Gypsum-based composite binding material for extruded 3D printing and preparation method thereof

Abstract

The invention discloses a gypsum-based composite binding material for extruded 3D printing and a preparation method thereof and relates to the field of civil engineering/3D printing materials. Aimingat defects in the prior art, the invention provides the gypsum-based composite binding material for extruded 3D printing. The binding material is prepared from the following components: gypsum, pre-excited material, mineral additives, a plasticized water reducing agent, a waterproof agent, a crystal habit improver, a cystallizing stabilizer, a retarder, a dispersing agent, a water-retentive and thickening admixture, an adhesive, an antifoaming agent, a crystal modifier, a lubricating agent and fibers. The binding material disclosed by the invention has the beneficial effects that the preparedgypsum-based composite binding material for extruded 3D printing is wide in source, excellent in liquidity and environmentally friendly and has excellent extrusion continuity, constructability, mechanical property, water seepage resistance and cracking resistance.

Description

technical field [0001] The invention relates to the field of civil engineering / 3D printing materials, in particular to a gypsum-based composite gelling material for extrusion 3D printing and a preparation method thereof. Background technique [0002] 3D printing is a technology of manufacturing three-dimensional products by adding materials layer by layer through 3D printing equipment based on the designed 3D model. This layer-by-layer accumulation forming technology is also called additive manufacturing. 3D printing integrates cutting-edge technologies in many fields such as digital modeling technology, electromechanical control technology, information technology, material science and chemistry. It is a kind of rapid prototyping technology and is known as the core technology of the "third industrial revolution". Compared with traditional manufacturing technology, 3D printing does not need to make molds in advance, remove a large amount of material during the manufacturing p...

AI Technical Summary

Problems solved by technology

[0005] The existing gelling materials for printing have a long or too short bonding time, and the setting time cannot be freely adjusted to meet the requirements of printing and curing laminates, or they are solidified at the extrusion head during the printing process and cause blockage; fluidity and extrusion Extrusion-type printing is not coordinated, too large or too small will cause varying degrees of obstruction to extrusion-type printing; it is impossible to obtain early strength in a short time during the printing process, and it is difficult to ensure the continuation of printing; printing accuracy is poor, and high-precision buildings cannot be printed member

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