The Environment’s Effect on the Inter-Layer Bond Strength of 3D Printed Concrete (2022-06)¶

10.1007/978-3-031-06116-5_33

Moelich Gerrit, van Rensburg Johannes, Kruger Jacques, Combrinck Riaan
Contribution - Proceedings of the 3^rd RILEM International Conference on Concrete and Digital Fabrication, pp. 222-227

Abstract

Estimating the bond strength between extruded concrete filaments is of paramount importance for the structural design of 3D printed concrete elements. This study investigates the effect of the environmental printing conditions at various pass times on the interlayer bond strength (IBS), elaborates on the underlying mechanism and investigates a possible mitigation measure. Elements are printed with seven different pass times ranging from 1 min to 30 min while exposed to a benign (indoor-like) and severe (site-like) evaporation rates. The IBS is quantified through flexure tests, with the interlayer aligned vertically, at a concrete age of 28 days. The experimental results show that increasing the pass time from 1 min to 30 min decreases the IBS by 107% for the benign condition. When the specimens were exposed to the severe evaporation rate for 30 min the IBS decreased an additional 35% . Applying a curing compound to the exposed filament surface, to reduce the moisture evaporation, weakened the bond strength.

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13 References

4 Citations

BibTeX

@inproceedings{moel_rens_krug_comb.2022.TEsEotILBSo3PC,
  author            = "Gerrit Marius Moelich and Johannes Jacobus Janse van Rensburg and Jacques Pienaar Kruger and Riaan Combrinck",
  title             = "The Environment’s Effect on the Inter-Layer Bond Strength of 3D Printed Concrete",
  doi               = "10.1007/978-3-031-06116-5_33",
  year              = "2022",
  volume            = "37",
  pages             = "222--227",
  booktitle         = "Proceedings of the 3rd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2022",
  editor            = "Richard A. Buswell and Ana Blanco and Sergio Cavalaro and Peter Kinnell",
}

Formatted Citation

IEEE

G. M. Moelich, J. J. J. van Rensburg, J. P. Kruger and R. Combrinck, “The Environment’s Effect on the Inter-Layer Bond Strength of 3D Printed Concrete”, in Proceedings of the 3^rd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2022, 2022, vol. 37, pp. 222–227. doi: 10.1007/978-3-031-06116-5_33.

CMOS

Moelich, Gerrit Marius, Johannes Jacobus Janse van Rensburg, Jacques Pienaar Kruger, and Riaan Combrinck. “The Environment’s Effect on the Inter-Layer Bond Strength of 3D Printed Concrete”. In Proceedings of the 3^rd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2022, edited by Richard A. Buswell, Ana Blanco, Sergio Cavalaro, and Peter Kinnell, 37:222–27, 2022. https://doi.org/10.1007/978-3-031-06116-5_33.