Evaluating the Influence of Aggregate Content on Pumpability of 3D Printable Concrete (2020-07)¶

10.1007/978-3-030-49916-7_34

Mohan Manu, Rahul Attupurathu, van Tittelboom Kim, de Schutter Geert
Contribution - Proceedings of the 2^nd RILEM International Conference on Concrete and Digital Fabrication, pp. 333-341

Abstract

3D concrete printing technology has gained huge momentum in the past two decades. The enhanced geometric freedom associated with 3D concrete printing could be beneficial for a variety of applications. However, the relatively high binder content in 3D printable concrete makes them less sustainable compared to mould-cast concrete. Therefore, developing printable mixtures with the required rheological behaviour combined with enhanced sustainability is very important. In this study, different concrete mixtures were prepared by replacing ordinary portland cement with ground granulated blast furnace slag. A polycarboxylate-ether-based superplasticizer and a cellulose-based viscosity modifying agent were used as chemical admixtures. A maximum aggregate size of 2mm was used, and the aggregate-to-binder ratio (a/b) was varied from 1.0 to 1.8 to reduce the binder amount. The designed mixtures were tested for their pumpability with a screw-based pump system allowing to measure the discharge rate and pumping pressure. The pumping pressure increases as the aggregate content increases. Rheological properties of these mixtures were determined by fitting to the Bingham model. The yield stress and viscosity were found to increase with an increase in the aggregate content of the mixtures.

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12 References

24 Citations

BibTeX

@inproceedings{moha_rahu_titt_schu.2020.EtIoACoPo3PC,
  author            = "Manu K. Mohan and Attupurathu Vijayan Rahul and Kim van Tittelboom and Geert de Schutter",
  title             = "Evaluating the Influence of Aggregate Content on Pumpability of 3D Printable Concrete",
  doi               = "10.1007/978-3-030-49916-7_34",
  year              = "2020",
  volume            = "28",
  pages             = "333--341",
  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

M. K. Mohan, A. V. Rahul, K. van Tittelboom and G. de Schutter, “Evaluating the Influence of Aggregate Content on Pumpability 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. 333–341. doi: 10.1007/978-3-030-49916-7_34.

CMOS

Mohan, Manu K., Attupurathu Vijayan Rahul, Kim van Tittelboom, and Geert de Schutter. “Evaluating the Influence of Aggregate Content on Pumpability 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, 28:333–41, 2020. https://doi.org/10.1007/978-3-030-49916-7_34.