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A coagulation and early strength agent for 3D printing cement-based materials

A technology of cement-based materials and accelerated coagulation and early strength, applied in the field of coagulation accelerators, can solve the problems of long setting time and high price of fast-hardening sulfoaluminate cement, and achieve short hardening time, excellent performance over time, shortened The effect of clotting time

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

Method used

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  • A coagulation and early strength agent for 3D printing cement-based materials
  • A coagulation and early strength agent for 3D printing cement-based materials
  • A coagulation and early strength agent for 3D printing cement-based materials

Examples

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Comparison scheme
Effect test

Embodiment 1

[0027] A coagulation early-strength agent for 3D printing cement-based materials, including random copolymers polymerized from the following monomers: 60 parts by weight of unsaturated polyether, 25 parts by weight of unsaturated carboxylic acid, 20 parts by weight of Polar unsaturated monomer; also includes: 10 parts of chitosan-coated calcium fluoroaluminate.

[0028] Its preparation method comprises the following steps:

[0029] (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;

[0030] (2) Preparation of random copolymer: add unsaturated polyether, unsaturated carboxylic acid and polar unsaturated monomer into the reactio...

Embodiment 2

[0040] A coagulation early-strength agent for 3D printing cement-based materials, including a random copolymer polymerized from the following monomers: 70 parts by weight of unsaturated polyether, 15 parts by weight of unsaturated carboxylic acid, 3 parts by weight of Polar unsaturated monomer; also includes: 20 parts of chitosan-coated calcium fluoroaluminate.

[0041] Its preparation method comprises the following steps:

[0042] (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;

[0043] (2) Preparation of random copolymer: add unsaturated polyether, unsaturated carboxylic acid and polar unsaturated monomer into the reactio...

Embodiment 3

[0053] A coagulation early strength agent for 3D printing cement-based materials, including a random copolymer polymerized from the following monomers: 65 parts by weight of unsaturated polyether, 20 parts by weight of unsaturated carboxylate, 10 parts by weight The polar unsaturated monomer; also includes: 15 parts of chitosan-coated calcium fluoroaluminate.

[0054] Its preparation method comprises the following steps:

[0055] (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;

[0056] (2) Preparation of random copolymer: add unsaturated polyether, unsaturated carboxylate and polar unsaturated monomer into the reaction ...

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Abstract

The invention provides a coagulation early strength agent for 3D printing cement-based materials, comprising a random copolymer polymerized from the following monomers: 60-70 parts by weight of unsaturated polyether, 15-25 parts by weight The unsaturated carboxylic acid or unsaturated carboxylate, 3-20 parts by weight of polar unsaturated monomers; further comprising: 10-20 parts of chitosan-coated calcium fluoroaluminate. The setting accelerator and early strength agent for 3D printing cement-based materials provided by the invention can greatly shorten the setting time of concrete, increase the early strength, and meanwhile, the setting and hardening time of cement is short and controllable.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a setting accelerator and early strength agent for 3D printing cement-based materials. Background technique [0002] Concrete is an inorganic composite material composed of cementitious materials as the matrix material and the aggregate particles in it are bonded together. It is the most widely used building material at present. The traditional construction process of concrete building is many, the required construction period is long, and the manpower and material resources are large. The application of 3D printing technology for building construction has more advantages: firstly, no mold is required in the molding process, thereby reducing the cost of mold costs, and the molding of special-shaped components can be completed; secondly, the entire process can be completely machined. , reducing the number of workers, thereby reducing labor costs; thirdly, the constru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/26C08F283/06C08F220/06C08F228/02C08F222/06C08F222/02C04B103/10C04B22/12
CPCC04B24/2694C04B20/1048C04B40/0039C08F283/065C04B2103/10C04B22/126C08F220/06C08F228/02C08F222/06C08F222/02
Inventor 周栋梁赵君
Owner 南京博科新材料产业研究院有限公司
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