Investigation of the properties of alkali-activated slag mixes involving the use of nanoclay and nucleation seeds for 3D printing

Panda, B., Ruan, S., Unluer, C. and Tan, M. J. (2020) Investigation of the properties of alkali-activated slag mixes involving the use of nanoclay and nucleation seeds for 3D printing. Composites Part B: Engineering, 186, 107826. (doi: 10.1016/j.compositesb.2020.107826)

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This study investigated the properties of alkali activated slag (AAS) binders formulated for extrusion‐based 3D printing. The fresh properties of AAS mixes were tailored through the use of nanoclay (NC) and nucleation seeds. The printability criteria employed were the ease of extrusion (extrudability) and the stability of the layered structure (buildability). Introduction of 0.4% NC in AAS mixes led to improved thixotropic properties due to the flocculation effect, which accounted for the extrudability and shape fidelity of the binder. Inclusion of 2% hydromagnesite seeds in this mix design provided additional nucleation sites for the increased precipitation of hydrate phases, resulting in denser microstructures. This enhanced the hydration reaction and improved the structural build-up rate necessary for large-scale 3D printing. The developed AAS mix containing 0.4% NC and 2% hydromagnesite seeds was used in the printing of an actual 3D structure to demonstrate its feasibility to be used in 3D printing applications.

Item Type:Articles
Additional Information:The authors would like to acknowledge Sembcorp Architects & Engineers Pte. Ltd. and National Research Foundation (NRF) of Singapore for their funding and support of the work performed by Biranchi Panda and Ming Jen Tan. Shaoqin Ruan and Cise Unluer were supported by the Singapore MOE Academic Research Fund Tier 1 (RG 95/16).
Glasgow Author(s) Enlighten ID:Unluer, Dr Cise
Creator Roles:
Unluer, C.Supervision
Authors: Panda, B., Ruan, S., Unluer, C., and Tan, M. J.
College/School:College of Science and Engineering > School of Engineering
Journal Name:Composites Part B: Engineering
ISSN (Online):1879-1069
Published Online:30 January 2020
Copyright Holders:Copyright © 2020 Elsevier
First Published:First published in Composites Part B: Engineering 186:107826
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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