3D printing of beams with the possibility of transverse reinforcement, considering the peculiarities of the construction printer

Abstract

3D printing of load-bearing structuresis creating rapid changes in the construction industry. New opportunities for building complex architectural forms are emerging, and the speed and quality of work is accelerating. But don't forget about the production specifics of this latest technology. An important detail that many people forget about is that 3D printing with concrete or mortar requires the use of some kind of reinforcement, and there are still nostandards for solving this issue. This is ensured by the use of construction 3D printers, which allow for complex operations both at industrial factories and directly at the construction site. However, despite all the advantages of this technology, there are also a number of challenges due to insufficient optimisation of new systems. The required stiffness of the structures is not achieved due to the absence of a spatial reinforcement structure, which should be provided by vertical reinforcement ties (transverse reinforcement). The article presents a solution to the problem of transverse reinforcement in 3D printing of load-bearing beams, proposed and performed by the authors. To implement the task, design drawings of test beam structures were developed. The article presents the design of the beams and the sequence of their production by 3D printing. The beams were manufactured, according to the sequence of work developed by the authors of the article, by the Ukrainian company 3D TECHNOLOGY UTU LLC. The work resulted in the development of a technology for manufacturing beams with the possibility of reinforcingthem with a vertical welded cage in the design position. To determine the physical and mechanical characteristics of the materials, samples of cubes andprisms, as well as reinforcement, were made. The proposed technology of printing beams using a construction 3D printer made it possible to producestructures that meet the previously developed design and technological solutions and made it possible toplace transverse frames in the design position, which allows the structure to take not only bending moments but also transverse forces.