| Abstract Scope |
Understanding how process parameters influence the strength and durability of concrete-printed infrastructure is integral for commercial advancement. Minimal research has examined process quality methodologies beyond mortar mix design. This study focuses on large-scale 3DCP using coarse aggregate, reducing costly and carbon-intensive cement while maintaining structural performance. Including large aggregates increases sensitivity to process timing, extrusion conditions, and particle segregation, promoting void formation and weak interlayer interfaces if parameters are not properly selected. This research assesses multilayer samples produced under controlled parameter specifications (nozzle height, nozzle velocity, extrusion rate, layer time, and stiffener flow rate) to determine bond strength and durability, via interlayer tensile and shear strength tests and pore geometry, respectively. Analysis of durability will elucidate the mechanical properties of filament bonds and guide future mitigation. Findings indicate extrusion rate and layer time strongly affect strength and porosity, providing insight into parameter-driven defect formation for reliable and repeatable large-scale 3DCP. |