Pore Structure Analysis of Printcrete Under Varying Temperature (2025-06)¶

Printable concrete (hereafter printcrete) has the potential to revolutionize the construction sector, enabling applications in environments where human involvement is limited, such as high geothermal tunnel linings. The pore structure of concrete plays a crucial role in determining its mechanical properties and long-term performance. While studies have explored the porosity of printcrete, the impact of varying temperature conditions on its pore structure remains insufficiently investigated. To this end, this study utilized X-ray computed tomography (XCT) to perform a detailed pore structure analysis of printcrete under different temperatures. The findings reveal that elevated curing temperatures lead to an increase in the overall porosity of printcrete and the size of air voids. However, temperature has a minimal impact on the sphericity of air voids, which is primarily influenced by the extrusion process.