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Title: Feasibility study on sustainable magnesium potassium phosphate cement paste for 3D printing
Authors: Weng, Yiwei
Ruan, Shaoqin
Li, Mingyang
Mo, Liwu
Unluer, Cise
Tan, Ming Jen
Qian, Shunzhi
Keywords: Engineering::Mechanical engineering
Issue Date: 2019
Source: Weng, Y., Ruan, S., Li, M., Mo, L., Unluer, C., Tan, M. J., & Qian, S. (2019). Feasibility study on sustainable magnesium potassium phosphate cement paste for 3D printing. Construction and Building Materials, 221, 595-603. doi:10.1016/j.conbuildmat.2019.05.053
Journal: Construction and Building Materials
Abstract: 3D printing of cementitious materials is an innovative and promising approach in the construction sector, attracting much attention over the past few years. Use of waste cementitious materials in the production of 3D printable components increases the sustainability and cost-effectiveness of this process. This work proposes an environmentally friendly 3D printable cementitious material involving the use of magnesium potassium phosphate cement (MKPC) with various ratios of fly ash replacement ranging from 0 to 60 wt% to increase the working time of the binder. Silica fume was used at up to 10 wt% to adjust rheological and mechanical properties. The performance of the developed MKPC binders with different formulations in the context of 3D printing was assessed via a detailed investigation of the workability, extrudability, buildability, compressive strength, porosity and microstructural analysis. Amongst the mixtures studied, the optimum MKPC formulation involving 60 wt% fly ash and 10 wt% silica fume with a borax-to-magnesia ratio of 1:4 was selected for a small-scale printing demonstration in line with its rheological and mechanical properties. Finally, a 20-layer component with a height of 180 mm was printed in 5 min to demonstrate the feasibility of the adopted mixture in 3D printing.
ISSN: 0950-0618
DOI: 10.1016/j.conbuildmat.2019.05.053
Rights: © 2019 Elsevier Ltd. All rights reserved. This paper was published in Construction and Building Materials and is made available with permission of Elsevier Ltd.
Fulltext Permission: embargo_20211231
Fulltext Availability: With Fulltext
Appears in Collections:SC3DP Journal Articles

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