Influence of Pore-Defects on the Hardened Properties of 3D Printed Concrete with Coarse Aggregate (2022-04)¶

10.1016/j.addma.2022.102843

Liu Huawei, Liu Chao, Bai Guoliang, Wu Yiwen, He Chunhui, Zhang Rongfei, Wang Youqiang
Journal Article - Additive Manufacturing, Vol. 55

Abstract

In this study, 3D printed concrete was prepared with a natural coarse aggregate to investigate the mechanical properties of 3D printed natural coarse aggregate concrete (3DPNAC) after hardening, considering curing time and anisotropic mechanical strength, and the properties of 3DPNAC were compared to those of a 3D printed mortar (3DPM). The compressive and flexural strengths were measured by an electronic universal testing machine. The bond strength and damage pattern of the interlayer interface were investigated using a self-designed loading device and digital image correlation technique, and pore defects inside the printed structure were characterized using X-ray computed tomography. The results showed that the compressive and flexural strengths of 3DPNAC showed varying degrees of anisotropic characteristics and differential development patterns of mechanical strength with curing time. The filament interfacial bonding system was proposed, and the bond strength of 3DPNAC was more than twice that of 3DPM. The geometry of pore defects in 3DPNAC evolved with pore volume variations. Finally, the evolution of pore defect formation was analyzed, and the effect mechanisms of pore defects on 3DPNAC mechanical properties were revealed.

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39 References

76 Citations

BibTeX

@article{liu_liu_bai_wu.2022.IoPDotHPo3PCwCA,
  author            = "Huawei Liu and Chao Liu and Guoliang Bai and Yiwen Wu and Chunhui He and Rongfei Zhang and Youqiang Wang",
  title             = "Influence of Pore-Defects on the Hardened Properties of 3D Printed Concrete with Coarse Aggregate",
  doi               = "10.1016/j.addma.2022.102843",
  year              = "2022",
  journal           = "Additive Manufacturing",
  volume            = "55",
}

Formatted Citation

IEEE

H. Liu, “Influence of Pore-Defects on the Hardened Properties of 3D Printed Concrete with Coarse Aggregate”, Additive Manufacturing, vol. 55, 2022, doi: 10.1016/j.addma.2022.102843.

CMOS

Liu, Huawei, Chao Liu, Guoliang Bai, Yiwen Wu, Chunhui He, Rongfei Zhang, and Youqiang Wang. “Influence of Pore-Defects on the Hardened Properties of 3D Printed Concrete with Coarse Aggregate”. Additive Manufacturing 55 (2022). https://doi.org/10.1016/j.addma.2022.102843.