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Rheology Evaluation of Cement-Paste with Nano-Clay , Nano-Silica and Polymeric Admixtures for Digital Fabrication (2020-07)

10.1007/978-3-030-49916-7_15

 Varela Hugo,  Barluenga Gonzalo,  Palomar Irene
Contribution - Proceedings of the 2nd RILEM International Conference on Concrete and Digital Fabrication, pp. 144-152

Abstract

Additive and digital manufacturing have opened wide new opportunities in architectonic design with cement based materials. However, there are still some issues to be addressed regarding rheological properties’ control. Among rheology modifiers, nanoclays, nanosilica and polymeric admixtures can be used to adjust rheological properties of cement paste, as yield stress, viscosity and thixotropy. These rheological properties are a key factor to control technological requirements as pumpability, extrudability and buildability. An experimental study was carried out to evaluate the combined effects of nanoclays, nanosilica and polymeric admixtures on cement paste rheology for digital fabrication, considering their interactions and synergies. A reference paste with ordinary Portland cement blended with limestone filler, 2:1 by cement weight, and a low water to binder ratio was designed. Then, four different nanoclays - attapulgite, bentonite and two types of sepiolite-, a commercial nanosilica, two types of viscosity modifying admixtures (VMA) and a high range water reducing admixture (HRWRA) were added. Flowability of cement pastes was assessed with the minicone slump test and the synergetic effect and interactions between nanoclays, nanosilica and polymeric admixtures were evaluated.

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BibTeX 
@inproceedings{vare_barl_palo.2020.REoCPwNCNSaPAfDF,
  author            = "Hugo Varela and Gonzalo Barluenga and Irene Palomar",
  title             = "Rheology Evaluation of Cement-Paste with Nano-Clay , Nano-Silica and Polymeric Admixtures for Digital Fabrication",
  doi               = "10.1007/978-3-030-49916-7_15",
  year              = "2020",
  volume            = "28",
  pages             = "144--152",
  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

H. Varela, G. Barluenga and I. Palomar, “Rheology Evaluation of Cement-Paste with Nano-Clay , Nano-Silica and Polymeric Admixtures for Digital Fabrication”, in Proceedings of the 2nd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2020, 2020, vol. 28, pp. 144–152. doi: 10.1007/978-3-030-49916-7_15.

Varela, Hugo, Gonzalo Barluenga, and Irene Palomar. “Rheology Evaluation of Cement-Paste with Nano-Clay , Nano-Silica and Polymeric Admixtures for Digital Fabrication”. In Proceedings of the 2nd 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, 28:144–52, 2020. https://doi.org/10.1007/978-3-030-49916-7_15.