3D printing of geopolymer-based concrete for building applications
ISSN: 1355-2546
Article publication date: 23 September 2020
Issue publication date: 28 November 2020
Abstract
Purpose
Three-dimensional (3D) printing technology allows geometric complexity and customization with a significant reduction in the structural environmental impact. Nevertheless, it poses a serious threat to the environment when organic binders are used. Binder jet printing of alkali-activated geopolymer precursor can represent a successful and environmental-friendly alternative.
Design/methodology/approach
The present work reports about the successful 3D printing of metakaolin-based alkali-activated concrete, with dimensional integrity and valuable mechanical behavior.
Findings
The geometric behavior was studied as a function of alkali activator flow rate, and the minimum geometric deviation with complete saturation was recorded at 103 mg/s. The printed specimen is characterized by a modulus of rupture as high as 4.4 MPa at 135 mg/s.
Practical implications
The 3D printed geopolymer-based concrete can be potentially used in a wide range of structural applications from construction to thermal insulation elements.
Originality/value
The analysis of the 3D geopolymer-based concrete printing system and material conducted in this paper is original.
Keywords
Acknowledgements
This research work was supported by grants from the Department of Industrial Engineering at The University of Trento, Italy. The support provided is gratefully acknowledged.
Citation
Ur Rehman, A. and Sglavo, V.M. (2020), "3D printing of geopolymer-based concrete for building applications", Rapid Prototyping Journal, Vol. 26 No. 10, pp. 1783-1788. https://doi.org/10.1108/RPJ-09-2019-0244
Publisher
:Emerald Publishing Limited
Copyright © 2020, Emerald Publishing Limited