Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/85332
Title: The effect of material fresh properties and process parameters on buildability and interlayer adhesion of 3D printed concrete
Authors: Panda, Biranchi
Noor Mohamed, Nisar Ahamed
Paul, Suvash Chandra
Bhagath Singh, GVP
Tan, Ming Jen
Šavija, Branko
Keywords: Engineering::Mechanical engineering
3D Concrete Printing
Thixotropy
Issue Date: 2019
Source: Panda, B., Noor Mohamed, N. A., Paul, S. C., Bhagath Singh, G., Tan, M. J., & Šavija, B. (2019). The Effect of Material Fresh Properties and Process Parameters on Buildability and Interlayer Adhesion of 3D Printed Concrete. Materials, 12(13), 2149-. doi:10.3390/ma12132149
Series/Report no.: Materials
Abstract: The advent of digital concrete fabrication calls for advancing our understanding of the interaction of 3D printing with material rheology and print parameters, in addition to developing new measurement and control techniques. Thixotropy is the main challenge associated with printable material, which offers high yield strength and low viscosity. The higher the thixotropy, the better the shape stability and the higher buildability. However, exceeding a minimum value of thixotropy can cause high extrusion pressure and poor interface bond strength if the printing parameters are not optimized to the part design. This paper aims to investigate the effects of both material and process parameters on the buildability and inter-layer adhesion properties of 3D printed cementitious materials, produced with different thixotropy and print head standoff distances. Nano particles are used to increase the thixotropy and, in this context, a lower standoff distance is found to be useful for improving the bond strength. The low viscosity “control” sample is unaffected by the variation in standoff distances, which is attributed to its flowability and low yield stress characteristics that lead to strong interfacial bonding. This is supported by our microscopic observations.
URI: https://hdl.handle.net/10356/85332
http://hdl.handle.net/10220/49794
ISSN: 1996-1944
DOI: http://dx.doi.org/10.3390/ma12132149
Rights: © 2019 by the Authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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metadata.item.fulltext: With Fulltext
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