The Method of the Overlap Device for Buildings Erected Using a 3D Printer

When constructing buildings by the method of layer-by-layer printing for wall construction, the technological process usually does not raise questions, the same cannot be said about the construction of an overlap or other horizontal bearing element. Basically, horizontal load-bearing elements are being tried to be erected in the traditional way using formwork. As part of the implementation of the state task, a new approach has been proposed for the installation of floors made of mortar mixtures. It is proposed to use the mortar mixture for 3D printing of the overlap with partial replacement of the cement binder with aleuropelite with simultaneous use of a viscosity modifier in the form of methocoline. For the construction of low-rise buildings, a 3D printer has been selected of a portal type, the design of which provides for the presence of a “mortar extruder” with 3 nozzles feeding the mortar mixture. Behind the “mortar extruder” there is a “reinforcement extruder”, whose stepper motors supply reinforcement wire from the coil to reinforce the structure. It is proposed to divide the overlap disk into so-called “rotary segments”, which are printed on a turntable provided in the design of the printer itself. The segment is printed in a horizontal position, and when the required strength is reached, it is installed in the design position using the same turning pad. The weight of the overlap segments in this case does not exceed 400 kg (with spans up to 5 meters), therefore it does not require additional lifting and transport mechanisms. After the formation of the overlap disk from the “turning segments”, the upper seams between them are caulked with a mortar mixture, combining the structure into a single whole.