Overview of Injection Liquid Printing with Dredged-Based Material for Concrete Formwork (2024-08)¶

This research examines the integration of dredged-based materials with injection printing for creating recyclable concrete formwork. It demonstrates how this innovative additive manufacturing (AM) method can significantly enhance reinforced concrete construction by reducing the use of sacrificial materials and formwork. This process employs a mix of dredged material and non-petroleum-based hydrogenated glycerides—a crucial wax formulation component—within a water-based environment. The material's buildability, extrudability, workability, and predictability were evaluated through unconfined compression tests. The research focuses on refining the rheological properties of the materials to ensure their effectiveness in the injection printing process. A specially designed extruder was developed to ensure consistent and predictable material extrusion, critical for the structural integrity of the formwork. This research has produced scaled prototypes to further validate the approach. By merging innovative materials with advanced manufacturing techniques, this study promotes a sustainable construction model, highlighting the intricate relationship between material properties, extrusion design, system control, and temperature management. It opens new avenues for fabrication and constructability in the realm of recyclable concrete formwork, representing a significant advancement in sustainable construction practices.