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3D-printed concrete with in-process embedded fiber-reinforced polymer grid reinforcement
Hou-Qi Sun1, Shan-Shan Xie1, Jun-Jie Zeng2
1School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, China.
Communications Engineering
|March 5, 2026
Summary
This study introduces a new method for 3D printing concrete with integrated flexible fiber-reinforced polymer grids. This reinforcement significantly enhances structural performance, showing promise for advanced construction applications.
Area of Science:
- Materials Science
- Civil Engineering
- Additive Manufacturing
Background:
- Effective reinforcement is crucial for the widespread adoption of 3D-printed concrete.
- Current methods lack integrated reinforcement solutions, limiting structural integrity and applications.
Purpose of the Study:
- To develop and evaluate an in-process embedding technology for simultaneous 3D printing of concrete and fiber-reinforced polymer (FRP) grids.
- To assess the performance enhancement of 3D-printed concrete using FRP grid reinforcement.
Main Methods:
- Developed an innovative in-process embedding technology for concurrent printing of concrete and FRP grids.
- Conducted pull-out and splitting tensile tests to evaluate concrete-grid bonding.
- Performed three-point bending tests on reinforced 3D-printed concrete plates.
Main Results:
- Reinforced concrete plates showed a 41% increase in load-bearing capacity and a 552% improvement in deflection.
- Simultaneous printing introduced voids, slightly weakening inter-layer bonding between concrete sections.
- The FRP grids effectively enhanced the flexural performance of the 3D-printed concrete.
Conclusions:
- The proposed in-process embedding technology is feasible for integrating FRP reinforcement into 3D-printed concrete.
- This method has the potential to significantly advance the structural capabilities of 3D-printed concrete components.
- Further research may focus on optimizing the printing process to mitigate void formation and enhance interfacial bonding.
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