Ardealite premixed dry-mixed mortar capable of being used for 3D printing

Abstract

The invention provides ardealite premixed dry-mixed mortar capable of being used for 3D printing. The ardealite premixed dry-mixed mortar capable of being used for 3D printing is prepared from, by weight, 500-600 parts of dihydrate gypsum, 400-500 parts of aggregate, 30-50 parts of coal ash, 0.2-0.8 part of redispersible powder, 0.2-0.3 part of foaming agents, 1-1.5 parts of retarder and 0.5-0.7 part of water-retaining agents. The ardealite premixed dry-mixed mortar capable of being used for 3D printing is high in compressive strength, good in hydrolytic performance and capable of being used as an interior wall material as well as an exterior wall material and being applied to a load bearing wall, in particular to the construction in which the 3D printing technology can be adopted.

Description

technical field [0001] The invention relates to the field of mortar, in particular to a phosphogypsum ready-mixed dry-mixed mortar that can be used for 3D printing. Background technique [0002] Phosphogypsum is the waste residue produced when sulfuric acid is used to treat phosphate rock in the production of phosphoric acid. Phosphogypsum is a powdery material with almost no plasticity, so most of the treatment methods are piled up. The massive accumulation of phosphogypsum not only encroached on a large amount of land resources, but also polluted the atmosphere, water system and soil due to wind erosion, rain erosion and other reasons. How to effectively deal with phosphogypsum industrial waste is an urgent problem to be solved at home and abroad. [0003] In the prior art, someone has proposed a method of using phosphogypsum to make PC components of mortar wall parts or print the whole house to solve the accumulation problem of phosphogypsum. The principle is that phosph...

AI Technical Summary

Problems solved by technology

[0004] The gypsum ready-mixed dry-mixed mortar made by traditional production technology has a very obvious defect, that is, the compressive strength is very low

The compressive strength of gypsum ready-mixed mortar made by the traditional gypsum production method is generally only about 4.5. In construction operations, it can only be used for partition walls or filling walls, and cannot be used as load-bearing walls.

Moreover, the traditional gypsum ready-mixed dry-mixed mortar is limited by the disadvantage that gypsum is not water-resistant, and its water resistance is very poor. Therefore, the traditional gypsum ready-mixed dry-mixed mortar cannot be used as an exterior wall material, which further limits the use of industrial phosphogypsum. Application of building wall materials

[0005] Furthermore, the traditional gypsum ready-mixed dry-mixed mortar is limited by the physical and chemical properties of the mortar. In the specific construction process, only manual construction can be used, because the physical and chemical properties of the traditional gypsum ready-mixed dry-mixed mortar such as viscosity, initial setting, and final setting time The parameters do not meet the requirements and cannot be applied to 3D printing robots, and the PC components of the whole house or wall parts can be printed on site, which greatly limits its application

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