volume shrinkage of hardened cement paste, which affects the volume stability and durability of 3D printed components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) In parts by weight, the following raw materials are included: 20-40 parts of zirconia ceramic whiskers with an average diameter of 40-80 μm, 5-10 parts of vinyltriethoxysilane, and 100-200 parts of absolute ethanol.

[0034] Add zirconia ceramic whiskers and vinyl triethoxysilane to absolute ethanol, place in an ultrasonic disperser, ultrasonically treat for 30-40min at a frequency of 20-40kHz and a power of 400-600W, filter, and dry , to obtain modified zirconia ceramic whiskers.

[0035] Then weigh 10-20 parts of boron carbide ceramic whiskers with an average diameter of 40-60 μm, 5-10 parts of ethyl orthosilicate, 20-40 parts of ammonia water with a mass fraction of 10%, and 40-60 parts by weight. Parts absolute ethanol.

[0036] Add boron carbide ceramic whiskers to absolute ethanol, and ultrasonically disperse for 20-30min at room temperature with a frequency of 20-30kHz and a power of 300-400W to obtain a dispersion;

[0037] (2) Add ammonia water to the dis...

Embodiment 2

[0042] (1) In parts by weight, the following raw materials are included: 20-40 parts of zirconia ceramic whiskers with an average diameter of 40-80 μm, 5-10 parts of vinyltriethoxysilane, and 100-200 parts of absolute ethanol.

[0043] Add zirconia ceramic whiskers and vinyl triethoxysilane to absolute ethanol, place in an ultrasonic disperser, ultrasonically treat for 30-40min at a frequency of 20-40kHz and a power of 400-600W, filter, and dry , to obtain modified zirconia ceramic whiskers.

[0044]Then weigh 10-20 parts of boron carbide ceramic whiskers with an average diameter of 40-60 μm, 5-10 parts of ethyl orthosilicate, 20-40 parts of ammonia water with a mass fraction of 10%, and 40-60 parts by weight. Parts absolute ethanol.

[0045] Add boron carbide ceramic whiskers to absolute ethanol, and ultrasonically disperse for 20-30min at room temperature with a frequency of 20-30kHz and a power of 300-400W to obtain a dispersion;

[0046] (2) Add ammonia water to the disp...

Embodiment 3

[0051] (1) In parts by weight, the following raw materials are included: 20-40 parts of zirconia ceramic whiskers with an average diameter of 40-80 μm, 5-10 parts of vinyltriethoxysilane, and 100-200 parts of absolute ethanol.

[0052] Add zirconia ceramic whiskers and vinyl triethoxysilane to absolute ethanol, place in an ultrasonic disperser, ultrasonically treat for 30-40min at a frequency of 20-40kHz and a power of 400-600W, filter, and dry , to obtain modified zirconia ceramic whiskers.

[0053] Then weigh 10-20 parts of boron carbide ceramic whiskers with an average diameter of 40-60 μm, 5-10 parts of ethyl orthosilicate, 20-40 parts of ammonia water with a mass fraction of 10%, and 40-60 parts by weight. Parts absolute ethanol.

[0054] Add boron carbide ceramic whiskers to absolute ethanol, and ultrasonically disperse for 20-30min at room temperature with a frequency of 20-30kHz and a power of 300-400W to obtain a dispersion;

[0055] (2) Add ammonia water to the dis...

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PUM

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Abstract

The invention discloses a cement-based composite slurry for 3D printing. The cement-based composite slurry comprises 30-50 parts of Portland cement, 8-12 parts of ceramic foundry sand, 6-8 parts of modified zirconia ceramic whisker, 4-6 parts of modified boron carbide ceramic whisker, 10-20 parts of polyurethane modified epoxy resin emulsion, 0.2-0.4 part of sodium lignin sulfonate, 1-2 parts of polysilazane, and 20-40 parts of deionized water. The invention also discloses a preparation method of the cement-based composite slurry for 3D printing. The preparation method comprises the following steps: (1) adding polyurethane modified epoxy resin emulsion and polysilazane into water, and stirring and mixing to obtain a mixed emulsion; and (2) adding Portland cement, ceramic foundry sand, modified zirconia ceramic whiskers, modified boron carbide ceramic whiskers and sodium lignin sulfonate into the mixed emulsion, and stirring and mixing to obtain the cement-based composite slurry for 3D printing.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a cement-based composite slurry for 3D printing and a preparation method thereof. Background technique [0002] With the continuous improvement of science and technology, 3D printing technology is rapidly changing people's production and lifestyle. In the construction industry, the "contour process" of 3D printing technology is applied. According to the instructions of the design drawing, the nozzle extrudes the building material at the designated location, and the object is constructed by printing layer by layer. Cement is a hydraulic cementitious material and one of the most important building materials in construction engineering. It is mainly used to prepare concrete, mortar and grouting materials. The emergence of 3D printing cement makes 3D printing technology more mature and convenient, and it is also safer to be used in construction printing. The 3D printing ...

Claims

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Application Information

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IPC IPC(8): C04B28/04B33Y70/10C04B20/10C04B14/38
CPCC04B28/04B33Y70/10C04B20/1051C04B20/1066C04B2111/00181C04B2201/50C04B2201/52C04B18/027C04B14/383C04B24/281C04B24/282C04B24/18C04B24/42
Inventor 谭祖柒
Owner 成都典弥霖建筑科技有限公司
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