Future Implications of Additive Manufacturing in Construction: Impact Resistance of 3D Printed Concrete Structures

Abstract

With the recent advancements in 3D-printing technology, the construction industry has adapted uses for additive manufacturing using printers to create concrete structures. 3D printing concrete offers an extremely beneficial alternative to traditional methods in terms of the economical, environmental, and social interests that could potentially revolutionize the assembly and manufacturing of large-scale structures. By observing the different mechanical properties of printed concrete structures, the structural integrity can be engineered and designed to optimize performance and durability. This thesis aims to use 3D printing technology to observe the impact resistance of concrete samples with different geometries to explore which variations can withstand and absorb the highest amount of impact energy. Impact testing will be done following modifications to the ACI 544.2R procedures for weight drop impact testing on concrete cylinders. A monolithic cast sample will serve as the control whose impact resistance and ductility index will be compared to the following printed architectures: concentric cylinder, Bouligand structures with pitch angles of 22.5°, 45°, and 90°. Examining the impact resistance and breakage patterns will indicate the best structural patterns for 3D printed concrete structures which could in turn translate to the strength designs for larger projects.