Composite magnesium oxysulfate cementing material used for 3D printing as well as preparation method and application of composite magnesium oxysulfate cementing material

Abstract

The invention belongs to the technical field of gel materials, in particular relates to a composite magnesium oxysulfate cementing material used for 3D printing, and further discloses a preparation method and application of the composite magnesium oxysulfate cementing material. The composite magnesium oxysulfate cementing material is formed by adopting a magnesium oxysulfate cementing material (MOS) and aggregate, wherein the magnesium oxysulfate cementing material is composed of magnesium oxysulfate cement, a water reducing agent, a binder, a reinforcing agent, a retarder, a water repellent and glass fibers, and the aggregate is fine aggregate composed of talc powder and dolomite powder. Compared with an ordinary Portland cement material for 3D printing, the composite magnesium oxysulfatecementing material provided by the invention has good cohesiveness, plasticity, extrudability and continuity, and the advantages of good mechanical properties, a light weight, high strength, high early strength, good later strength, good cohesiveness, good carbonization resistance and strong resistance to erosion of various soluble salts, can meet the performance requirements of 3D printing products and can be applied to a 3D printing technology.

Description

Technical field

[0001] The invention belongs to the technical field of gel materials, and specifically relates to a composite magnesium oxysulfide gelling material for 3D printing, and further discloses its preparation method and application. Background technique

[0002] 3D printing technology is based on digital model files, using powdered metal or plastic and other bondable materials to construct objects by printing layer by layer. Nowadays, 3D printing technology has been widely used in many fields, such as military field, biomedical field, housing construction field, etc.

[0003] However, the limitation of materials used in 3D printing technology has become a key factor restricting the development of 3D printing technology. At present, the 3D printing materials used are basically limited to plastics, certain metals or ceramic materials. In addition, the application of cementitious materials in the 3D printing industry is also very popular, but due to the particularity of the...

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