The effect of material fresh properties and process parameters on buildability and interlayer adhesion of 3D printed concrete

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...

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Main Authors: Panda, Biranchi, Noor Mohamed, Nisar Ahamed, Paul, Suvash Chandra, Bhagath Singh, GVP, Tan, Ming Jen, Šavija, Branko
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2019
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Online Access:https://hdl.handle.net/10356/85332
http://hdl.handle.net/10220/49794
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-853322023-03-04T17:15:09Z The effect of material fresh properties and process parameters on buildability and interlayer adhesion of 3D printed concrete Panda, Biranchi Noor Mohamed, Nisar Ahamed Paul, Suvash Chandra Bhagath Singh, GVP Tan, Ming Jen Šavija, Branko School of Mechanical and Aerospace Engineering Singapore Centre for 3D Printing Engineering::Mechanical engineering 3D Concrete Printing Thixotropy 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. NRF (Natl Research Foundation, S’pore) Published version 2019-08-27T07:27:44Z 2019-12-06T16:01:46Z 2019-08-27T07:27:44Z 2019-12-06T16:01:46Z 2019 Journal Article 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 1996-1944 https://hdl.handle.net/10356/85332 http://hdl.handle.net/10220/49794 10.3390/ma12132149 en Materials © 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/). 12 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Mechanical engineering
3D Concrete Printing
Thixotropy
spellingShingle Engineering::Mechanical engineering
3D Concrete Printing
Thixotropy
Panda, Biranchi
Noor Mohamed, Nisar Ahamed
Paul, Suvash Chandra
Bhagath Singh, GVP
Tan, Ming Jen
Šavija, Branko
The effect of material fresh properties and process parameters on buildability and interlayer adhesion of 3D printed concrete
description 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.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Panda, Biranchi
Noor Mohamed, Nisar Ahamed
Paul, Suvash Chandra
Bhagath Singh, GVP
Tan, Ming Jen
Šavija, Branko
format Article
author Panda, Biranchi
Noor Mohamed, Nisar Ahamed
Paul, Suvash Chandra
Bhagath Singh, GVP
Tan, Ming Jen
Šavija, Branko
author_sort Panda, Biranchi
title The effect of material fresh properties and process parameters on buildability and interlayer adhesion of 3D printed concrete
title_short The effect of material fresh properties and process parameters on buildability and interlayer adhesion of 3D printed concrete
title_full The effect of material fresh properties and process parameters on buildability and interlayer adhesion of 3D printed concrete
title_fullStr The effect of material fresh properties and process parameters on buildability and interlayer adhesion of 3D printed concrete
title_full_unstemmed The effect of material fresh properties and process parameters on buildability and interlayer adhesion of 3D printed concrete
title_sort effect of material fresh properties and process parameters on buildability and interlayer adhesion of 3d printed concrete
publishDate 2019
url https://hdl.handle.net/10356/85332
http://hdl.handle.net/10220/49794
_version_ 1759857033757065216