Improving Inter-Layer Bond in 3D Printed Concrete Through Induced Thermo-Hydrokinetics (2023-06)¶

10.1016/j.conbuildmat.2023.132121

Munemo Rue, Kruger Jacques, van Zijl Gideon
Journal Article - Construction and Building Materials, Vol. 393, No. 132121

Abstract

For 3D printable concrete, lack of interlayer adhesion (IA) is an important consideration. This paper presents an experimental study to investigate a novel method to mitigate lack of IA by enhancing the interlayer bond strength through induced thermo-hydrokinetics. Thermo-hydrokinetics in this study describe the motions of heated fluids and/or the forces which produce or affect such motions. Thermo-hydrokinetics were induced by steaming the interlayer region of a substrate right before placement of a fresh filament layer. The method is applied at 3 different pass times; typical pass time for the arbitrarily selected object for printing, 5 min, and 10 min. A control for each pass time, on which thermo-hydrokinetics were not induced is also obtained. Direct tensile tests are performed to quantify the interlayer bond strength (IBS) of printed specimens. The experimental results show that inducing thermo-hydrokinetics in the interlayer region, even with increasing pass times, is beneficial for the tensile performance of the printed specimen. Steamed tensile specimens showed superior mechanical performance, achieving a 28-day overall mean IBS value of 2.8 MPa, which was a 78 % increase from that of non-steamed tensile specimens. The strength development of the specimens was also quantified, and it was shown that the rate of strength development for the steamed regime specimens was greater than that of the non-steamed regime. Furthermore, scanning electron microscope images provided information into the material in the interlayer region, illustrating that induced thermo-hydrokinetics altered the material in the interlayer region.

¶

32 References

26 Citations

BibTeX

@article{mune_krug_zijl.2023.IILBi3PCTITH,
  author            = "Rue Munemo and Jacques Pienaar Kruger and Gideon Pieter Adriaan Greeff van Zijl",
  title             = "Improving Inter-Layer Bond in 3D Printed Concrete Through Induced Thermo-Hydrokinetics",
  doi               = "10.1016/j.conbuildmat.2023.132121",
  year              = "2023",
  journal           = "Construction and Building Materials",
  volume            = "393",
  pages             = "132121",
}

Formatted Citation

IEEE

R. Munemo, J. P. Kruger and G. P. A. G. van Zijl, “Improving Inter-Layer Bond in 3D Printed Concrete Through Induced Thermo-Hydrokinetics”, Construction and Building Materials, vol. 393, p. 132121, 2023, doi: 10.1016/j.conbuildmat.2023.132121.

CMOS

Munemo, Rue, Jacques Pienaar Kruger, and Gideon Pieter Adriaan Greeff van Zijl. “Improving Inter-Layer Bond in 3D Printed Concrete Through Induced Thermo-Hydrokinetics”. Construction and Building Materials 393 (2023): 132121. https://doi.org/10.1016/j.conbuildmat.2023.132121.