Pore-Structure, Internal Relative Humidity, and Fiber-Orientation of 3D Printed Concrete with Polypropylene-Fiber and Their Relation with Shrinkage (2022-09)¶

10.1016/j.jobe.2022.105250

Ma Lei, Zhang Qing, Lombois-Burger Hélène, Jia Zijian, Zhang Zedi, Niu Geng, Zhang Yamei
Journal Article - Journal of Building Engineering, Vol. 61

Abstract

The shrinkage properties and its mitigation strategies for 3D printed concrete (3DPC) are of great significance, especially for structural applications in construction. This study aims to understand the effect of polypropylene fiber (PP fiber) on the total shrinkage of 3DPC under drying. The rheological properties, mechanical properties, internal relative humidity (RH), pore size distribution and fiber orientation of 3DPC were investigated and compared with cast concrete. Without PP fiber, the total shrinkage of the printed specimens is similar to the cast ones. The addition of PP fiber reduces the total shrinkage for cast specimens more significantly than for printed specimens. This phenomenon is explained from both pore structure and fiber orientation perspectives. A lower total shrinkage is also observed on specimens cut along the printing direction when compared with those cut perpendicularly to the printing direction due to higher quantity of fiber oriented along the printing direction. The total shrinkage of 3DPC is found inversely proportional to the fiber orientation factor.

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45 References

58 Citations

BibTeX

@article{ma_zhan_lomb_jia.2022.PSIRHaFOo3PCwPFaTRwS,
  author            = "Lei Ma and Qing Zhang and Hélène Lombois-Burger and Zijian Jia and Zedi Zhang and Geng Niu and Yamei Zhang",
  title             = "Pore-Structure, Internal Relative Humidity, and Fiber-Orientation of 3D Printed Concrete with Polypropylene-Fiber and Their Relation with Shrinkage",
  doi               = "10.1016/j.jobe.2022.105250",
  year              = "2022",
  journal           = "Journal of Building Engineering",
  volume            = "61",
}

Formatted Citation

IEEE

L. Ma, “Pore-Structure, Internal Relative Humidity, and Fiber-Orientation of 3D Printed Concrete with Polypropylene-Fiber and Their Relation with Shrinkage”, Journal of Building Engineering, vol. 61, 2022, doi: 10.1016/j.jobe.2022.105250.

CMOS

Ma, Lei, Qing Zhang, Hélène Lombois-Burger, Zijian Jia, Zedi Zhang, Geng Niu, and Yamei Zhang. “Pore-Structure, Internal Relative Humidity, and Fiber-Orientation of 3D Printed Concrete with Polypropylene-Fiber and Their Relation with Shrinkage”. Journal of Building Engineering 61 (2022). https://doi.org/10.1016/j.jobe.2022.105250.