How 3D Concrete Materials Are Redefining the Future of Infrastructure?

Compared with conventional building technology, 3D printing technology has differences in material, structural design, and construction process. Concrete materials should meet all the operational requirements of the 3D printer, including extrudability, buildability, and interlayer bonding, to satisfy the requirements of the printing process. In detail, extrudability allows the material to pass smoothly through the 3D printer nozzle; buildability allows each printed layer to support the subsequent layers; and interlayer bonding provides adequate adhesion between successive layers.

As a result, the mix design of 3D-printed cement materials differs from that of conventional cement-based materials. The mix design must contain a higher cement content, smaller aggregate particle sizes, viscosity-modifying agents, setting accelerators, and fibers to enhance the mechanical performance of 3D-printed cement. Therefore, the microstructure and mechanical properties of 3D concrete materials are different and remain inferior to those of conventional concrete materials.

To utilize more advanced construction technology and achieve the future of automated construction, reshaping concrete materials is equivalent to reshaping the future of the entire construction industry. Although current 3D concrete materials have not yet reached high construction standards, the future of automated construction and the advantages it offers in construction convenience and geometric freedom make the advancement of this research an inevitable endeavor.

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