3D Concrete Printing of fibre reinforced concrete for structural testing

This activity presents the additive manufacturing of cement-based specimens reinforced with steel fibres. The samples are produced layer by layer using a robotic extrusion process, in which parameters such as layer height, deposition rate, and, in particular, the time interval between layers are controlled. These parameters directly influence the bond between successive layers, which is a key aspect of structural performance in 3DCP.

The printed elements are designed to evaluate interlayer strength. A constant fibre dosage is used, while varying layer time intervals are considered to assess their influence on mechanical behaviour across layer interfaces. The resulting material exhibits anisotropic properties, with strength and stiffness depending on the printing direction.

The work is part of two master’s thesis projects carried out in collaboration with colleagues in structural mechanics. During the visit, you will be able to observe the printing process and the testing setup used to characterise interlayer performance.