Investigation on the Rheological Behavior of Lightweight Foamed Concrete for 3D Printing Applications (2020-07)¶

10.1007/978-3-030-49916-7_25

Falliano Devid, Crupi Giuseppe, de Domenico Dario, Ricciardi Giuseppe, Restuccia Luciana, Ferro Giuseppe, Gugliandolo Ernesto
Contribution - Proceedings of the 2^nd RILEM International Conference on Concrete and Digital Fabrication, pp. 246-254

Abstract

Unlike ordinary concrete, lightweight foamed concrete (LWFC) has the benefit of decreasing the self-weight of constructive elements while ensuring an efficient thermal insulation and acoustic absorption as well as high fire resistance. A novel version of LWFC has been recently developed by the authors, with the unique property of “extrudability” in a wide density range, meaning that its production process can be carried out without formworks and exploiting innovative 3D printing technologies. The present contribution is focused on the rheological behaviour of this innovative extrudable LWFC (ELWFC). The rheological behaviour in terms of yield stress of the ELWFC is studied via a rotational rheometer in two different modalities, namely constant shear rate and increasing shear rate. Comparison of the rheological behaviour between ELWFC and classical LWFC is also presented. Additionally, the dimensional stability of the cementitious paste at the fresh state having a given yield stress is assessed through an extrusion test. In particular, the experimental investigation is focused on a target dry density of 800 kg/m3, which is identified as a good compromise between insulating features and mechanical strengths. The experimental results show that the considered ELWFC, characterized by a zero slump in the extrusion test, has a yield stress of around 150 Pa (constant shear rate) and 130 Pa (increasing shear rate).

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8 References

19 Citations

BibTeX

@inproceedings{fall_crup_dome_ricc.2020.IotRBoLFCf3PA,
  author            = "Devid Falliano and Giuseppe Crupi and Dario de Domenico and Giuseppe Ricciardi and Luciana Restuccia and Giuseppe Andrea Ferro and Ernesto Gugliandolo",
  title             = "Investigation on the Rheological Behavior of Lightweight Foamed Concrete for 3D Printing Applications",
  doi               = "10.1007/978-3-030-49916-7_25",
  year              = "2020",
  volume            = "28",
  pages             = "246--254",
  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

D. Falliano, “Investigation on the Rheological Behavior of Lightweight Foamed Concrete for 3D Printing Applications”, in Proceedings of the 2^nd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2020, 2020, vol. 28, pp. 246–254. doi: 10.1007/978-3-030-49916-7_25.

CMOS

Falliano, Devid, Giuseppe Crupi, Dario de Domenico, Giuseppe Ricciardi, Luciana Restuccia, Giuseppe Andrea Ferro, and Ernesto Gugliandolo. “Investigation on the Rheological Behavior of Lightweight Foamed Concrete for 3D Printing Applications”. 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, 28:246–54, 2020. https://doi.org/10.1007/978-3-030-49916-7_25.