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A layered bionic building component suitable for 3D printing and its preparation method

A building component, 3D printing technology, applied in the field of building materials and 3D printing, can solve the problems of inability to know the tensile deformation ability, difficult to meet the special requirements of 3D printing, etc., to achieve good micro-crack distribution performance, good energy consumption performance, Simple preparation method

Active Publication Date: 2020-08-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its tensile deformation capacity is unknown, and there is no component bending test data, indicating that this type of material is still difficult to meet the special requirements of 3D printing

Method used

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  • A layered bionic building component suitable for 3D printing and its preparation method
  • A layered bionic building component suitable for 3D printing and its preparation method
  • A layered bionic building component suitable for 3D printing and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] There are three products in this example, and their serial numbers are recorded as: no separation-1, no separation-2, and no separation-3.

[0035] The concrete used in this embodiment includes P.O.52.5 ordinary Portland cement, quartz sand, fly ash, water reducing agent, tap water and polyethylene fiber. Each component is shown in Table 1 below, and each part in the table is the content in parts by weight. The polyethylene fiber in Table 1 has a length of 12 mm and an aspect ratio of 400.

[0036] Table 1 product components and parts by weight content

[0037] label cement Quartz sand fly ash Superplasticizer water polyethylene fiber No separation - 1 593 474 712 4 329 19 no separation-2 593 474 712 4 329 19 No separation - 3 593 474 712 4 329 19

[0038] The preparation process of the layered bionic building components suitable for 3D printing in this embodiment is as follows:

[0039] (1) Add cement, quartz...

Embodiment 2

[0048] There are two products in this example, and their serial numbers are recorded as: 2 with 1 point-1, and 2 with 1 point-2.

[0049] The concrete used in this embodiment includes P.O.52.5 ordinary Portland cement, quartz sand, fly ash, water reducing agent, tap water and polyethylene fiber. Each component is shown in Table 3 below, and each part in the table is the content in parts by weight. In Table 3, the polyethylene fiber length is 12 mm, and the aspect ratio is 400.

[0050] Table 3 product components and parts by weight

[0051] label cement Quartz sand fly ash Superplasticizer water polyethylene fiber 2 consecutive 1 point -1 593 474 712 4 329 19 2 consecutive 1 point -2 593 474 712 4 329 19

[0052] In this embodiment, when the bionic building components are poured in layers, a separation of 2 and 1 is used, that is, the separation film is a narrow PVC strip with a width of 10 mm placed every 20 mm along the length...

Embodiment 3

[0062] There are two products in this example, and their numbers are recorded as 1 with 1 point-1 and 1 with 1 point-2 respectively.

[0063] The concrete used in this example includes PO.52.5 ordinary Portland cement, quartz sand, fly ash, water reducing agent, tap water and polyethylene fiber, and each component is shown in Table 5 below, and each part in the table is the weight content , wherein, the polyethylene fiber length in Table 5 is 12mm, and the aspect ratio is 400.

[0064] Table 5 Product components and parts by weight

[0065] label cement Quartz sand fly ash Superplasticizer water polyethylene fiber 1 point in a row - 1 593 474 712 4 329 19 1 point in a row - 2 593 474 712 4 329 19

[0066] In this embodiment, when the bionic building components are poured in layers, a 1-to-1 separation is used, that is, the separation film is a PVC narrow strip with a width of 20 mm placed every 20 mm along the beam length direct...

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Abstract

The invention relates to a layered bionic building element used for 3D printing and a preparation method thereof. The building element is prepared by layered casting of concrete. The concrete comprises the following components in parts by weight: 590-600 parts of cement, 470-480 parts of quartz sand, 710-720 parts of fly ash, 3-5 parts of a water reducer, 320-330 parts of water, and 15-20 parts ofultrahigh molecular weight polyethylene fiber. The prepration method comprises the following steps: adding dry powder in a mixer and uniformly stirring the material, adding water in the mixer and stirring a slurry, adding polyethylene fiber and stirring the material, and performing layered casting moulding. According to the layered casting, a separation layer is arranged between layers, and bonding and slipping adjustment between the layers can be realized. Compared with the prior art, the bending strength of layered beams is high, bending deformation capability is obviously increased, crackdeflection and bifurcation in a layered structure are realized, the building element has good deformation capability and dissipating energy performance, and can be used for a layered construction modecomprising building 3D printing.

Description

technical field [0001] The invention relates to the technical fields of building materials and 3D printing, in particular to a layered bionic building component suitable for 3D printing and a preparation method thereof. Background technique [0002] Traditional reinforced concrete structures are facing problems such as rising labor costs and complex construction requirements, and new solutions are urgently needed for structural forms and construction methods. The new 3D printing architecture is highly respected because of its advantages of rapid prototyping, extremely low labor usage, changeable shapes and strong adaptability to harsh environments, and is one of the most promising future architectural forms. However, due to the special process of 3D printing, the current 3D printed buildings have double defects in materials and structures, so that this promising architectural technology still stays in the outline and model printing, and cannot create a building that can resi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04B28B1/00B28C5/40B33Y10/00B33Y70/10
CPCB28B1/001B28C5/402B33Y10/00B33Y70/00C04B28/04C04B2111/00181C04B2201/50C04B14/06C04B18/08C04B16/0625C04B2103/302
Inventor 余江滔叶俊宏
Owner TONGJI UNIV
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