Abstract
Currently, there are many revolutionary technologies in construction, among which a significant place is occupied by construction 3D printing. It attracts an increasing number of researchers and entrepreneurs. However, the creation of effective compositions for this technology is still an urgent issue, as these mixtures must have a number of required characteristics: high plasticity during extrusion and low fluidity after laying the mixture, as well as a high setting speed. The results of research on the preparation of composite binders based on Portland cement using a superplasticizer and a hardening accelerator are presented. To reduce the energy intensity and cost of production, wet magnetic separation dropouts of metallurgical production were added to the compositions. Optimal dosages of the accelerator additive and superplasticizer when used together were established. A comprehensive study of the samples was performed using x-ray phase analysis and electron microscopy. A two-factor mathematical model of the obtained composite binders is proposed using regression equations and the optimal composition is selected for construction 3D printing. Energy-efficient, cost-effective compositions were obtained that have the required characteristics for workability in 3D printing, as well as a high speed of setting and hardening with guaranteed strength characteristics. A technological solution for the introduction of hardening accelerators directly during extrusion is proposed.
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Glagolev, E.S., Lesovik, V.S., Zagorodnyuk, L.H., Podgornyi, D.S. (2021). Composite Binders and Dry Building Mixes for 3D Additive Technologies. In: Klyuev, S.V., Klyuev, A.V. (eds) Proceedings of the International Conference Industrial and Civil Construction 2021. ICICC 2021. Lecture Notes in Civil Engineering, vol 147. Springer, Cham. https://doi.org/10.1007/978-3-030-68984-1_34
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DOI: https://doi.org/10.1007/978-3-030-68984-1_34
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