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A cement-based material for architectural 3D printing

A cement-based material and 3D printing technology, applied in the field of cement-based materials, can solve the problems of high price of fast-hardening sulfoaluminate cement, long setting and hardening time, and influence on the performance of the mixture, and achieve excellent buildability and shorten the setting time. Time and lateral deformation controllable effects

Active Publication Date: 2022-07-29
南京博科新材料产业研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that ordinary portland cement has a longer setting time, while the price of fast hardening sulfoaluminate cement is higher
[0006] At present, the traditional 3D printing cement-based materials have a single type, and the setting and hardening time of cement-based materials is generally longer. Although some admixtures and admixtures can be added to adjust, other properties of the mixture will also be affected.

Method used

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  • A cement-based material for architectural 3D printing
  • A cement-based material for architectural 3D printing
  • A cement-based material for architectural 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1 Preparation of coagulation accelerator and early strength agent

[0050] A coagulation early strength agent, including random copolymers polymerized from the following monomers: 60 parts by weight of unsaturated polyether, 25 parts by weight of unsaturated carboxylic acid, and 20 parts by weight of polar unsaturated monomers; also Includes: 10 parts chitosan-coated calcium fluoroaluminate.

[0051] Its preparation method comprises the following steps:

[0052] (1) Preparation of chitosan-coated calcium fluoroaluminate: under constant temperature conditions, in an aqueous solution of chitosan and acetic acid, calcium fluoroaluminate and epichlorohydrin are sequentially heated and stirred to react to obtain chitosan-coated calcium fluoroaluminate. Calcium fluoroaluminate; wherein, the mass ratio of calcium fluoroaluminate, chitosan and epichlorohydrin is 1:1:2;

[0053] (2) Preparation of random copolymer: add unsaturated polyether, unsaturated carboxylic acid...

Embodiment 2

[0062] Example 2 Preparation of coagulation accelerator and early strength agent

[0063] A coagulation early strength agent, including a random copolymer polymerized from the following monomers: 70 parts by weight of unsaturated polyether, 15 parts by weight of unsaturated carboxylic acid, and 3 parts by weight of polar unsaturated monomers; Includes: 20 parts of chitosan-coated calcium fluoroaluminate.

[0064] Its preparation method comprises the following steps:

[0065] (1) Preparation of chitosan-coated calcium fluoroaluminate: under constant temperature conditions, in an aqueous solution of chitosan and acetic acid, calcium fluoroaluminate and epichlorohydrin are sequentially heated and stirred to react to obtain chitosan-coated calcium fluoroaluminate. Calcium fluoroaluminate; wherein, the mass ratio of calcium fluoroaluminate, chitosan and epichlorohydrin is 2:1:1;

[0066] (2) Preparation of random copolymer: add unsaturated polyether, unsaturated carboxylic acid a...

Embodiment 3

[0075] Example 3 Preparation of coagulation accelerator and early strength agent

[0076] A coagulation early strength agent, including a random copolymer polymerized from the following monomers: 65 parts by weight of unsaturated polyether, 20 parts by weight of unsaturated carboxylate, and 10 parts by weight of polar unsaturated monomers; Also included: 15 parts chitosan-coated calcium fluoroaluminate.

[0077] Its preparation method comprises the following steps:

[0078] (1) Preparation of chitosan-coated calcium fluoroaluminate: under constant temperature conditions, in an aqueous solution of chitosan and acetic acid, calcium fluoroaluminate and epichlorohydrin are sequentially heated and stirred to react to obtain chitosan-coated calcium fluoroaluminate. Calcium fluoroaluminate; wherein, the mass ratio of calcium fluoroaluminate, chitosan and epichlorohydrin is 1.5:1:1.5;

[0079] (2) Preparation of random copolymer: add unsaturated polyether, unsaturated carboxylate an...

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Abstract

The invention provides a cement-based material for building 3D printing, which is prepared from the following components by weight: 20-40 parts of compound cement; 5-10 parts of mineral admixture; 20-50 parts of fine aggregate ; 4-6 parts of coagulation accelerator; 2-4 parts of modified carbon fiber; 2-4 parts of hydroxypropyl methylcellulose ether; 1-2 parts of rheological enhancer; 1-2 parts of defoamer; Dose 1‑2 parts. The cement-based material used for building 3D printing provided by the present invention has good construction performance, is easy to operate, can be operated for a long time, has high early strength, and develops continuously in later strength, which can meet the design requirements of building structures.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a cement-based material used for building 3D printing. Background technique [0002] Concrete is an inorganic composite material composed of cementitious materials as the matrix material and aggregate particles bonded together. It is currently the most widely used building material. The traditional construction process of concrete buildings has many processes, the required construction period is long, and it consumes a lot of manpower and material resources. The application of 3D printing technology in the construction of buildings has more advantages: firstly, no mold is needed during the molding process, thereby reducing the cost of mold costs, and can complete the molding of special shape components; secondly, the whole process can be completely machine construction , reduce the number of workers, thereby reducing labor costs; thirdly, the construction speed is fast, because...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B14/38C04B24/38B33Y70/10C04B103/12
CPCC04B28/06C04B14/386C04B40/0046B33Y70/10C04B2103/12C04B2111/00181C04B2201/10C04B2201/50C04B7/02C04B18/141C04B18/08C04B18/142C04B14/00C04B2103/14C04B24/383C04B2103/50C04B2103/302C04B14/106C04B14/104C04B18/146C04B24/38C04B22/126C04B24/165
Inventor 倪紫威周栋梁秦玉娇
Owner 南京博科新材料产业研究院有限公司
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