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A powder-bonded 3D printing-like soft rock alkali excitation material and its application method

A 3D printing and powder bonding technology, which is used in the analysis of materials, additive processing, instruments, etc., can solve the problems of incapable of binder jet printing, difficult to distribute uniformly, and high viscosity of the activator, and achieves reduced printing accuracy, laying Dense, low viscosity effect

Active Publication Date: 2021-04-27
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, alkali-activated materials have not been widely used in the above-mentioned powder bonding 3D printing technology. The main problem is that the viscosity of the activator used in it is too high to be directly used as a binder for jet printing through the nozzle. The resulting binder is difficult to distribute evenly in the existing alkali-activated powder, so the existing alkali-activated material is not suitable for powder bonding 3D printing

Method used

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  • A powder-bonded 3D printing-like soft rock alkali excitation material and its application method
  • A powder-bonded 3D printing-like soft rock alkali excitation material and its application method
  • A powder-bonded 3D printing-like soft rock alkali excitation material and its application method

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Experimental program
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Effect test

Embodiment 1

[0045] The powder bonded 3D printing soft rock alkali excitation material used in the simulation of the mechanical properties of soft rock in this embodiment is composed of:

[0046] 1.0 part of fly ash, 1.0 part of blast furnace slag powder, 0.05 part of silica fume, 0.5 part of quartz powder, 0.15 part of limestone powder, 0.01 part of clay, 0.15 part of alkali activator powder, 0.03 part of PVA powder, 0.003 part of glycerin, 0.003 part of cooling liquid, 0.3 parts of water.

[0047] The loss on ignition of the fly ash is 8.2%, the moisture content is 0.08%, the fineness is 26.5% after sieving through a 45 μm square hole sieve, and the maximum particle size is 0.1 mm.

[0048] The alkali activator is anhydrous sodium metasilicate powder.

[0049] The PVA powder is 300-400 mesh, and the density is 1.19-1.31g / cm 3 .

[0050] The average particle size of the quartz powder is 350 μm, the maximum particle size is 0.6 mm, and the specific surface area is 0.155 m 2 / g.

[005...

Embodiment 2

[0064] The powder bonded 3D printing soft rock alkali excitation material used for the simulation of soft rock mechanical properties of the present invention is composed of:

[0065] 0.8 part of fly ash, 1.0 part of blast furnace slag powder, 0.07 part of silica fume, 0.6 part of quartz powder, 0.10 part of limestone powder, 0.005 part of clay, 0.12 part of alkali activator powder, 0.02 part of PVA powder, 0.002 part of glycerin, 0.004 part of cooling liquid, 0.35 parts of water.

[0066] The loss on ignition of the fly ash is 8.2%, the moisture content is 0.08%, the fineness is 26.5% after sieving through a 45 μm square hole sieve, and the maximum particle size is 0.1 mm.

[0067] The density of the blast furnace slag powder is 2.8g / cm 3 , the specific surface area is 350m 2 / kg, the moisture content is 0.3%, and the maximum particle size is 85μm.

[0068] The alkali activator powder is 0.07 part of sodium silicate powder and 0.05 part of sodium hydroxide powder, and the m...

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Abstract

The invention relates to a powder bonded 3D printing soft rock alkali excitation material and its application method. The alkali excitation material is calculated in parts by weight, and its composition and content are respectively: 0.6-1.3 parts of fly ash, 0.6-1.3 parts of blast furnace Slag powder, 0.05-0.15 parts of silica fume, 0.4-0.6 parts of quartz powder, 0.1-0.2 parts of limestone powder, 0.005-0.02 parts of clay, 0.05-0.2 parts of alkali activator powder, 0.01-0.05 parts of PVA powder, 0.002-0.005 parts Glycerin, 0.002-0.005 parts of cooling liquid, 0.2-0.4 parts of water. The alkali-activated material can realize the printing of the simulation model of soft rock mechanical properties, and can be taken out smoothly within 2 hours after printing in step (4), and the compressive strength can reach more than 10 MPa in 28 days at the same time.

Description

technical field [0001] The invention relates to the fields of geotechnical engineering and inorganic materials, in particular to a powder-bonded 3D printing soft rock alkali excitation material and an application method thereof, which is used for simulating the mechanical properties of soft rock. Background technique [0002] Soft rock mass structure is a common structure in major infrastructure and energy engineering. Studying the catastrophe mechanism and failure characteristics of soft rock mass structure is the basis for ensuring the safety of major infrastructure and energy engineering. Physical model testing is the main research method in the field of geotechnical engineering. However, due to the existence of discontinuities and surfaces such as cracks in soft rock mass, there is currently no mature method in the world to make a 3D physical model of soft rock mass. [0003] 3D printing technology is a kind of manufacturing technology that has emerged in recent years, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00B28B1/00B33Y10/00B33Y70/10G01N3/62
CPCB28B1/001B33Y10/00B33Y70/10C04B28/006C04B2111/00181C04B2111/00991C04B2201/50G01N3/62G01N2203/0298C04B18/08C04B18/141C04B18/146C04B14/06C04B14/28C04B14/10C04B24/02C04B24/2623C04B22/002C04B12/04C04B22/062
Inventor 马国伟李之建王里
Owner HEBEI UNIV OF TECH
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