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Composite absorbing material based on 3D printing and its application

A composite wave absorbing material and printing material technology, applied in the field of building materials, can solve the problems of destroying collective tissue, inconvenient to use mold forming, and high requirements, and achieve the effect of ensuring wave absorption effect and strength.

Active Publication Date: 2022-05-17
北京三帝科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Architectural absorbing materials are mostly made of cement-based materials, gypsum-based materials, etc. with added absorbing agents, which are low in cost, adjustable in performance, and good in absorbing effects, but usually require templates for molding, which has high requirements for templates, and special-shaped templates The cost of mold opening is high, and it is inconvenient to use mold molding when the amount of material is small
[0003] 3D printing can solve the forming problem of absorbing materials, making the macro structure adjustable and more flexible in production and construction; however, the addition of a large amount of absorbing agents makes the 3D printing materials unable to produce sufficient strength, and the absorbing agents destroy the collective organization, resulting in The strength drops sharply, affecting the use

Method used

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  • Composite absorbing material based on 3D printing and its application
  • Composite absorbing material based on 3D printing and its application
  • Composite absorbing material based on 3D printing and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Take sludge power generation fly ash and ash, and XRD method to detect its composition, the results are shown in Table 1.

[0069] Table 1

[0070]

[0071] The electromagnetic parameters of sludge power generation fly ash were detected by the coaxial method. The mass content of fly ash and paraffin in the test sample was 50%. The results are as follows: figure 1 shown. Except for the 12.5-15GHz frequency band, the imaginary part of the permittivity is basically between 0.2-0.3, and the imaginary part of the magnetic permeability is basically 0. There is a certain dielectric loss performance in this frequency band; in the 12.5-15GHz frequency band, the dielectric constant Both the magnetic permeability and the magnetic permeability have great changes, especially the imaginary part of the magnetic permeability, which has increased significantly, indicating that there is a more obvious magnetic loss characteristic in this frequency band.

Embodiment 2

[0073] Composite absorbing materials based on 3D printing, including: PO42.5 ordinary portland cement 60 parts, sludge power plant fly ash 10, 20, 40 parts, quartz sand 60 parts, polycarboxylate superplasticizer 0.6 parts , 20 parts of water.

[0074] Shaped to 40*40*160mm 3 The triple module test block.

[0075] Test the compressive performance of triple mold test blocks 7d and 28d, the results are as follows figure 2 shown.

[0076] With the increase of the fly ash content of the sludge power plant, the mechanical strength of the material decreases, and the cover time needs to be extended. The fly ash content of the sludge power plant is less than 40 parts, which can better maintain the required strength.

Embodiment 3

[0078] Composite absorbing materials based on 3D printing, including main printing materials and auxiliary printing materials;

[0079] The main printing material comprises the following components by weight:

[0080] PO42.5 ordinary Portland cement 70 parts, sulphoaluminate cement 10 parts, silica fume 10 parts, sludge power plant fly ash 10 parts, quartz sand 120 parts, polycarboxylate superplasticizer 1 part, water 30 parts, 1.5 parts of carbon black.

[0081] The secondary printing material comprises the following components in parts by weight:

[0082] 95 parts of epoxy resin, 10 parts of carbon black.

[0083] Use the following printheads to print composite absorbers:

[0084] Such as Figure 3-7 As shown, the print head includes a main extrusion head 1 and a sub-extrusion head assembly;

[0085] The top of the main extrusion head 1 is the main feed port, the bottom is the main extrusion port, and the main feed port is connected to the main extrusion port; the side ...

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Abstract

The invention discloses a composite wave-absorbing material based on 3D printing and its application, and belongs to the technical field of building materials; the composite wave-absorbing material based on 3D printing includes a main printing material; the main printing material includes the following components by weight: ordinary silicate 30-90 parts of cement, 0-20 parts of sulphoaluminate cement, 0-20 parts of fly ash, 0-20 parts of silica fume, 5-60 parts of solid waste from sludge power plants, 60-200 parts of quartz sand or river sand 0-50 parts of wave-absorbing aggregate, 0.3-5 parts of water reducing agent, 20-50 parts of water, 0-3 parts of flexible chopped fiber, and 0-30 parts of wave absorbing agent. The present invention uses power plant fly ash and tailings to replace part or all of the wave absorbing agent, which can simultaneously ensure the wave absorbing effect and mechanical strength of the 3D printed composite wave absorbing material.

Description

technical field [0001] The present invention relates to the technical field of building materials, and more specifically relates to a composite absorbing material based on 3D printing and its preparation and application. Background technique [0002] Architectural absorbing materials are mostly made of cement-based materials, gypsum-based materials, etc. with added absorbing agents, which are low in cost, adjustable in performance, and good in absorbing effects, but usually require templates for molding, which has high requirements for templates, and special-shaped templates The cost of mold opening is high, and it is inconvenient to use mold molding when the amount of material is small. [0003] 3D printing can solve the forming problem of absorbing materials, making the macro structure adjustable and more flexible in production and construction; however, the addition of a large amount of absorbing agents makes the 3D printing materials unable to produce sufficient strength...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B28/06B33Y70/10
CPCC04B28/04C04B28/06B33Y70/10C04B2111/00258C04B2111/00181C04B18/08C04B14/06C04B2103/302C04B7/02C04B18/146C04B14/022C04B24/281C04B14/024C04B14/026C04B18/22C04B14/185C04B2103/0068Y02W30/91
Inventor 李彬刘明朗袁晓鑫赵浩陈庆文
Owner 北京三帝科技股份有限公司
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