Journal of Inorganic Materials, Volume. 37, Issue 3, 338(2022)

Direct Ink Writing of Gypsum: Developing a Printable Gypsum Paste

Hongli ZHOU1... Zhiyong CAI1, Xiaofeng WANG1,*, Jin ZENG2, Yan FENG1, Chaoqun PENG1 and Richu WANG1 |Show fewer author(s)
Author Affiliations
  • 11. School of Materials Science and Engineering, Central South University, Changsha 410083, China
  • 22. School of Metallurgy and Environment, Central South University, Changsha 410083, China
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    Figures & Tables(6)
    Effect of retarders on gypsum paste(a) Setting time vs content of retarder; (b) Fluidity vs content of citric acid (CA) in the gypsum paste; (c) Shear elastic modulus vs shear stress; (d) Yield stress vs content of CA
    Effect of thickener on gypsum paste(a) Setting time vs content of thickeners; (b) Fluidity vs content of thickener; (c) Shear modulus of elasticity of HPMC with different dosage; (d) Yield stress vs content of HPMC
    Structures and microstructures of printed 3D gypsum(a, d) Scaffold structure with three horizontal lines and three vertical lines appearing alternately and periodically in the Z-axis, the cross angle is 60°; (b, e) Spider structure consisting of alternate layers of radial and circular rods; (c, f) Scaffold structure with three horizontal lines and three vertical lines appearing alternately and periodically in the Z-axis, the cross angle is 45°; (g-i) Microstructure of printed gypsum parts
    Compressive strength of different gypsum samples3 Discussion
    XRD patterns at different hydration time for gypsum pastes with different agents(a) 0.6% (in mass) citric acid gypsum at different hydration time; (b) 0.6% (in mass) citric acid and 0.3% (in mass) HPMC at different hydration time
    SEM images of gypsum at different hydration time(a-d) Gypsum with 0.6% (in mass) CA at different hydration time ((a) 5 min, (b) 12 min, (c) 20 min, (d) 300 min (final setting time)); (e-f) Gypsum with 0.6% (in mass) CA and 0.3% (in mass) HPMC at different hydration time ((e) 5 min, (f) 12 min, (g) 20 min, (h) 320 min (final setting time))
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    Hongli ZHOU, Zhiyong CAI, Xiaofeng WANG, Jin ZENG, Yan FENG, Chaoqun PENG, Richu WANG. Direct Ink Writing of Gypsum: Developing a Printable Gypsum Paste[J]. Journal of Inorganic Materials, 2022, 37(3): 338

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    Paper Information

    Category:

    Received: Oct. 2, 2021

    Accepted: --

    Published Online: Nov. 16, 2022

    The Author Email: WANG Xiaofeng (wangxiaofeng@csu.edu.cn)

    DOI:10.15541/jim20210606

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