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Carbon nanotube/fiber concrete for 3D printing and preparation method thereof

A fiber reinforced concrete and carbon nanotube technology, which is applied in the field of building materials, can solve the problems of limited structural type, increased steel skeleton, insufficient toughness, etc., and achieves the effect of convenient material selection, satisfying applicability, and improving bending toughness.

Active Publication Date: 2018-12-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the nature of layer-by-layer accumulation of 3D printing and the automatic setting of printing construction, there are technical obstacles to adding steel skeletons to the entire rapid construction design. Only ordinary printing materials are used, and the toughness is insufficient, and the structural types that can be realized are very limited.

Method used

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  • Carbon nanotube/fiber concrete for 3D printing and preparation method thereof
  • Carbon nanotube/fiber concrete for 3D printing and preparation method thereof
  • Carbon nanotube/fiber concrete for 3D printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] In parts by weight, weigh 8.1 parts of 42.5 sulfoaluminate cement, 6.5 parts of mineral powder, 1.6 parts of silica fume, 4.9 parts of quartz sand, 2.6 parts of water, 0.34 parts of polycarboxylate superplasticizer, and 0.0081 parts of tartaric acid retarder part, 0.16 part of polyvinyl alcohol fiber, 0.0008 part of carbon nanotube, and 0.0032 part of PVP dispersant.

[0083] The specific construction method is to weigh cement, mineral powder, silica fume, quartz sand, and retarder in proportion and then mix them to obtain solid powder for use; weigh water reducing agent, water, and fiber in proportion for use; Carbon nanotubes and dispersant were weighed in proportion and added to water, and ultrasonically treated for 30 minutes to obtain a carbon nanotube mixed solution; water reducer and 1 / 2 of water were added to the mixed solid powder (the amount of water used here After subtracting the amount of water in the mixed solution) and the carbon nanotube mixed solution, ...

Embodiment 2

[0087] In parts by weight, weigh 8.1 parts of 52.5 sulfoaluminate cement, 6.5 parts of mineral powder, 1.6 parts of silica fume, 4.9 parts of quartz sand, 2.6 parts of water, 0.45 parts of polycarboxylate superplasticizer, sodium gluconate retarding 0.016 part of agent, 0.1 part of polyvinyl alcohol fiber, 0.0016 part of carbon nanotube, 0.0065 part of PVP dispersant.

[0088] Concrete construction method is with embodiment 1.

[0089] The performance test results of the prepared carbon nanotube / fiber concrete material are: the fluidity is 163mm; the initial setting time is 80min, the final setting time is 160min; the 1d compressive strength is 17.63MPa, the 3d compressive strength is 46.61MPa, and the 7d compressive strength is 82.71MPa , 28d compressive strength 101.35MPa; 1d flexural strength 7.84MPa, 3d flexural strength 11.55MPa, 7d flexural strength 15.85MPa, 28d flexural strength 17.65MPa.

Embodiment 3

[0091] In parts by weight, weigh 8.4 parts of 42.5 sulfoaluminate cement, 6.7 parts of mineral powder, 1.7 parts of silica fume, 5.0 parts of quartz sand, 2.35 parts of water, 0.39 parts of polycarboxylate superplasticizer, 0.001 part of starch ether, 0.016 part of tartaric acid retarder, 0.1 part of polyvinyl alcohol fiber, 0.004 part of carbon nanotube, 0.016 part of PVP dispersant.

[0092] Refer to Example 1 for the specific construction method.

[0093] The performance test results of the prepared carbon nanotube / fiber concrete material are: fluidity is 159mm; initial setting time is 54min, final setting time is 79min; 1d compressive strength is 47.68MPa, 3d compressive strength is 69.35MPa, and 7d compressive strength is 77.58MPa , 28d compressive strength 89.26MPa; 1d flexural strength 9.75MPa, 3d flexural strength 11.54MPa, 7d flexural strength 13.88MPa, 28d flexural strength 14.59MPa.

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Abstract

The invention discloses a carbon nanotube / fiber concrete for 3D printing and a preparation method thereof. The carbon nanotube / fiber concrete is composed of following raw materials in parts by weight:6.8 to 8.6 parts of cement, 3.0 to 6.7 parts of mineral powder, 1.3 to 2.7 parts of silica fume, 4.7 to 13.8 parts of quartz sand, 2.0 to 4.1 parts of water, 0.2 to 0.5 part of water reducer, 0 to 0.03 part of retarder, 0 to 0.004 part of thixotropic agent, 0.05 to 0.25 part of fibers, 0.0008 to 0.008 part of carbon nanotube, and 0.003 to 0.16 part of dispersant. The provided carbon nanotube / fiber concrete has the advantages of proper initial setting time, proper final setting time, high compression strength, high bending strength, good toughness, good workability, and excellent thixotropic property; layers can be effectively bonded, during the stacking process, deformation and collapse are avoided; the setting and thixotropic properties of the concrete can be precisely designed accordingto the needs of engineering; and different needs such as printing speed, structures, and the like, can be satisfied.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a carbon nanotube / fiber concrete for 3D printing and a preparation method thereof. Background technique [0002] As a rapid prototyping and additive manufacturing technology, 3D printing has been rapidly and widely promoted in various industries since its invention. 3D printing buildings can effectively reduce construction waste, improve construction efficiency, shorten construction period, reduce labor, improve mechanization level, achieve energy saving and emission reduction as a whole, and help improve the environment; in addition, because 3D printing can be controlled by a computer to achieve arbitrary shape design in space, It can combine structural force with architectural aesthetics, reflecting the artistry of architecture. In January 2013, the Netherlands used 3D printed concrete to build a Mobius ring house. In January of the same year, the European Space Agency was de...

Claims

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Application Information

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IPC IPC(8): C04B28/06B33Y70/00C04B14/02C04B16/06
CPCB33Y70/00C04B28/065C04B2111/00181C04B2201/50C04B2201/52C04B18/141C04B18/146C04B14/06C04B2103/302C04B24/06C04B16/0641C04B14/026C04B24/2652C04B24/38
Inventor 孙晓燕汪群王海龙陈杰高超张治成
Owner ZHEJIANG UNIV
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