A kind of highly thixotropic 3D printing cement-based material and its preparation method and application

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

Active Publication Date: 2022-03-01
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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  • A kind of highly thixotropic 3D printing cement-based material and its preparation method and application

Examples

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Effect test

no. 1 example

[0046] 1. A method for preparing a porous biomass carbon material, comprising the steps of:

[0047] (1) Dry 500 grams of corn stalks in an oven for 12 hours at 60°C.

[0048] (2) Grinding the dried corn stalks in a grinder for 30 minutes to obtain straw debris, soaking the straw debris in 1M hydrochloric acid for 30 minutes, and 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.

[0049] (3) Mix the pretreated straw scraps obtained in step (2) with papermaking lime mud evenly at a mass ratio of 5:1, place them in a tube furnace, and then calcine them in a nitrogen atmosphere for 2 hours. The calcination temperature is controlled at 730±2 °C to obtain biomass porous carbon.

[0050] (4) Place the biomass carbon material obtained in step (3) in hydrofluoric acid with a mass concentration of 18%, heat it in a...

no. 2 example

[0056] 1. A method for preparing a porous biomass carbon material, comprising the steps of:

[0057] (1) Dry 500 grams of corn stalks in an oven for 14 hours at a drying temperature of 50°C.

[0058] (2) Grinding the dried corn stalks in a grinder for 28 minutes to obtain straw debris, soaking the straw debris in 1M hydrochloric acid for 25 minutes, and 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.

[0059] (3) Mix the pretreated straw scraps obtained in step (2) with papermaking lime mud evenly at a mass ratio of 5:1.2, place them in a tube furnace, and then calcine them in a nitrogen atmosphere for 1 hour. The calcination temperature is controlled at 800±2 °C to obtain porous carbon.

[0060] (4) Place the porous carbon obtained in step (3) in hydrofluoric acid with a mass concentration of 20%, heat ...

no. 3 example

[0066] 1. A method for preparing a porous biomass carbon material, comprising the steps of:

[0067] (1) Dry 500 grams of wheat straw in an oven for 8 hours at 65°C.

[0068] (2) Grinding the dried corn stalks in a grinder for 35 minutes to obtain straw debris, soaking the straw debris in 1M hydrochloric acid for 35 minutes, and 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.

[0069] (3) Mix the pretreated straw scraps obtained in step (2) with papermaking lime mud evenly at a mass ratio of 5:1.5, place them in a tube furnace, and then calcinate them in a nitrogen atmosphere for 2 hours. The calcining temperature is controlled at 750±2 °C to obtain porous carbon.

[0070] (4) Place the porous carbon obtained in step (3) in hydrofluoric acid with a mass concentration of 5%, heat it in a water bath for 35...

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Abstract

The invention relates to a highly thixotropic 3D printing cement-based material and its preparation method and application. In parts by weight, the raw materials of the cement-based material include the following components: 65-100 parts of composite gelling components, 0.1-0.4 parts of porous carbon material, 1-3 parts of expanded perlite, 20-40 parts of quartz sand, 0.5-1.5 parts of thickener, 0.4-1.2 parts of water reducer, 30-50 parts of water. The present invention uses a composite cementitious material composed of silicate and sulphoaluminate cement, a porous carbon material, and an admixture to coordinately regulate the extrudability and mechanical properties of 3D printing cement-based materials, so that the highly thixotropic 3D Printing cement-based materials can well meet the continuity and extrusion necessary for 3D printing, so as to obtain the low deformation and high mechanical properties necessary for 3D printing, not only can make 3D printing cement-based materials have good thixotropy, print structure stable and improve its mechanical properties.

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 Patents(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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