Development of a Comprehensive Solution for 3d Printing of Wall Structures

Abstract

Construction 3D printing is one of the advanced construction technologies in the era of widespread digitalization. The main idea of construction printing is to create a finished product or structure with one installation according to a given digital model. One of the obstacles to widespread implementation is the lack of integrated solutions for the construction of printed walls, ensuring the fulfillment of both structural and thermal engineering requirements, as well as the lack of available materials that allow obtaining mixtures for construction printing, maximally optimized for the features of a 3D printer. At the same time, an important condition for the commercial attractiveness of 3D technologies is the minimization of initial costs, as well as the availability of raw materials that contribute to their development by small and medium-sized businesses. The article offers a comprehensive solution for the development and creation of wall structures, consisting in alternating printing with one device (in different modes) of a fixed formwork made of fine-grained concrete with filling the interior space with a foam concrete mixture based on gypsum cement binder. This solution ensures the fulfillment of structural and thermal engineering requirements based on available standard components (commodity binders), maximally optimized for the features of the construction printer.