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In-situ construction method and application of pipeline in cement-based material

A technology of cement-based materials and construction methods, applied in the field of 3D printing materials, can solve problems such as damage to the overall performance, voids or defects of cement-based materials

Pending Publication Date: 2022-07-01
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the development of 3D printing technology for cement-based materials is still in its infancy, and there are many problems to be solved urgently
During the layer-by-layer deposition process of 3D printing, gaps or defects are likely to occur between layers, which will damage the overall performance of the cement-based material, and it is difficult to obtain a pipe with good formability inside the cement-based material.

Method used

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  • In-situ construction method and application of pipeline in cement-based material
  • In-situ construction method and application of pipeline in cement-based material
  • In-situ construction method and application of pipeline in cement-based material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Dissolving sodium alginate in water to obtain a sodium alginate solution; the mass content of sodium alginate in the sodium alginate solution is 2.5%;

[0048] Taking the sodium alginate solution as a water phase, taking methyl palmitate as an oil phase, and taking Tween 80 as a two-phase interface stabilizer, obtaining an oil-water two-phase ink with a volume ratio of the oil phase and the water phase of 1:2; The mass fraction of the Tween 80 in the oil phase is 1.0%.

[0049] Mix water and P.O 42.5 cement in a mass ratio of 0.4:1 to obtain cement slurry;

[0050] Using the oil-water two-phase ink as the ink for 3D printing, bury the print head of the 3D printer in the cement slurry, and write the oil-water two-phase ink in the 3D printer into the cement slurry under the control of the printing program , The oil-water two-phase ink prints the program-set structure in the cement slurry. After the cement slurry is solidified, the water in the oil-water two-phase ink is ...

Embodiment 2

[0054] The aqueous solution of hectorite (Lap) with a mass fraction of 5% is used as the water phase, methyl palmitate is used as the oil phase, and hectorite and diddecyldimethylammonium bromide are used as the composite interface stabilizer (the described The mass ratio of hectorite and diddecyl dimethyl ammonium bromide is 5:0.1), utilize Pickering emulsion method, prepare the oil-water two-phase ink of thixotropy; The volume ratio of described oil phase and water phase is 1 :2.

[0055] Mix water and P.O 42.5 cement in a mass ratio of 0.4:1 to obtain cement slurry;

[0056] Using the oil-water two-phase ink as the ink for 3D printing, bury the print head of the 3D printer in the cement slurry, and write the oil-water two-phase ink in the 3D printer into the cement slurry under the control of the printing program , The oil-water two-phase ink prints the program-set structure in the cement slurry. After the cement slurry is solidified, the water in the oil-water two-phase i...

Embodiment 3

[0060] Silica (Lap) nanoparticles with a particle size of 10 nm were used as interface stabilizers and dispersed in water to form an aqueous dispersion with a mass fraction of 5%; air was used as the gas phase and stirred at 400 rpm to prepare a high gas volume ratio. At 95% air-water emulsion (foam).

[0061] Mix water and P.O 42.5 cement in a mass ratio of 0.4:1 to obtain cement slurry;

[0062] Using the air-water emulsion as the ink for 3D printing, bury the print head of the 3D printer in the cement slurry, and write the air-water emulsion ink in the 3D printer into the cement slurry under the control of the printing program, The air-water emulsion ink prints the program-set structure in the cement slurry. After the cement slurry is solidified, the air-water emulsion disproportionates (bubble burst) with the diffusion of gas and the influence of high pH inside the cement-based material to release the pipeline space. , so as to obtain a hollow pipe without a pipe wall in ...

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Abstract

The invention provides an in-situ construction method and application of a pipeline in a cement-based material, and relates to the technical field of 3D printing materials. The in-situ construction method of the pipeline in the cement-based material comprises the following steps that a printing head of a 3D printer is embedded into cement-based material slurry, ink in the 3D printer is written into the cement-based material slurry under the control of a printing program, and the cement-based material slurry is subjected to in-situ construction; and the cement-based material slurry flows after printing and fills the track left by the movement of the printing head, the ink prints a structure set by a program in the cement-based material slurry, and after the cement-based material slurry is cured, the ink remains in the cement-based material to form a pipeline or sacrifices the left pipeline according to the own function. By adopting the method disclosed by the invention, the pipeline can be constructed in situ in the cement-based material, the formability of the pipeline is good, and the adverse effect on the cement-based material is avoided.

Description

technical field [0001] The invention relates to the technical field of 3D printing materials, in particular to an in-situ construction method and application of pipes in cement-based materials. Background technique [0002] In recent years, the 3D printing technology of cement-based materials has developed significantly, and it has been gradually used in construction fields such as housing construction, roads and bridges, and underground engineering. However, the development of 3D printing technology for cement-based materials is still in its infancy, and there are many problems that need to be solved urgently. During the layer-by-layer deposition process of 3D printing, voids or defects are easily generated between layers, which damages the overall performance of cement-based materials, and it is difficult to obtain pipes with good formability inside cement-based materials. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide an in-situ co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/106B28B23/00B33Y10/00B33Y70/10
CPCB29C64/106B28B23/00B33Y10/00B33Y70/10
Inventor 张媛媛董必钦朱光明汤皎宁邢锋潘攀李文强
Owner SHENZHEN UNIV