Rheology of 3D Printable Concrete Prepared by Secondary Mixing of Ready-Mix Concrete (2023-01)¶

10.1016/j.cemconcomp.2023.104958

Xiao Jianzhuang, Hou Shaodan, Duan Zhenhua, Zou Shuai
Journal Article - Cement and Concrete Composites

Abstract

The requirements for pumpability, extrudability, and buildability of 3D printable concrete are very high, and it is hard for ready-mix concrete to meet these requirements. In this study, a novel method, namely secondary mixing was performed to adjust the ready-mix concrete with high fluidity to a printable state by adding an appropriate amount of viscosity modifying agent before printing. The effects of hydroxy propyl methyl cellulose (HPMC) and standing time on the rheology evolution of 3D printable ready-mix concrete (3DPRC) before/after secondary mixing were comparatively investigated. In addition, recycled coarse aggregates (RCA) with a maximum size of 10 mm were applied to prepare 3DPRC. The results showed that adding HPMC during secondary mixing on-site facilitated the buildability of 3DPRC by increasing its static yield stress. The standing time exhibited a great effect on the improvement of dynamic yield stress. Meanwhile, the RCA increased the dynamic yield stress during the standing period and the plastic viscosity during secondary mixing. These effects can contribute to the printability of ready-mix concrete.

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22 References

54 Citations

BibTeX

@article{xiao_hou_duan_zou.2023.Ro3PCPbSMoRMC,
  author            = "Jianzhuang Xiao and Shaodan Hou and Zhenhua Duan and Shuai Zou",
  title             = "Rheology of 3D Printable Concrete Prepared by Secondary Mixing of Ready-Mix Concrete",
  doi               = "10.1016/j.cemconcomp.2023.104958",
  year              = "2023",
  journal           = "Cement and Concrete Composites",
}

Formatted Citation

IEEE

J. Xiao, S. Hou, Z. Duan and S. Zou, “Rheology of 3D Printable Concrete Prepared by Secondary Mixing of Ready-Mix Concrete”, Cement and Concrete Composites, 2023, doi: 10.1016/j.cemconcomp.2023.104958.

CMOS

Xiao, Jianzhuang, Shaodan Hou, Zhenhua Duan, and Shuai Zou. “Rheology of 3D Printable Concrete Prepared by Secondary Mixing of Ready-Mix Concrete”. Cement and Concrete Composites, 2023. https://doi.org/10.1016/j.cemconcomp.2023.104958.