A Compendious Rheo-Mechanical Test for Printability-Assessment of 3D Printable Concrete (2020-07)¶

10.1007/978-3-030-49916-7_20

Cho Seung, Kruger Jacques, Bester Frederick, van den Heever Marchant, van Rooyen Algurnon, van Zijl Gideon
Contribution - Proceedings of the 2^nd RILEM International Conference on Concrete and Digital Fabrication, pp. 196-205

Abstract

A successful 3D concrete print (3DCP) is controlled by a sound buildability and good pumpability. Since both factors rely on the behavior of concrete in the fresh state, rheological assessment is crucial prior to 3DCP. In a previous study done by Roussel [1], a correlation of numerical simulation of ASTM mini-slump cone flow and rheometer results was successfully addressed. As the model solely considers material flow under gravitational loading, this model can be adjusted with an external source of energy in the form of impact loading by vertical drop from a certain height to emulate the agitation and deposition process of 3DCP. A flow table and rheometer tests were executed with 5 samples of different consistency. Consecutively, 3DCP validation was performed except for the sample with no superplasticizer content. The study shows the relative deformation (%) varied in a range of 34% - 89% after the drops according to the consistency of the sample. The initial static and dynamic yield stresses are also presented in a range of 0.94–6.82 kPa and 0.54–4.73 kPa respectively. Based on the results, flow table reading ranges are suggested for suitable 3D printability.

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4 References

37 Citations

BibTeX

@inproceedings{cho_krug_best_heev.2020.ACRMTfPAo3PC,
  author            = "Seung Cho and Jacques Pienaar Kruger and Frederick A. Bester and Marchant van den Heever and Algurnon Steve van Rooyen and Gideon Pieter Adriaan Greeff van Zijl",
  title             = "A Compendious Rheo-Mechanical Test for Printability-Assessment of 3D Printable Concrete",
  doi               = "10.1007/978-3-030-49916-7_20",
  year              = "2020",
  volume            = "28",
  pages             = "196--205",
  booktitle         = "Proceedings of the 2nd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2020",
  editor            = "Freek Paul Bos and Sandra Simaria de Oliveira Lucas and Robert Johannes Maria Wolfs and Theo A. M. Salet",
}

Formatted Citation

IEEE

S. Cho, J. P. Kruger, F. A. Bester, M. van den Heever, A. S. van Rooyen and G. P. A. G. van Zijl, “A Compendious Rheo-Mechanical Test for Printability-Assessment of 3D Printable Concrete”, in Proceedings of the 2^nd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2020, 2020, vol. 28, pp. 196–205. doi: 10.1007/978-3-030-49916-7_20.

CMOS

Cho, Seung, Jacques Pienaar Kruger, Frederick A. Bester, Marchant van den Heever, Algurnon Steve van Rooyen, and Gideon Pieter Adriaan Greeff van Zijl. “A Compendious Rheo-Mechanical Test for Printability-Assessment of 3D Printable Concrete”. In Proceedings of the 2^nd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2020, edited by Freek Paul Bos, Sandra Simaria de Oliveira Lucas, Robert Johannes Maria Wolfs, and Theo A. M. Salet, 28:196–205, 2020. https://doi.org/10.1007/978-3-030-49916-7_20.