Volume: 2, 2023
2nd International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland:
ENVIRONMENT – PLANT – ANIMAL – PRODUCT
Abstract number: T069
DOI: https://doi.org/10.24326/ICDSUPL2.T069
Published online: 19 April 2023
ICDSUPL, 2, T069 (2023)
Fracture mechanics of 3D printed cement-based composites
Wojciech Zbyszyński1*, Daniel Pietras2, Tomasz Sadowski2
1 Civil Engineering Laboratory, Lublin University of Technology, Nadbystrzycka 40 Str., 20-618 Lublin, Poland
2 Department of Solid Mechanics, Lublin University of Technology, Nadbystrzycka 40 Str., 20-618 Lublin, Poland
* Corresponding author: w.zbyszynski@pollub.pl
Abstract
The 3D concrete printing (3DCP) is a method used as a process of an Additive Manufacturing (AM) with specialized cement-based mixtures. Currently the 3DCP technology aims mainly at the process of rising vertical elements of the buildings, such as inner and outer walls. The wall elements manufactured by this method are mainly loaded by axial compression with addition of a low fraction of bending. Although the materials used in this process provide the required compressive strength of the elements, additional ability of elements to be able to carry tensile loading is necessary for 3DCP process to be viable for civil engineering purposes. Moreover, ability to withstand the tensile loading will improve this technology and allow for creation of longitudinal elements, without need for additional support. Therefore the use of smeared reinforcement in the composition of used cement-based mixture and interlayer polymeric mesh reinforcement was proposed. The used reinforcement improves the properties of the composite by providing the additional tensile strength. Furthermore the reinforcement changes the behaviour of the material during process of destruction. During three point bending test (3PB), under the condition of Loading-Unloading-Reloading-Process (LURP), after failure of brittle material, the reinforcement exhibits residual strength of up to 50% of the cement based material’s failure loads. Moreover process of layer cracking was observed and the results indicate that the process occurs subsequently layer by layer and the failure in different layers develops as independent process including cracks arresting.
How to cite
W. Zbyszyński, D. Pietras, T. Sadowski, 2023. Fracture mechanics of 3D printed cement-based composites. In: 2nd International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland: Environment – Plant – Animal – Product. https://doi.org/10.24326/ICDSUPL2.T069