DEVELOPMENT OF SOLUTIONS FOR 3D PRINTING BASED ON THE SYSTEM OF BINDING SUBSTANCES CaO−Al2O3−SO3−H2O

Problem statement. The world is developing, which brings changes. Construction technologies and materials are also undergoing changes. Modern and efficient construction methods must be used to restore the infrastructure as soon as possible and eliminate the consequences of the war. In the construction of new structures, technologies can already be implemented that work to reduce construction time, increase the service life of building structures, reduce labor and resource costs, and achieve economic benefits. Due to the fact that 3D printing in construction is still a new technology and does not have clear regulatory requirements, the development of the composition of mixtures is an important aspect in the world of building materials. Purpose of the study is to reveal the innovative technology of 3D printing in construction, to provide its advantages and disadvantages in operation. Develop solutions for 3D printing based on the CaO–Al2O3–SO3–H2O binder system. Show the effect of additives on the physical and mechanical properties of solutions. Conclusion. 3D printing technology in construction was analyzed, its advantages and disadvantages were provided. Experimental laboratory studies were carried out for the development of binder composites for 3D printing solutions. Research results show a significant reduction in the hardening time of the composite and an increase in its strength capabilities at an early design age due to the use of additives. Accelerator Mapei Mapequick AFK 777 accelerated the end of hardening from 1 day to 6 minutes, i.e. 240 times, and the presence of nanopowder, namely taurite, increased the compressive strength of the binder by 4 times. Sika ViscoCrete G2 superplasticizer maintained the necessary fluidity of the binder without increasing the water-hardening ratio when other additives were added.