Desulfurized gypsum 3D (three dimensional) printing alkali-activated cementing material and use method thereof

Abstract

The invention belongs to the field of 3D (three dimensional) printing building materials and particularly relates to a desulfurized gypsum 3D printing alkali-activated cementing material and a use method thereof. The alkali-activated cementing material is prepared from a solid component and a liquid component which are separately stored, wherein, in parts by weight, the solid component comprises 40 to 60 parts of slag, 20 to 50 parts of desulfurized gypsum, 0.02 to 0.05 part of an activator, 3 to 10 parts of attapulgite clay, 0.1 to 0.5 part of a thickening agent and 1 to 5 parts of water absorbent resin; the liquid component comprises 20 to 40 parts of water. According to the invention, the desulfurized gypsum is taken as a main raw material; the extrusion requirements necessary for 3D printing are met by adding an admixture to synergistically regulate the setting and hardening rate and rheological property of the alkali-activated cementing material. The desulfurized gypsum can be recycled, and the use amount of the slag is reduced, so that the cost is reduced; in addition, the alkali-activated cementing material can be applied to 3D printing on a large scale to develop high-efficiency and 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...

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.

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