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Printing and reinforcement method for 3D printing concrete member

A 3D printing and concrete technology, which is applied in the direction of building components, structural elements, building reinforcements, etc., can solve problems such as inability to play a strengthening role, and achieve the effect of ensuring integrity and relative position, sufficient reinforcement, and preventing damage

Pending Publication Date: 2022-03-04
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since 3D printed concrete cannot be equipped with reinforcement cages, in order to improve the mechanical performance of 3D printed concrete structures, there are methods such as adding fibers, presetting steel cables, improving printer technology, and laying reinforcements in layers. Comprehensive reinforcement like a steel cage

Method used

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  • Printing and reinforcement method for 3D printing concrete member
  • Printing and reinforcement method for 3D printing concrete member
  • Printing and reinforcement method for 3D printing concrete member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Prepare concrete according to the mix ratio in Table 1:

[0056] Table 1 Mix #1

[0057]

[0058] Note: The amount of cellulose ether, sodium gluconate, and polycarboxylate superplasticizer is calculated based on the amount of cement.

[0059] Concrete is prepared and mixed according to the above mixing ratio. When mixing the concrete, there should be no segregation or bleeding. After mixing fully, the measured slump is 120mm; when printing, it is observed that the concrete is continuous and uniform, without clogging, and without obvious cracks. Cracked, the shape remains stable and does not collapse;

[0060] The component is a beam component, the size is 240×600×2000, the size of the extruded single-layer concrete is 30mm×100mm, and 8 layers are printed;

[0061] Reinforcement according to figure 1 The grid configuration shown, the relevant parameters α = 45°, θ = 45°, four HRB400 with a diameter of 16mm are equipped in the tension area, and the compression area...

Embodiment 2

[0067] Prepare concrete according to mix ratio #2 in Table 3:

[0068] Table 3 Mix #2

[0069]

[0070] Note: The amount of cellulose ether, sodium gluconate, and polycarboxylate superplasticizer is calculated based on the amount of cement.

[0071] Concrete is prepared and mixed according to the above mixing ratio. When mixing the concrete, there should be no segregation or bleeding. After mixing fully, the measured slump is 120mm; when printing, it is observed that the concrete is continuous and uniform, without clogging, and without obvious cracks. Cracked, the shape remains stable and does not collapse;

[0072] The component is a beam component, the size is 240×600×2000, the size of the extruded single-layer concrete is 30mm×100mm, and 8 layers are printed;

[0073] Reinforcement according to figure 1 The grid configuration shown, the relevant parameters α = 45°, θ = 45°, four HRB400 with a diameter of 16mm are equipped in the tension area, and the compression area ...

Embodiment 3

[0079] Embodiment 3 comparative example

[0080] Prepare concrete according to mix ratio #3 in Table 5:

[0081] Table 5 Mix #2

[0082]

[0083] Note: The amount of cellulose ether, sodium gluconate, and polycarboxylate superplasticizer is calculated based on the amount of cement.

[0084] Concrete was prepared and stirred according to the above mixing ratio. When the concrete was mixed, segregation and bleeding occurred. After mixing fully, the slump was measured to be 180mm; when printing, it was observed that the concrete was continuous and not clogged, but uneven. Print the upper layer During concrete, the form of the lower concrete is easily deformed and collapsed, making it impossible to print. Therefore, the printing performance requirements pointed out in the present invention are required to prepare concrete.

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Abstract

The invention relates to a printing and reinforcement method of a 3D printing concrete member, which comprises the following steps: (1) determining a mix proportion: preparing concrete suitable for a 3D printing structure, fully mixing, testing related printing performance, and meeting various performance requirements, otherwise, adjusting or repreparing until the requirements are met; (2) according to design requirements, relevant parameters of components, relevant parameters of equipment and relevant parameters of reinforcing bars are determined; and (3) after single-layer concrete is printed, rib grids are laid, concrete layer printing and rib grid laying are repeated till a complete spliced rib cage is formed, and finally concrete is covered to form a complete component. According to the method, the influence of 3D printing anisotropy on the 3D printing concrete structure is relieved through the staggered joint printing method, meanwhile, the reinforcing bars integrating the tensile longitudinal bars, the erection bars and the stirrups are configured, the assembled bar cage is formed, and the stress performance of the 3D printing concrete structure is improved.

Description

technical field [0001] The invention belongs to the technical field of reinforcement of 3D printed beam components, and in particular relates to a method for printing and reinforcement of 3D printed concrete components. Background technique [0002] 3D printing concrete technology is a new construction technology that closely combines concrete structure construction with digital models. The three-dimensional structure formed by stacking out concrete. Applying the concept of 3D printing to concrete structures has many advantages that traditional construction techniques do not have: flexible structural forms, fast construction speed, high degree of refinement, less labor requirements, and more friendly to the environment. [0003] However, 3D printed concrete structures also have problems that do not exist in traditional concrete structure construction techniques. The traditional cast-in-place method can use a complete steel cage to cooperate with pouring concrete and work t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B33Y10/00B33Y50/00B33Y50/02B33Y70/00B33Y70/10B33Y80/00B33Y99/00E04C5/03E04G21/02E04G21/12E04G21/00
CPCB33Y10/00B33Y50/00B33Y50/02B33Y70/00B33Y70/10B33Y80/00B33Y99/00E04C5/03E04G21/02E04G21/123E04G21/00
Inventor 周鑫王伟光林镜星谢志炜桑成磊梁汝锡廖磊郑皓云
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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