Alkali-activated cementing material for 3D printing and printing method of alkali-activated cementing material

A technology for 3D printing and cementing materials, applied in the field of alkali-excited cementitious materials and their preparation, can solve the problems of limiting the height of printing concrete, restricting the printing process, poor working performance, etc., and achieving rich printing raw materials, reducing dosage, and thermal stability. good effect

Active Publication Date: 2017-10-27
NANJING UNIV OF SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, alkali-activated gelling materials have fast coagulation speed, poor fluidity, and poor work performance, and 3D printing has high requirements for work performance, so the problem of using alkali-activated gelling materials for 3

Method used

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  • Alkali-activated cementing material for 3D printing and printing method of alkali-activated cementing material
  • Alkali-activated cementing material for 3D printing and printing method of alkali-activated cementing material
  • Alkali-activated cementing material for 3D printing and printing method of alkali-activated cementing material

Examples

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Example Embodiment

[0029] Example 1

[0030] Select 25.8% by weight of blast furnace slag powder (alkaline index M b =1), 20.7% coarse aggregate and 30.9% yellow sand fine aggregate are put into a mixer and mixed well, 0.08% carbon nanofiber is added to a mixture of 0.01% defoamer and 0.26% water reducing agent 8.3% water Disperse it in the liquid and ultrasonically for more than 10 minutes in an ultrasonic instrument, then add it to the mixer and stir for 5-10 minutes to make the solid raw material change from the dispersed state to the viscous slurry state, and then add 9.81% steel fiber to the slurry evenly In the process, a mixture slurry is obtained. Then use a transfer pump to transfer the water glass solution (modulus 1.5) and the mixture slurry to the printing and mixing machine arm for mixing. Through a computer-designed program, the printing and mixing robot arm is controlled to print concrete layer by layer until the printing process of the entire building is completed, and finally a 3D...

Example Embodiment

[0032] Example 2

[0033] Select 2.9% by weight Portland cement, 26.6% fly ash, 23.6% coarse aggregate and 29.5% yellow sand fine aggregate into the mixer and mix well, add 0.14% silicon carbide fiber to dissolve 0.01% defoaming And 0.15% water reducing agent 4.9% water and disperse in an ultrasonic instrument for more than 10 minutes, then add it to the mixer and stir for 5-10min to make the solid raw material change from the dispersed state into a viscous slurry State, then 9.88% steel fiber is evenly added to the slurry to obtain a mixture slurry. Then use the transfer pump to transfer the water glass (modulus 1.8) and the mixture slurry to the printing and mixing machine arm for mixing. Through a computer-designed program, the printing and mixing robot arm is controlled to print concrete layer by layer until the printing process of the entire building is completed, and finally a 3D printed alkali-activated cementitious concrete building is obtained.

[0034] As a result, the ...

Example Embodiment

[0035] Example 3

[0036] Select 6.1% by weight Portland cement, 12.1% steel slag, 12.1% blast furnace slag powder (alkaline index M b =1), 24.2% coarse aggregate and 33.4% yellow sand fine aggregate are put into a mixer and mixed and mixed, 0.27% zirconia fiber is added to a mixture of 0.01% defoamer and 0.23% water reducing agent 7.1% water Disperse in the liquid and ultrasonically for more than 10 minutes and stir for 5-10 minutes to make the solid raw material change from the dispersed state to the viscous slurry state, and then add 0.59% basalt fiber uniformly to the slurry to obtain a mixture slurry. Then use a transfer pump to transfer the water glass (modulus 1.7) and the mixture slurry to the printing and mixing machine arm for mixing. Through a computer-designed program, the printing and mixing machine arm is controlled to print concrete layer by layer until the entire building printing process is completed. , And finally get 3D printed alkali-activated cementitious con...

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Abstract

The invention discloses an alkali-activated cementing material for 3D printing and a printing method of the alkali-activated cementing material. The alkali-activated cementing material consists of the following raw materials: industrial wastes, an alkali activating agent, fine aggregates, a defoaming agent, a water reduction agent, water, coarse aggregates, high-strength fiber and a micro nano material. A prepared slurry mixture is fed by two pumps and is printed and molded in a 3D printing mode. The problem that 3D printing concrete is low in early strength is solved, and the slurry properties of the alkali-activated cementing material are effectively improved; as the slurry is fed by two pumps, the problems that the alkali-activated cementing material is high in condensation rate and not applicable to 3D printing are solved; and due to doping of various fibers, final pressure and bending resistance of printed concrete is greatly improved.

Description

technical field [0001] The invention relates to an alkali-activated cementitious material and a preparation method thereof, in particular to an alkali-activated cementitious material concrete suitable for 3D printing technology. Background technique [0002] Alkali-activated cementitious materials mainly use blast furnace slag, granulated phosphorus slag, steel slag, fly ash and other industrial waste residues as raw materials. They have low energy consumption and low emissions, and are called green low-carbon cementitious materials. At the same time, this material also has many excellent properties such as high early strength, good durability, good thermal stability, etc., and is considered to be a new type of cementitious material with broad application prospects. Therefore, with the increasing attention to climate warming in recent years, the preparation and application technology of alkali-activated gelling materials has become a research hotspot and frontier in the fiel...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B28/04B33Y70/00
Inventor 赖建中王强杨浩若郑晓博杨继全乔羽谭诚杨晓玉胡勇
Owner NANJING UNIV OF SCI & TECH
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