A kind of desulfurization gypsum 3D printing alkali-activated gelling material and its application method

A technology of cementitious material and desulfurized gypsum, which is applied in the direction of additive processing, etc., can solve the problems of poor structural stability of rheological properties during setting time, difficult application, etc., to improve extrudable performance, reduce deformation rate, and increase compressive strength. Effect

Active Publication Date: 2021-07-27
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fast setting time and difficult-to-control rheological properties of 3D printed alkali-activated gelling materials lead to poor structural stability after printing, and it is difficult to apply in 3D printing technology.

Method used

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  • A kind of desulfurization gypsum 3D printing alkali-activated gelling material and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A desulfurized gypsum 3D printing alkali-activated gelling material. In parts by weight, the alkali-activated gelling material includes: 50 parts of slag, 35 parts of desulfurized gypsum, 0.02 parts of activator, 7 parts of attapulgite, and 0.5 part of thickener , 2 parts of water-absorbent resin, 25 parts of water. The alkali activator is a mixture of water glass, sodium sulfate and sodium phosphate, and the mass ratio of the three is 2:1:1 in sequence.

Embodiment 2

[0042] A desulfurized gypsum 3D printing alkali-activated gelling material. In parts by weight, the alkali-activated gelling material includes: 40 parts of slag, 22 parts of desulfurized gypsum, 0.04 parts of activator, 3 parts of attapulgite, and 0.3 parts of thickener , 5 parts of water-absorbent resin, 20 parts of water. The alkali activator is a mixture of water glass, sodium sulfate and sodium phosphate, and the mass ratio of the three is 2:1.2:1 in sequence.

Embodiment 3

[0044] A desulfurized gypsum 3D printing alkali-activated gelling material. In parts by weight, the alkali-activated gelling material includes: 40 parts of slag, 20 parts of desulfurized gypsum, 0.05 part of activator, 5 parts of attapulgite, and 0.2 part of thickener , 1 part of water-absorbent resin, 30 parts of water. The alkali activator is a mixture of water glass, sodium sulfate and sodium phosphate, and the mass ratio of the three is 2:0.8:1 in sequence.

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Abstract

The invention belongs to the field of 3D printing building materials, in particular to a desulfurized gypsum 3D printing alkali-activated gelling material and a use method thereof. In parts by weight, the alkali-activated gelling material includes solid components and liquid components, and the solid components and liquid components are stored separately, wherein: the solid components include: 40-60 parts of slag, desulfurization 20-50 parts of gypsum, 0.02-0.05 parts of activator, 3-10 parts of attapulgite, 0.1-0.5 parts of thickener, 1-5 parts of water-absorbing resin; the liquid components include: 20-40 parts of water. The present invention uses desulfurized gypsum as the main raw material and coordinates the coagulation and hardening rate and the rheology of the alkali-activated gelling material through additives to meet the extrudability requirements necessary for 3D printing. Not only can desulfurized gypsum be recycled to reduce the amount of slag and save costs, but it can also be used in 3D printing on a large scale to develop efficient green building materials.

Description

technical field [0001] The invention belongs to the field of 3D printing building materials, and in particular relates to an alkali-activated gelling material that uses desulfurized gypsum and slag waste and uses thixotropic agents and viscosity modifiers to regulate the stability of 3D printing structures and improve mechanical properties. Background technique [0002] In the Background of the Invention, the disclosed information is only intended to increase the understanding of the general background of the present invention, and is not necessarily to be regarded as an acknowledgment or in any form to imply that the information constitutes the prior art already known to those skilled in the art. [0003] Compared with traditional construction technology, 3D printing construction technology has the advantages of environmental protection, green and low cost, can greatly improve production efficiency, and it is easy to print curved and complex buildings. However, the currentl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14B33Y10/00B33Y70/10
CPCB33Y10/00B33Y70/00C04B28/144C04B2111/00017C04B2201/50C04B7/1535C04B14/102C04B2103/44C04B22/00C04B22/147C04B22/16C04B24/38
Inventor 芦令超陈明旭李来波赵丕琪王守德宫晨琛
Owner UNIV OF JINAN
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