From casting to 3D printing geopolymers: A proof of concept
OPEN ACCESS
Author / Producer
Date
2021-03
Publication Type
Journal Article
ETH Bibliography
yes
Citations
Altmetric
OPEN ACCESS
Data
Abstract
The objective of this paper is to define a mix design strategy allowing the implementation of geopolymer in powder bed 3D printing. In a selective binder approach, an aluminosilicate powder bed is activated through the deposit of an alkaline silicate solution. We first show that, in comparison to casting, this technology requires mastering the spreading of the liquid into the powder bed to ensure that the reaction takes place where it is needed. A series of experiments at the drop level, mimicking the 3D printing process, were performed to determine the printing solution composition for a given powder bed packing. We then highlight the relationship between the compressive strength of the printed geopolymer and the powder bed saturation, controlled by the printing parameters. Finally, SEM/EDX analysis confirm the formation of geopolymer with desired Si/Al and Na/Al ratios in the resulting printed material.
Permanent link
Publication status
published
Editor
Book title
Journal / series
Volume
143
Pages / Article No.
106374
Publisher
Elsevier
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Powder bed 3D printing; Geopolymers; Mix design; Sustainability
Organisational unit
03972 - Habert, Guillaume / Habert, Guillaume
09566 - Dillenburger, Benjamin / Dillenburger, Benjamin
02284 - NFS Digitale Fabrikation / NCCR Digital Fabrication
02655 - Netzwerk Stadt u. Landschaft ARCH u BAUG / Network City and Landscape ARCH and BAUG
Notes
Funding
169359 - Scaling up of clay binders for building materials (SNF)