Super-flexible sulphoaluminate cement-based 3D printing material

A sulfoaluminate cement and 3D printing technology, applied in the field of building materials, can solve the problems of poor toughness and high strength, and achieve the effects of improving flexibility, ensuring mechanical strength, good flexibility and elasticity

Inactive Publication Date: 2020-11-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a kind of using sulfoaluminate cement as the cementitious material for the above-mentioned deficiencies in the prior art, and through a large amount of polymer (redispersible latex powder or polyurethane emulsion) as the idea, Under the condition of not adding ribs or grids, etc., it solves the shortcomings of traditional inorganic non-metallic materials with high strength but poor toughness, so that it can be used

Method used

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  • Super-flexible sulphoaluminate cement-based 3D printing material

Examples

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Example Embodiment

[0031] Example 1

[0032] A super-flexible sulphoaluminate cement-based 3D printing material. The raw materials include the following materials in parts by weight: 850 parts of cement, 4 parts of water reducing agent, 0.4 parts of thickener warm wheel rubber, 150 parts of redispersible latex powder, 2 parts of defoamer, 1 part of thickener cellulose ether, 1 part of coagulant.

[0033] The specific preparation method is as follows: Weigh the prepared raw material powder according to the proportion, and mix the other raw materials except water fully; according to the set water-cement ratio of 0.34, weigh the amount of water in the proportion, and then combine the mixed powder The materials and water are poured into a mixing container. The mixing procedure is as follows: first stir slowly for 30 seconds, then quickly stir for 3-4 minutes, and mix evenly. The resulting slurry is a super-flexible sulphoaluminate cement-based 3D printing material.

[0034] The initial setting and final s...

Example Embodiment

[0038] Example 2

[0039] A super-flexible sulphoaluminate cement-based 3D printing material. The raw materials include the following materials in parts by weight: 750 parts of cement, 4 parts of water reducing agent, 0.5 parts of thickener warm wheel rubber, 250 parts of redispersible latex powder, 2 parts defoamer, 2 parts cellulose ether thickener, 2 parts coagulant.

[0040] The corresponding slurry was prepared with a water-cement ratio of 0.36 and the same method as in Example 1. The measured maximum deformation was 7.2%, and the initial setting and final setting time were 34 min and 45 min, respectively. The 1d flexural and compressive strengths are 5.8MPa and 13.7MPa, respectively, the 3d flexural and compressive strengths reach 7.5MPa and 15.2MPa, respectively, and the 7d flexural and compressive strengths reach 8.0MPa and 17.9MPa, respectively. The accumulation rate Is 55%. The test results indicate that the super-flexible sulfoaluminate cement-based 3D printing materia...

Example Embodiment

[0041] Example 3

[0042] A super-flexible sulphoaluminate cement-based 3D printing material. The raw materials include the following materials in parts by weight: 750 parts of cement, 4 parts of water reducing agent, 0.5 parts of thickener temperature wheel rubber, water-based polyurethane emulsion (using Xinletian brand Water-based polyurethane waterproof coating) 200 parts, defoamer 2 parts, thickener cellulose ether 3 parts, coagulant 4 parts.

[0043] The water-cement ratio was 0.33, and the corresponding product was prepared by the same method as in Example 1. The measured maximum deformation was 5.5%, and the initial setting and final setting time were 36 min and 45 min, respectively. The 1d flexural and compressive strengths are 5.5MPa and 13.2MPa, respectively, the 3d flexural and compressive strengths reach 7.2MPa and 15.6MPa, respectively, and the 7d flexural and compressive strengths reach 8.3MPa and 17.7MPa, respectively. The accumulation rate Is 60%. The test result...

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Abstract

The invention discloses a super-flexible sulphoaluminate cement-based 3D printing material, which is prepared from the following components in parts by weight: 750 to 850 parts of cement, 3 to 5 partsof a water reducing agent, 0.3 to 0.6 part of thickening agent welan gum, 150 to 250 parts of redispersible latex powder, 2 to 4 parts of a defoaming agent, 1 to 4 parts of thickening agent celluloseether and 1 to 4 parts of a coagulant. The problem that the setting time and flexibility of a traditional 3D printing material cannot be considered at the same time is solved, a large-dosage polymermode is applied to a building material and combined with 3D printing, and a product with good working performance, good mechanical performance and good flexibility is obtained.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a sulphoaluminate cement-based 3D printing material. Background technique [0002] With the development of cement-based materials as the base material for 3D printing, not only large-volume buildings can be manufactured by 3D printing, but also small components can be controlled by machine programming to achieve the purpose of small tolerances. In addition, for some components, the stress state is not the traditional compressive or bending state of the building, more often it is not used as a structural component, but as a functional material to play the role of mosaic or protection , so the molded material needs to have good durability, and a certain degree of elasticity and flexibility when necessary. In recent years, due to the rapid development of inorganic non-metallic materials, cement materials can be used in combination with organic materials in some cases, ...

Claims

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Application Information

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IPC IPC(8): C04B28/06
CPCC04B28/06C04B2111/00181C04B2201/50C04B2103/302C04B2103/44C04B2103/0057C04B2103/50C04B2103/12
Inventor 陈烨赵青林
Owner WUHAN UNIV OF TECH
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