Abstract
The results of the study of the theoretical foundations of the manufacture of building materials using 3D printing based on composite binders with various molding methods and their practical testing on prototypes of fine-grained concrete are presented. The principles of regulating the structure and properties of composites through the use of a mineral modifier for the construction of high-rise building objects using 3D-additive technology are considered. The influence of the characteristics of the raw material components on the properties of the obtained composite is shown. The structure formation of the hardening cement-containing system in the presence of a mineral modifier proceeds more intensively due to the high specific surface area and energy capacity of the components, which is an active mineral additive and the basis for the crystal formation of new hydrate compounds. The difference in the strength characteristics of the printed wall is due to the direction of the sample cut. Applying a breaking load along the direction of forming of a 3D printer gives a slightly higher strength than perpendicular to the direction of forming. This phenomenon can be explained by the shape of the layer after solidification of the mixture, which is an ellipse in cross section
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