Engineering Mechanics

Proceedings Vol. 31 (2025)

ENGINEERING MECHANICS 2025

Copyright © 2025 Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, Prague

 

Hlaváček P., Wolf C., Robens-Radermacher A., Kühne H.-C.
pages 225 - 228, full text

This work focuses on developing the 3D printing process of concrete using powder bed technology, with an emphasis on the mechanical properties of the printed samples. Parallelly, a topology optimization strategy is applied to reduce the material needed for the customised production of structurally complex lightweight construction elements. The powder bed technology ensures almost complete freedom of shaping with the loss-free use of dry mortar powder, making the optimised design practically feasible. Optimization of material and technology for 3D powder bed printing is discussed in terms of overall porosity, particle and pore size, flowability, pourability, bulk density and wettability of the powder used, as well as the type and speed of the recoater, the amount of activator solution and droplet size and flow rate of the activator solution. The strength of printed samples for handling, shape accuracy and final strength after hardening are considered as governing parameters for the material and process development.

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All papers were reviewed by members of the scientific committee.