Abstract
In this study, 3D printed concrete was prepared with a natural coarse aggregate to investigate the mechanical properties of 3D printed natural coarse aggregate concrete (3DPNAC) after hardening, considering curing time and anisotropic mechanical strength, and the properties of 3DPNAC were compared to those of a 3D printed mortar (3DPM). The compressive and flexural strengths were measured by an electronic universal testing machine. The bond strength and damage pattern of the interlayer interface were investigated using a self-designed loading device and digital image correlation technique, and pore defects inside the printed structure were characterized using X-ray computed tomography. The results showed that the compressive and flexural strengths of 3DPNAC showed varying degrees of anisotropic characteristics and differential development patterns of mechanical strength with curing time. The filament interfacial bonding system was proposed, and the bond strength of 3DPNAC was more than twice that of 3DPM. The geometry of pore defects in 3DPNAC evolved with pore volume variations. Finally, the evolution of pore defect formation was analyzed, and the effect mechanisms of pore defects on 3DPNAC mechanical properties were revealed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
