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Rheological and Water Transport Properties of Cement Pastes Modified with Diutan Gum and Attapulgite/Palygorskite Nanoclays for 3D Concrete Printing

  • Siwei Ma
  • Shiho KawashimaEmail author
Conference paper
Part of the RILEM Bookseries book series (RILEM, volume 19)

Abstract

This paper identifies and addresses two challenges in extrusion-based 3D concrete printing from a materials perspective. The first is the effect of self-weight and the weight of subsequent layers on structural build-up. And the second is the excessive water loss of printed materials due to the absence of formwork. Viscosity modifying admixtures (VMAs) are extensively used in cement-based 3D printing projects to achieve sufficient print quality, shape stability, and printability window. This study aims to evaluate VMAs’ effects on the two aforementioned challenges through investigating the evolution of static yield stress under sustained stress at rest and water retention capacity of cement pastes modified with nanoclay and diutan gum.

Keywords

Sustained stress Yield stress Water retention Nanoclay Diutan gum 

Notes

Acknowledgments

The authors would like to acknowledge the Thornton Tomasetti Student Innovation Fellowship for financial support, and technical support by the staff of Columbia University’s Carleton Laboratory.

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Copyright information

© RILEM 2019

Authors and Affiliations

  1. 1.Department of Civil Engineering and Engineering MechanicsColumbia UniversityNew YorkUSA

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