This special issue aims to enhance sustainability in 3D concrete printing (3DCP) by presenting original research that investigates innovative materials and methods for both structural and non-structural applications. A primary focus is on integrating sustainability principles by utilizing waste-derived and recycled materials as partial replacements for natural aggregates, along with innovative binders and low-carbon alternatives. We particularly encourage studies that examine how these materials influence fresh and hardened properties, printability, interlayer bonding, and structural integrity. 

Submissions that adopt a life cycle perspective are also highly welcomed, including life cycle assessments (LCA), embodied carbon analysis, energy consumption, resource efficiency, and end-of-life considerations for 3DCP systems. Research comparing 3DCP with conventional construction methods regarding environmental impact, cost efficiency, and scalability will offer valuable insights into its sustainability potential in real-world applications.

Overall, this special issue seeks to foster a comprehensive understanding of how 3DCP can contribute to a more resource-efficient, low-carbon, and resilient built environment through advancements in materials, design, and construction processes.