Development of Aggregate-bed 3D Concrete Printing for Construction

Particle-bed 3D Concrete Printing (3DCP) is one of the commonly adopted 3DCP techniques, which is based on spraying or deposition of water-based ‘ink’ into particle bed to selectively bind the granular material. This research developed a viable particle-bed 3DCP scheme, using locally available coarse aggregate as the particle bed to expand the adoption of 3DCP in construction. The utilization of coarse aggregates reduces the material costs and carbon footprint, making the particle-bed 3DCP more suitable for the construction industry. In this research, different characterizing techniques, materials composition design, and factors influencing the quality of printed products were systematically investigated.