A kind of lightweight concrete for 3D printing and its preparation method and application

A lightweight concrete, 3D printing technology

Active Publication Date: 2018-02-23
CHONGQING CONSTR ENG NEW BUILDING MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a lightweight concrete for 3D printing and its preparation method and application, which are used to solve the problems of poor cohesiveness, easy deformation, and insufficiency of concrete materials in the prior art. Applicable to issues such as 3D printing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A lightweight concrete for 3D printing, including the following raw materials in parts by weight: 100 parts of 52.5R ordinary Portland cement, 11 parts of 42.5 rapid hardening sulfoaluminate cement, 7 parts of fly ash, composite inert lightweight filler 150 parts of raw materials, 1.2 parts of polypropylene fibers with a length of 20mm, 0.12 parts of viscosity regulator, 0.5 parts of flexibility regulator, and 40 parts of water.

[0024] The raw materials and weight ratio of the composite inert lightweight filler are medium sand: pottery sand with a particle size less than 5mm: vitrified microbeads: polyphenylene particles = 20:70:10:2. The viscosity regulator is maltodextrin, and the flexibility regulator is polyethylene glycol monoallyl ether.

[0025] The preparation method of the above-mentioned lightweight concrete for 3D printing comprises the following steps:

[0026] S1. Put medium sand, pottery sand with a particle size of less than 5mm, vitrified microbeads, ...

Embodiment 2

[0031] A lightweight concrete for 3D printing, including the following raw materials in parts by weight: 100 parts of 52.5R ordinary Portland cement, 9 parts of 42.5 rapid hardening sulfoaluminate cement, 8 parts of fly ash, composite inert lightweight filler 120 parts of material, 1.2 parts of polypropylene fiber with a length of 30mm, 0.1 part of viscosity regulator, 1 part of flexibility regulator, and 30 parts of water.

[0032] The raw materials and weight ratio of the composite inert lightweight filler are medium sand: pottery sand with a particle size less than 5mm: vitrified microbeads: polyphenylene particles = 20:70:10:4. The viscosity regulator is Wenlun glue, and the flexibility regulator is polymethyl methacrylate.

[0033] The preparation method of the above-mentioned lightweight concrete for 3D printing comprises the following steps:

[0034] S1. Put medium sand, pottery sand with a particle size of less than 5mm, vitrified microbeads, and polyphenylene particl...

Embodiment 3

[0039] A lightweight concrete for 3D printing, including the following raw materials in parts by weight: 100 parts of 52.5R ordinary Portland cement, 10 parts of 42.5 rapid-hardening sulfoaluminate cement, 9 parts of fly ash, and composite inert lightweight filler 180 parts of material, 1.2 parts of polypropylene fiber with a length of 30mm, 0.1 part of viscosity regulator, 0.8 part of flexibility regulator, and 35 parts of water.

[0040]The raw materials and weight ratio of the composite inert lightweight filler are medium sand: pottery sand with a particle size less than 5mm: vitrified microbeads: polyphenylene particles = 35:62:15:2.5. The viscosity regulator is hydroxypropyl methyl cellulose ether, and the flexibility regulator is a mixture of polyethylene glycol monoallyl ether and polymethyl methacrylate.

[0041] The preparation method of the above-mentioned lightweight concrete for 3D printing comprises the following steps:

[0042] S1. Put medium sand, pottery sand ...

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Abstract

The invention provides a light-weight concrete for 3D printing, and a preparation method and application thereof. The light-weight concrete is prepared from the following raw materials in parts by weight: 100 parts of 52.5R ordinary Portland cement, 6-12 parts of quick-setting sulfoaluminate cement with the strength level of not less than 42.5, 7-10 parts of fly ash, 100-250 parts of composite inert light-weight filler, 1.2-6.5 parts of polypropylene fiber, 0.06-0.2 part of viscosity modifier, 0.5-1.5 parts of flexibility modifier and 25-40 parts of water. Compared with the traditional concrete material, the dead weight of the material is obviously lowered by 25-40%, the pressure deformation from the upper layer material to the lower layer material in the printing process is greatly reduced, and the number of layers of one-step continuous printing can be further increased, thereby shortening the construction period. Besides, the material has certain heat-shielding and heat-insulating properties, so that the light-weight concrete is more energy-saving and environment-friendly when being applied to the field of buildings.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a lightweight concrete for 3D printing and its preparation method and application. Background technique [0002] 3D printing is an advanced digital manufacturing method, also known as "additive manufacturing". Different from traditional manufacturing methods, this technology only needs to process the 3D model in the computer through a series of algorithms and software, and then it can be directly printed one by one. The entity is manufactured by accumulating materials layer by layer, without the need for original embryos and molds, which simplifies the manufacturing process of the product, saves manpower, and improves production efficiency. [0003] The 3D printing building is mainly 3D modeling through the computer, using the set software program, through mechanical control, the prepared concrete mixture is extruded from the nozzle and printed layer by layer, and superimposed l...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C04B28/06B33Y70/00C04B111/40
CPCB33Y70/00C04B28/06C04B2111/40C04B2201/20C04B2201/32C04B7/02C04B18/08C04B16/0633C04B14/02C04B14/24C04B14/06C04B16/08C04B24/383C04B24/32C04B2103/0085C04B24/2641
Inventor石从黎林宗浩樊先平陈敬杨再富
OwnerCHONGQING CONSTR ENG NEW BUILDING MATERIALS