Reinforce 3D-Printed Cementitious Structures with CFRP
In recent years, 3D printing technology has been adopted in the field of construction. The current technology typically uses cementitious material, however, the components produced by this technology exhibit orthotropic behavior; thus, their tensile and interlayer bond strength is low which causes concern for safety. Therefore, reinforcements that can be easily applied to 3D-printed structures are required.
Externally bonded carbon fiber reinforced polymer (CFRP) has been widely applied to improve the load-bearing capacity and ductility of concrete and metallic structures due to its high strength, low weight, resistance to corrosion and easy application.
Studies have shown that wrapping 3D-printed cementitious columns with CFRP increased the peak load that they could endure by 1427–1792% and increased the largest deformation they could achieve by 833–1171%. For the 3D-printed cementitious beams reinforce with CFRP, their load-bearing capacity was increased by 179–604% and the flexural deflection at their mid-spans was increased by 40–225%.