Leveraging Internal Curing Effect of Fly-Ash-Cenosphere for Alleviating Autogenous Shrinkage in 3D Printing (2022-07)¶

10.1016/j.conbuildmat.2022.128247

Tao Jie-Lin, Lin Can, Luo Qiling, Long Wujian, Zheng Shuyi, Hong Chen-Yu
Journal Article - Construction and Building Materials, Vol. 346, No. 128247

Abstract

The development of three-dimensional (3D) printing technology in the construction industry has coincided with growing attention on the investigation of printable cement-based composite. Meanwhile, the exploitation of high-performance and environmentally friendly printable cement-based composite is an inevitable path for the sustainable development of 3D printing in the construction industry. This study proposes the use of perforated fly ash cenospheres (PFACs) as internal curing (IC) agent into limestone calcined clay cement (LC3) mortar to develop a novel green printable cement-based composite. Rheological behavior of LC3 mortar containing PFACs has been shown to meet the requirements of 3D printing. The internal curing effect on autogenous shrinkage of mortar was studied by employing Fiber Bragg Grating (FBG) technology. Compressive and flexural strengths of LC3 mortar containing PFACs were evaluated. Additionally, microstructural investigation was analyzed through SEM, and the hydration products were studied by XRD and TG tests. Results suggest that shrinkage strain of LC3 mortar containing 15% PFAC was approximately 80% lower than that of mortar without PFAC, which indicates that PFAC in LC3 mortar can be effective in holding the mixing water for IC that can reduce the autogenous shrinkage. Furthermore, additional mechanical strength of mortar containing PFAC was generated through IC effect and the pozzolanic activity of PFAC, which can effectively compensate the strength loss caused by the PFAC. However, microstructural investigation indicated that the pozzolanic activity of PFAC has limited effect on cement hydration compared with the introduction of additional IC water. Consequently, this study reveals that it is effective to adopt PFAC as IC agent into LC3 mortar to develop high-performance and sustainable printable cement-based composite.

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10 References

16 Citations

BibTeX

@article{tao_lin_luo_long.2022.LICEoFACfAASi3P,
  author            = "Jie-Lin Tao and Can Lin and Qiling Luo and Wujian Long and Shuyi Zheng and Chen-Yu Hong",
  title             = "Leveraging Internal Curing Effect of Fly-Ash-Cenosphere for Alleviating Autogenous Shrinkage in 3D Printing",
  doi               = "10.1016/j.conbuildmat.2022.128247",
  year              = "2022",
  journal           = "Construction and Building Materials",
  volume            = "346",
  pages             = "128247",
}

Formatted Citation

IEEE

J.-L. Tao, C. Lin, Q. Luo, W. Long, S. Zheng and C.-Y. Hong, “Leveraging Internal Curing Effect of Fly-Ash-Cenosphere for Alleviating Autogenous Shrinkage in 3D Printing”, Construction and Building Materials, vol. 346, p. 128247, 2022, doi: 10.1016/j.conbuildmat.2022.128247.

CMOS

Tao, Jie-Lin, Can Lin, Qiling Luo, Wujian Long, Shuyi Zheng, and Chen-Yu Hong. “Leveraging Internal Curing Effect of Fly-Ash-Cenosphere for Alleviating Autogenous Shrinkage in 3D Printing”. Construction and Building Materials 346 (2022): 128247. https://doi.org/10.1016/j.conbuildmat.2022.128247.