Develop a “metamaterial Light-Weight-Concrete (LWC)” technology to fabricate lightweight and high-performance structural elements, with potential applications for pavement systems, bridge decks, and prefabricated bridge elements. A suite of metamaterial LWC systems with tunable compressive strength and ductility will be evaluated. A range of selected metamaterial lattices will be 3D printed and extensive numerical and experimental studies will be performed to evaluate and predict the mechanical properties of LWC cubes and beams reinforced by the MM lattices. The goal is to design LWC materials with a minimum compressive strength of 50 MPa, minimum toughness of 10 kN⋅mm, and maximum unit weight of 1200kg/m3.