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High-thixotropy 3D printing cement-based material and preparation method and application thereof

A cement-based material, 3D printing technology, applied in carbon preparation/purification, chemical instruments and methods, additive processing, etc., can solve the problem of affecting mechanical properties, poor early mechanical properties, and poor matching between printing materials and extrusion devices and other problems, to achieve the effect of improving mechanical properties, low deformation mechanical properties, and stable printing structure

Active Publication Date: 2020-12-25
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the poor rheological properties and early mechanical properties of the current traditional cement-based materials during 3D printing, the matching performance of the printing material and the extrusion device is poor, and the thixotropic paste will affect the mechanical properties of the printed solid structure, etc. Insufficient aspects make it difficult for traditional cement-based materials to be practically applied in 3D printing technology

Method used

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  • High-thixotropy 3D printing cement-based material and preparation method and application thereof
  • High-thixotropy 3D printing cement-based material and preparation method and application thereof
  • High-thixotropy 3D printing cement-based material and preparation method and application thereof

Examples

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Effect test

no. 1 example

[0047] 1. A method for preparing a porous biomass carbon material, comprising the steps of:

[0048] (1) Dry 500 grams of corn stalks in an oven for 12 hours at a drying temperature of 60°C.

[0049] (2) Grinding the dried corn stalks in a pulverizer for 30 minutes to obtain straw debris, soaking the straw debris in 1M hydrochloric acid for 30 minutes, then washing the straw debris with deionized water to remove residual hydrochloric acid, After washing, the straw chips were dried in an oven for 6 hours at a drying temperature of 60° C. to obtain pretreated straw chips.

[0050] (3) Mix the pretreated straw debris obtained in step (2) with the papermaking lime mud according to the mass ratio of 5:1, place it in a tube furnace, and then calcinate it in a nitrogen atmosphere for 2 hours. The calcining temperature is controlled at 730±2 °C to obtain biomass porous carbon.

[0051] (4) placing the biomass carbon material obtained in step (3) in hydrofluoric acid with a mass conc...

no. 2 example

[0057] 1. A method for preparing a porous biomass carbon material, comprising the steps of:

[0058] (1) 500 grams of corn stalks were dried in an oven for 14 hours at a drying temperature of 50°C.

[0059] (2) Grinding the dried corn stalks in a pulverizer for 28 minutes to obtain straw debris, soaking the straw debris in 1M hydrochloric acid for 25 minutes, then washing the straw debris with deionized water to remove residual hydrochloric acid, After washing, the straw chips were dried in an oven for 7 hours at a drying temperature of 60° C. to obtain pretreated straw chips.

[0060] (3) Mix the pretreated straw debris obtained in step (2) with the papermaking lime mud according to the mass ratio of 5:1.2, place it in a tube furnace, and then calcinate it in a nitrogen atmosphere for 1 hour. The calcining temperature is controlled at 800 ± 2 °C to obtain porous carbon.

[0061] (4) the porous carbon obtained in step (3) is placed in hydrofluoric acid with a mass concentrat...

no. 3 example

[0067] 1. A method for preparing a porous biomass carbon material, comprising the steps of:

[0068] (1) Dry 500 grams of wheat straw in an oven for 8 hours at a drying temperature of 65°C.

[0069] (2) Grinding the dried corn stalks in a pulverizer for 35 minutes to obtain straw debris, soaking the straw debris in 1M hydrochloric acid for 35 minutes, then washing the straw debris with deionized water to remove residual hydrochloric acid, After washing, the straw chips were dried in an oven for 5 hours at a drying temperature of 70° C. to obtain pretreated straw chips.

[0070] (3) Mix the pretreated straw debris obtained in step (2) with the papermaking lime mud according to the mass ratio of 5:1.5, place it in a tube furnace, and then calcinate it in a nitrogen atmosphere for 2 hours. The calcining temperature is controlled at 750±2 °C to obtain porous carbon.

[0071] (4) placing the porous carbon obtained in step (3) in hydrofluoric acid with a mass concentration of 5%, ...

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Abstract

The invention relates to a high-thixotropy 3D printing cement-based material and a preparation method and application thereof. Raw materials of the cement-based material comprise the following components in parts by weight: 65-100 parts of a composite cementing component, 0.1-0.4 part of a porous carbon material, 1-3 parts of expanded perlite, 20-40 parts of quartz sand, 0.5-1.5 parts of a thickening agent, 0.4-1.2 parts of a water reducing agent and 30-50 parts of water. According to the high-thixotropy 3D printing cement-based material, the composite cementing material composed of silicate and sulphoaluminate cement, the porous carbon material and the additive are adopted to cooperatively regulate and control the extrudability and mechanical properties of the 3D printing cement-based material so that the high-thixotropy 3D printing cement-based material provided by the invention can well meet the continuity and the extrudability necessary for 3D printing; therefore, low deformation and high mechanical properties necessary for 3D printing are obtained, the thixotropy of the 3D printing cement-based material is good, the printing structure is stable, and the mechanical properties can be improved.

Description

technical field [0001] The invention relates to the technical field of 3D printing cement-based materials, in particular to a highly thixotropic 3D printing cement-based material and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] 3D printing construction technology is a rapid prototyping technology that builds three-dimensional structures through pumping or extrusion devices. Its advantages are: (1) fast construction speed and shortened construction period; (2) easy to build special-shaped structures, customized (3) Avoid dust and flying dust and protect the environment; (4) Do not require too much manpower and save costs. [0004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C01B32/05C01B32/16C01B32/198B33Y70/10B33Y10/00C04B14/02B33Y80/00
CPCC04B28/065C01B32/05C01B32/16C01B32/198B33Y70/10B33Y10/00C04B14/026B33Y80/00C04B2201/10C04B2201/50C04B7/02C04B14/062C04B14/06C04B22/002C04B2103/302C04B24/383C04B14/10C04B14/185
Inventor 芦令超陈明旭徐嘉宾赵丕琪黄永波
Owner UNIV OF JINAN
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