Optimization of 3D-printed reinforced concrete beams with four types of reinforced patterns and different distances

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The enhancement of mechanical properties in reinforced concrete beams remains a pivotal focus in modern structural engineering. In the pursuit of innovative solutions, recent studies have explored the potential of 3D-printing technology to reinforce cementitious materials. However, challenges persist in optimizing this approach. This study investigates the reinforcement of cement beams using four distinct 3D-printed patterns: Honeycomb, 3D-Honeycomb, Grid, and Triangle. Each pattern was strategically positioned at varying distances from the neutral axis to assess its impact on the beam’s flexural strength. The findings reveal that the Honeycomb pattern, when placed 10 mm from the bottom of the beam, enhanced flexural strength by over 25 %. The 3D-Honeycomb pattern, positioned at 5 mm, demonstrated similar improvements. Notably, the Grid pattern, also placed 5 mm from the bottom, resulted in a remarkable 46 % increase in flexural strength, while the Triangle pattern contributed to a 30 % enhancement. Further optimization was achieved by combining two reinforcement patterns. The Honeycomb pattern exhibited strain-hardening behavior and increased flexural strength by over 76 %. The 3D-Honeycomb and Grid patterns further augmented flexural strength by 76 % and 72 %, respectively. The most significant improvement was observed with the Grid pattern, which boosted flexural strength by more than 118 %. This study underscored the transformative potential of 3D-printed reinforcement in cement beams. The strategic use of Honeycomb, 3D-Honeycomb, Grid, and Triangle patterns not only enhances flexural strength but also induces strain-hardening behavior, leading to strength gains between 76 % and 118 % compared to the control sample. These findings offer valuable insights for the development of advanced construction materials and techniques.