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In-Situ Crosslinked Nano-SiO2 Reinforced Alginate Bio-Textile for Mitigating Plastic Shrinkage in 3D Printed Concrete (2025-03)

10.1016/j.addma.2025.104753

Xia Kailun,  Chen Yuning, Zhang Zedi, Wang Wei,  Chen Yu, Jia Lutao,  Jia Zijian, Quan Shitao,  Zhang Yamei
Journal Article - Additive Manufacturing, No. 104753

Abstract

Absence of formwork leaves 3D printed concrete (3DPC) with rapid water loss and plastic shrinkage. For water preservation, a strategy based on in-situ generated bio-textile film on 3DPC surface is proposed herein. The conception was achieved by adopting nano SiO2 (NS) reinforced sodium alginate (NSSA) onto 3DPC surface. Triggered by calcium ions on 3DPC surface, in-situ crosslinking of NSSA can generate a water preservation film, where NS serves as reinforcer for film densification. Moreover, through pozzolanic reaction, NS can induce further crosslinking between C-S-H and alginate biopolymer matrix, forming a bio-textile film with enhanced water vapor impermeability, mechanical property and surface adhesion on 3DPC. Within 3 hours and 24 hours after concrete printing, this strategy significantly reduced 3DPC plastic shrinkage by 74% and 59%, and preserved water in 3DPC from evaporation by 72.8% and 75.4%. This study provides a promising new approach for mitigating plastic shrinkage of 3DPC.

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BibTeX 
@article{xia_chen_zhan_wang.2025.ISCNSRABTfMPSi3PC,
  author            = "Kailun Xia and Yuning Chen and Zedi Zhang and Wei Wang and Yu Chen and Lutao Jia and Zijian Jia and Shitao Quan and Yamei Zhang",
  title             = "In-Situ Crosslinked Nano-SiO2 Reinforced Alginate Bio-Textile for Mitigating Plastic Shrinkage in 3D Printed Concrete",
  doi               = "10.1016/j.addma.2025.104753",
  year              = "2025",
  journal           = "Additive Manufacturing",
  pages             = "104753",
}
Formatted Citation

K. Xia, “In-Situ Crosslinked Nano-SiO2 Reinforced Alginate Bio-Textile for Mitigating Plastic Shrinkage in 3D Printed Concrete”, Additive Manufacturing, p. 104753, 2025, doi: 10.1016/j.addma.2025.104753.

Xia, Kailun, Yuning Chen, Zedi Zhang, Wei Wang, Yu Chen, Lutao Jia, Zijian Jia, Shitao Quan, and Yamei Zhang. “In-Situ Crosslinked Nano-SiO2 Reinforced Alginate Bio-Textile for Mitigating Plastic Shrinkage in 3D Printed Concrete”. Additive Manufacturing, 2025, 104753. https://doi.org/10.1016/j.addma.2025.104753.