Hardened Properties of 3D Printed Concrete with Recycled Coarse Aggregate (2022-06)¶

10.1016/j.cemconres.2022.106868

Liu Huawei, Liu Chao, Wu Yiwen, Bai Guoliang, He Chunhui, Zhang Rongfei, Wang Youqiang
Journal Article - Cement and Concrete Research, Vol. 159

Abstract

In this paper, a novel extrusion-based 3D printed material was obtained by preparing 3D printed recycled coarse aggregate concrete (3DPRAC) using recycled coarse aggregate (RCA), and the compressive and flexural properties were investigated at different RCA replacement ratios, ages, and construction forms. The porosity, pore volume distribution, pore geometry characteristics were analyzed by X-CT. MIP and SEM were used to analyze the pore structure of the RCA. The results showed that the compressive and flexural strengths have obvious anisotropic characteristics. With increasing replacement ratio, the compressive and flexural strengths generally decreased. Internal pores of 3DPRAC were found to exhibit the geometric characteristics of flat ellipsoidal and uniaxially oriented arrangements along the printing direction. A multiple partition-interface model was proposed to establish the connection between pore structure characteristics and force cracking, and the anisotropic mechanical property mechanism of 3DPRAC was revealed.

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47 References

99 Citations

BibTeX

@article{liu_liu_wu_bai.2022.HPo3PCwRCA,
  author            = "Huawei Liu and Chao Liu and Yiwen Wu and Guoliang Bai and Chunhui He and Rongfei Zhang and Youqiang Wang",
  title             = "Hardened Properties of 3D Printed Concrete with Recycled Coarse Aggregate",
  doi               = "10.1016/j.cemconres.2022.106868",
  year              = "2022",
  journal           = "Cement and Concrete Research",
  volume            = "159",
}

Formatted Citation

IEEE

H. Liu, “Hardened Properties of 3D Printed Concrete with Recycled Coarse Aggregate”, Cement and Concrete Research, vol. 159, 2022, doi: 10.1016/j.cemconres.2022.106868.

CMOS

Liu, Huawei, Chao Liu, Yiwen Wu, Guoliang Bai, Chunhui He, Rongfei Zhang, and Youqiang Wang. “Hardened Properties of 3D Printed Concrete with Recycled Coarse Aggregate”. Cement and Concrete Research 159 (2022). https://doi.org/10.1016/j.cemconres.2022.106868.