Researchers test plant-based fibers to improve 3D-printed concrete

Researchers from the University of Virginia School of Engineering and Applied Science have successfully tested a plant-based additive that could significantly enhance 3D-printed concrete.

These plant-based fibers, derived from wood pulp, have shown promise as an additive to enhance the flowability and strength of composite materials. For optimal performance, a concrete mixture for 3D printing has to flow well for smooth fabrication and harden into a stable material with good mechanical strength, interlayer bonding, and low thermal conductivity.

The mixture undergoing testing improves all of those properties, performing exceptionally well under pulling, bending, and compression loads. Researchers discovered that the additive also greatly enhanced the 3D-printed cement’s flowability.

A well-flowed concrete mix helps expel air bubbles, preventing formation of voids that weaken the structure. Microscopic examinations of the hardened samples showed improved bonding and structural integrity.