Improving Structural Build-Up of Limestone-Calcined-Clay-Cement-Pastes by Using Inorganic Additives (2023-06)¶

10.1016/j.conbuildmat.2023.131959

Chen Yu, Zhang Yu, He Shan, Liang Xuhui, Schlangen Erik, Çopuroğlu Oğuzhan
Journal Article - Construction and Building Materials, Vol. 392

Abstract

In 3D concrete printing, fast structuration is a prerequisite for ideal buildability. This paper aims to study the impact of inorganic additives, i.e., CaCl2 and gypsum, on structural build-up and very early-age hydration of limestone-calcined clay-cement (LC3) pastes within the first 70–80 min. Results show that, increasing the dosage of CaCl2 or gypsum can accelerate storage modulus G’ and static yield stress evolution with time, as well as increase chemically bound water (H) content and total specific surface area (SSAtotal). Furthermore, good correlations were found between G’ and H content, as well as static yield stress and the ratio of free water content to SSAtotal. The acceleration by CaCl2 can be attributed to stimulating C3S and C3A hydration and promoting crystal formation, i.e., ettringite, portlandite, and Friedel’s salt. Additionally, the increase in gypsum percentage led to a large amount of unreacted gypsum in the system, resulting in an increase in SSAtotal.

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29 References

9 Citations

BibTeX

@article{chen_zhan_he_lian.2023.ISBUoLCCCPbUIA,
  author            = "Yu Chen and Yu Zhang and Shan He and Xuhui Liang and Erik Schlangen and Oğuzhan Çopuroğlu",
  title             = "Improving Structural Build-Up of Limestone-Calcined-Clay-Cement-Pastes by Using Inorganic Additives",
  doi               = "10.1016/j.conbuildmat.2023.131959",
  year              = "2023",
  journal           = "Construction and Building Materials",
  volume            = "392",
}

Formatted Citation

IEEE

Y. Chen, Y. Zhang, S. He, X. Liang, E. Schlangen and O. Çopuroğlu, “Improving Structural Build-Up of Limestone-Calcined-Clay-Cement-Pastes by Using Inorganic Additives”, Construction and Building Materials, vol. 392, 2023, doi: 10.1016/j.conbuildmat.2023.131959.

CMOS

Chen, Yu, Yu Zhang, Shan He, Xuhui Liang, Erik Schlangen, and Oğuzhan Çopuroğlu. “Improving Structural Build-Up of Limestone-Calcined-Clay-Cement-Pastes by Using Inorganic Additives”. Construction and Building Materials 392 (2023). https://doi.org/10.1016/j.conbuildmat.2023.131959.