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Geopolymer composite material for 3D printing and its preparation method and use

A geopolymer and 3D printing technology, applied in the field of 3D printing materials, can solve the problems of no vertical accumulation performance, long setting time of concrete materials, and the inability to use existing materials, etc., and achieve the effect of low cost

Active Publication Date: 2018-07-31
CHINA STATE CONSTRUCTION ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a geopolymer composite material for 3D printing and its preparation method and application, to solve the problems of long setting time and no vertical accumulation performance of concrete materials in the existing 3D printing technology; Due to the limitations of cost, process and performance, existing materials cannot be really used in architectural 3D printing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Blast furnace quenched slag powder 25%; steel slag powder 10%; fly ash 5%; tailings machine-made sand 33%; sodium metasilicate 3.5%; sodium hydroxide 1.5%; polymer 3%; starch ether 0.2% 1% polyvinyl alcohol fiber; shrinkage reducing agent 1.8%; hydroxypropyl methylcellulose ether 0.3%; organic bentonite 1.7%; defoamer 0.1%; mixing water 13.9%.

[0057] The preparation method of the above-mentioned geopolymer composite material for 3D printing is as follows: the above powdery raw materials are pre-mixed, and after adding water and fully stirring, they can be used for pumping by the construction 3D printer, and the amount of stirring each time can be controlled according to the printing speed. Specific steps are as follows:

[0058] Step 1, preparing a composite activator: Weighing sodium metasilicate and sodium hydroxide in proportion and mixing them uniformly to prepare an activator for use;

[0059] Step 2, preparing a volume stabilizer: weighing starch ether, polyvin...

Embodiment 2

[0067] Blast furnace quenched slag powder 20%; steel slag powder 15%; fly ash 0%; tailings machine-made sand 45%; sodium metasilicate 2.2%; sodium hydroxide 0.8%; polymer 2.5%; starch ether 0.05% ; Polyvinyl alcohol fiber 0.5%; Shrinkage reducing agent 0.45%; Hydroxypropyl methyl cellulose ether 0.1; Machine bentonite 0.9%;

[0068] The specific implementation steps are the same as in Embodiment 1, and the amount of stirring each time can be controlled according to the printing speed.

[0069] The performance of the geopolymer composite material used for 3D printing in this embodiment is detected, and the results are as follows:

[0070] The initial setting time is 35 minutes, and the final time is 68 minutes;

[0071] Compressive strength R 1d =12.3MPa, R 7d =38.5MPa,R 28d =46.7MPa.

Embodiment 3

[0073] Blast furnace quenched slag powder 23%; steel slag powder 12%; fly ash 3%; tailings machine-made sand 39%; sodium metasilicate 3%; sodium hydroxide 1%; polymer 3%; starch ether 0.05% ; polyvinyl alcohol fiber 0.5%; shrinkage reducing agent 0.45%; hydroxypropyl methylcellulose ether 0.1%; machine bentonite 1.3%; defoamer 0.1%; mixing water 13.5%.

[0074] The specific implementation steps are the same as in Embodiment 1, and the amount of stirring each time can be controlled according to the printing speed.

[0075] The performance of the geopolymer composite material used for 3D printing in this embodiment is detected, and the results are as follows:

[0076] The initial setting time is 25 minutes, and the final time is 48 minutes;

[0077] Compressive strength R 1d =20.0MPa, R 7d =47.6MPa,R 28d =55.8MPa.

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Abstract

A geopolymer composite material for 3D printing and a preparation method and application thereof are disclosed. The geopolymer composite material comprises the following ingredients (by weight): 20-25% of water-quenched granulated blast furnace slag powder, 10-15% of ground steel slag, 0-5% of fly ash, 33-45% of tailings machine-made sand, 3-5% of a composite activator, 2.5-3% of a high-molecular polymer, 1-3% of a volume stabilizer, 1-2% of a thixotropic agent, 0.05-0.1% of an antifoaming agent and 13.9-12.45% of mixing water. The above ingredients are fully and uniformly stirred and then the mixture is subsequently pumped into a 3D printer for construction. The geopolymer composite material has good caking property, strong stability and has good pump-out morphology maintaining capability and bond property. Printed buildings have good morphology and volume stability, and houses and buildings have good overall stability and use security.

Description

technical field [0001] The invention relates to the technical field of 3D printing materials, in particular to a geopolymer composite material for 3D printing and its preparation method and application. Background technique [0002] Compared with traditional buildings, 3D printing construction technology has the advantages of fast speed, no need to use templates, and no need for a large number of construction workers, which can improve construction efficiency; 3D printing construction technology can easily print out buildings that are difficult to build in other ways. High cost curve construction. With the development of architectural 3D printing technology, it may have an impact on the future development of the construction industry and the concrete industry. At present, many institutions and units at home and abroad have or plan to use 3D printing technology to build houses and buildings. [0003] At present, 3D printing materials are mainly divided into four types, plas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/08B33Y70/00
CPCB33Y70/00C04B28/082C04B18/08C04B14/06C04B22/08C04B22/062C04B24/24C04B24/386C04B16/0641C04B2103/50C04B14/12C04B28/006C04B2111/00181Y02P40/10Y02W30/91C04B12/04C04B18/12C04B18/141C04B18/142
Inventor 蔺喜强李景芳张涛霍亮李国友张楠廖娟王宝华戢文占
Owner CHINA STATE CONSTRUCTION ENGINEERING CORPORATION
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