Pattern and filament optimization for 3D-printed reinforcements to enhance the flexural behavior of cement-based composites

Abstract

Cement-based materials are the most widely utilized construction materials in the world owing to their high compressive strength, however, need reinforcement to withstand direct or indirect tensile forces. In this study, the potential use of 3D-printed polymers as an alternative reinforcement in cement-based composites was evaluated. Polyethylene terephthalate glycol (PETG), Polyamide (PA), and Acrylonitrile butadiene styrene (ABS) based triangular and honeycomb-patterned 3D-printed reinforcements were incorporated into cement-based composites and their mechanical performances were compared under three-point flexural tests by considering both polymer and pattern type. Both triangular and honeycomb patterns were enhanced the flexural behavior. By considering all filaments, the honeycomb pattern was found more effective than the triangular pattern for increasing flexural strength, deflection capacity, and toughness up to 46.80%, 251.85%, and 77.66%, respectively. In the case of filament type, 3D-printed PA-type filament in a honeycomb pattern remained flexural strength, enhanced deflection capacity, and increased flexural toughness with pseudo-deflection hardening behavior. 3D-printed honeycomb patterned reinforcements produced by PA has the opportunity to be used in the manufacture of cement-based composites.