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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 for some non-foundation bearing components or objects in life In addition, the choice of using sulfoaluminate cement and adding a certain amount of coagulant is to ensure its setting and hardening time. It is applied to the field of 3D printing in order to meet the requirements of mass production. The final 3D printing material can be completed within 1 hour Condensation and solidification, the amount of deformation is more than 5%, and its 3-day compressive strength can reach more than 15MPa

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0032] An ultra-flexible sulfoaluminate 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 part of thickener Wenlun glue, 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 above-mentioned raw material powder prepared according to the proportion, and fully mix other raw materials except water; according to the set water-cement ratio 0.34, weigh the water consumption in the mix ratio, and then mix the powder Pour the material and water into the mixing container. The mixing procedure is as follows: first stir slowly for 30 seconds, then stir quickly for 3-4 minutes, and mix evenly. The resulting slurry is the ultra-flexible sulfoaluminate cement-based 3D printing material.

[0034] The initial setting and final setting times of the abov...

Embodiment 2

[0039] An ultra-flexible sulfoaluminate 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 part of thickener Wenlun glue, 250 parts of redispersible latex powder, 2 parts of defoamer, 2 parts of thickener cellulose ether, 2 parts of coagulant.

[0040] The water-cement ratio was 0.36, and the corresponding slurry was prepared by the same method as in Example 1. The measured maximum deformation was 7.2%, and the initial setting and final setting times were 34 minutes and 45 minutes, respectively. Its 1d flexural and compressive strengths were 5.8MPa and 13.7MPa respectively, 3d flexural and compressive strengths reached 7.5MPa and 15.2MPa respectively, and 7d flexural and compressive strengths reached 8.0MPa and 17.9MPa respectively. 55%. The test results show that the ultra-flexible sulfoaluminate cement-based 3D printing material (slurry) prepared in Example 2 has ...

Embodiment 3

[0042] An ultra-flexible sulfoaluminate 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 part of thickener Wenlun glue, 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 in the same manner as in Example 1. The maximum deformation measured was 5.5%, and the initial setting and final setting times were 36 minutes and 45 minutes respectively. Its 1d flexural and compressive strengths are 5.5MPa and 13.2MPa respectively, 3d flexural and compressive strengths reach 7.2MPa and 15.6MPa respectively, and 7d flexural and compressive strengths reach 8.3MPa and 17.7MPa respectively. 60%. The test results show that the ultra-flexible sulfoaluminate cement-base...

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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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