Evaluation on Pore Structure and Chloride Ion Diffusivity at Layered Interfaces of 3d Printing Concrete in Seawater

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This research aims to understand the influence of pore structure on chloride ion diffusivity in 3D printed concrete within a seawater environment.
Constructed layered structures in a seawater environment using 3D printing.
Evaluated the pore structure of layered interfaces using X-ray CT and mercury intrusion porosimetry (MIP).
Conducted elemental mapping with electron probe microanalysis (EPMA) and identified hydration products through X-ray diffraction (XRD).
High porosity was observed at the layered interfaces of 3D printed concrete.
Chloride ion diffusivity was significantly influenced by the pore structure characteristics.
Crystallization was linked to changes in pore structure and chloride ion transport.

Evaluation reveals the impact of pore structure on chloride ion diffusivity in 3D printed concrete, indicating durability concerns.

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LOU et al. (2026) studied this question.

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