Relationship Between Interfacial Pore Structure and Anisotropic Dynamic Splitting Behaviour of 3D Printed Engineered Cementitious Composites (2025-05)¶

10.1016/j.conbuildmat.2025.141931

Chen Meng, Sun Hao, Wang Yuting, Zhang Tong
Journal Article - Construction and Building Materials, Vol. 486, No. 141931

Abstract

The use of engineered cementitious composite (ECC) in 3D printing provides an effective way to realize intelligent construction, which promises to remove the dependence on steel bars due to their high ductility characteristics. However, the interfaces and anisotropy brought by 3D printing on the mechanical properties of concrete have rarely been studied regarding the dynamic properties. Hence, a series of tests including elastic modulus, uniaxial tensile, quasi-static, dynamic tensile and microscopic CT analysis are conducted to investigate the relationship between microstructure and anisotropy on the dynamic properties of 3D-printed ECC (3DP-ECC). The results show that the dynamic split tensile strength of the specimens in X/Y/Z tensile directions is significantly anisotropic in the strain rate range of 2.6–7.4 s−1, with the specimens in the X-tensile direction being 5.9 %–14.1 % and 14.4 %–35.0 % higher than that in Y- and Z-directions. A mechanical model based on Mohr circles is proposed to elucidate the changing rules of the failure modes of the specimens in different printing directions. Additionally, the trend of the dynamic splitting increase factor of 3DP-ECC in the range of 10−4–101 s−1 is well predicted by the improved bilinear model. The R2 value higher than 0.96 verified a good correlation between the interfacial pore structure and the anisotropic dynamic splitting behaviour.

¶

39 References

2 Citations

BibTeX

@article{chen_sun_wang_zhan.2025.RBIPSaADSBo3PECC,
  author            = "Meng Chen and Hao Sun and Yuting Wang and Tong Zhang",
  title             = "Relationship Between Interfacial Pore Structure and Anisotropic Dynamic Splitting Behaviour of 3D Printed Engineered Cementitious Composites",
  doi               = "10.1016/j.conbuildmat.2025.141931",
  year              = "2025",
  journal           = "Construction and Building Materials",
  volume            = "486",
  pages             = "141931",
}

Formatted Citation

IEEE

M. Chen, H. Sun, Y. Wang and T. Zhang, “Relationship Between Interfacial Pore Structure and Anisotropic Dynamic Splitting Behaviour of 3D Printed Engineered Cementitious Composites”, Construction and Building Materials, vol. 486, p. 141931, 2025, doi: 10.1016/j.conbuildmat.2025.141931.

CMOS

Chen, Meng, Hao Sun, Yuting Wang, and Tong Zhang. “Relationship Between Interfacial Pore Structure and Anisotropic Dynamic Splitting Behaviour of 3D Printed Engineered Cementitious Composites”. Construction and Building Materials 486 (2025): 141931. https://doi.org/10.1016/j.conbuildmat.2025.141931.