Functional gradient and density gradient concrete material for 3D printing and preparation method thereof

A technology of density gradient and functional gradient, which is applied in the field of preparing a 3D printing concrete material with functional gradient and density gradient, can solve the problems of weak interactive coordination of nozzles, poor individual versatility, weak component interaction, etc., and achieve improvement Habitat comfort, self-weight reduction, and the effect of reducing the overall self-weight

Active Publication Date: 2018-01-09
NANJING UNIV OF SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the existing 3D printing concrete technologies use a single nozzle to print a single, homogeneous concrete material in sections or in modules, so the printed concrete components generally have self-heaviness, poor individual versatility, and long-term preparation of a single component. Disadvantages such as weak interaction and coordination between nozzles
In the field of housing construction, the currently printed concrete has prominent problems such as poor living comfort and weak interaction between the interior of the component and the external environment.

Method used

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  • Functional gradient and density gradient concrete material for 3D printing and preparation method thereof
  • Functional gradient and density gradient concrete material for 3D printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Weigh 48.7% of yellow sand, 16.8% of Portland cement, and 24.6% of first-grade fly ash into a mixer. After stirring for 3 to 5 minutes, mix 9.5% of water and 0.38% of polycarboxylic acid-based high-efficiency water-reducing agent and 0.02% antifoaming agent, slowly pour the mixed solution into the evenly stirred powder, and the formed slurry is the first gradient layer material of the density gradient layer; weigh 33.7% yellow sand, 16.8% silicon Salt cement, 24.6% of primary fly ash are put into the mixer, and after stirring for 3-5 minutes, 9.5% of water, 0.38% of polycarboxylate superplasticizer and 0.02% of defoamer are configured. Slowly pour the mixed solution into the evenly stirred powder. After the slurry is formed, pour 15% of the first-grade fly ash ceramsite into the mixer and stir for 3 minutes to obtain the second gradient layer material of the density gradient layer; then weigh 12.7 % of yellow sand, 16.8% of Portland cement, and 24.6% of primary fly ash ...

Embodiment 2

[0068] Weigh 48.7% of yellow sand, 16.8% of Portland cement, and 24.6% of finely ground blast furnace slag into a mixer, and after stirring for 3 to 5 minutes, mix 9.5% of water and 0.38% of polycarboxylate superplasticizer and 0.02% antifoaming agent, slowly pour the mixed solution into the evenly stirred powder, and the formed slurry is the first gradient layer material of the density gradient layer; weigh 30.7% yellow sand, 16.8% silicic acid Put salt cement and 24.6% finely ground blast furnace slag into a mixer, stir for 3 to 5 minutes, then mix 9.5% water, 0.38% polycarboxylate superplasticizer and 0.02% defoamer to prepare a mixed solution Slowly pour into the evenly stirred powder, and after the slurry is formed, pour 18% of the high-strength shale ceramsite into the mixer and stir for 3 minutes to obtain the second gradient layer material of the density gradient layer; then weigh 12.7% of yellow sand, Put 16.8% Portland cement and 24.6% finely ground blast furnace sla...

Embodiment 3

[0072] Weigh 48.7% of yellow sand, 16.8% of Portland cement, and 24.6% of silica fume into a mixer, stir for 3 to 5 minutes, mix 9.5% of water, 0.38% of polycarboxylate superplasticizer and Slowly pour the mixed solution of 0.02% defoamer into the evenly stirred powder, and the formed slurry is the first gradient layer material of the density gradient layer; weigh 26.7% yellow sand, 16.8% silicate Put cement and 24.6% microsilica fume into the mixer, and after stirring for 3 to 5 minutes, slowly pour the mixed solution of 9.5% water, 0.38% polycarboxylate superplasticizer and 0.02% defoamer Pour 22% of the high-strength clay ceramsite into the mixer after the slurry is formed and stir for 3 minutes to obtain the second gradient layer material of the density gradient layer; then weigh 12.7% of the yellow sand, 16.8% of the Put Portland cement and 24.6% microsilica fume into a mixer, stir for 3 to 5 minutes, then mix with 9.5% water, 0.38% polycarboxylate superplasticizer and 0....

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Abstract

The invention discloses a functional gradient and density gradient concrete material for 3D printing and a preparation method thereof. The material consists of a density gradient layer and a thermal insulation layer, and is prepared from lightweight ceramsite aggregate, a thermal insulation material, cement, industrial waste residue, fine aggregate, a defoamer, a superplasticizer and water. According to the concrete material prepared with the method, the comfort of 3D printed concrete is greatly improved, self-weight is reduced and the interaction of the concrete material with external environments is enhanced.

Description

technical field [0001] The invention relates to a 3D printing concrete material and a preparation method thereof, in particular to preparing a 3D printing concrete material with a functional gradient and a density gradient. Background technique [0002] 3D printing technology originated at the end of the 19th century, realized and developed rapidly in the 1980s. After more than 30 years of development, 3D printing technology has gradually matured, and its process cost has been greatly reduced. Now it is widely used in the fields of biomedicine, aerospace, mold manufacturing, electronic information and automobile manufacturing. [0003] In the field of building materials, 3D printing concrete is a research hotspot that has attracted much attention in recent years. The main principle of 3D printing concrete technology is to use the computer to carry out 3D modeling of concrete components and obtain the three-dimensional information of the components, and then pass the prepare...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04B33Y70/00
Inventor 赖建中郑晓博王强杨浩若杨继全乔羽谭诚杨晓玉张跃林
Owner NANJING UNIV OF SCI & TECH
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