Effects of Fiber-Volume Fraction, Fiber Length, Water-Binder Ratio, and Nano-Clay Addition on the 3D Printability of Strain-Hardening Cementitious Composites (2023-04)¶

10.1016/j.cemconcomp.2023.105066

Xu Nuoyan, Qian Ye
Journal Article - Cement and Concrete Composites

Abstract

Strain-Hardening Cementitious Composites (SHCC) exhibit superior mechanical performance and show potential in 3D printing applications. However, the formation of fiber agglomerates causes significant challenges during pumping and 3D printing. This study explores the 3D printability of SHCC, using a progressive cavity pump. Various situations are found: Some SHCC mixtures could be 3D printed smoothly with a continuous and nonfractured filament; Some show fractured filaments; Some cause the pump automatically stopped. For these failed extrusion cases, fiber agglomerates are found in the nozzle resulting in fractured filaments, or in the pump screw resulting in automatic cessation of the pump. Effects of fiber volume fraction, fiber length, water-binder ratio, and nanoclay addition on the 3D printability of SHCC are explored. Analysis based on the contact percolation packing fraction of flexible fibers is performed to explore the formation of fiber agglomerates and its impact on 3D printability. The significance of fiber deflection is also highlighted.

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28 References

41 Citations

BibTeX

@article{xu_qian.2023.EoFVFFLWBRaNCAot3PoSHCC,
  author            = "Nuoyan Xu and Ye Qian",
  title             = "Effects of Fiber-Volume Fraction, Fiber Length, Water-Binder Ratio, and Nano-Clay Addition on the 3D Printability of Strain-Hardening Cementitious Composites",
  doi               = "10.1016/j.cemconcomp.2023.105066",
  year              = "2023",
  journal           = "Cement and Concrete Composites",
}

Formatted Citation

IEEE

N. Xu and Y. Qian, “Effects of Fiber-Volume Fraction, Fiber Length, Water-Binder Ratio, and Nano-Clay Addition on the 3D Printability of Strain-Hardening Cementitious Composites”, Cement and Concrete Composites, 2023, doi: 10.1016/j.cemconcomp.2023.105066.

CMOS

Xu, Nuoyan, and Ye Qian. “Effects of Fiber-Volume Fraction, Fiber Length, Water-Binder Ratio, and Nano-Clay Addition on the 3D Printability of Strain-Hardening Cementitious Composites”. Cement and Concrete Composites, 2023. https://doi.org/10.1016/j.cemconcomp.2023.105066.