A self-reinforcing, crystalline-fibrous, polymerized concrete. It can be poured directly into forms, worked by hand or extruded by 3D printing construction equipment. Due to the nature of its structure, rebar is unnecessary, and it is hundreds of times stronger than ordinary concrete, while maintaining some flexibility. It is the standard construction material for most ground-based structures. --- The downside is that the crystalline-fibrous reinforcement material is exceptionally hazardous to breathe. When buildings are being demolished, extensive dust control methods must be used. Ordinary wear and tear (or eventual degradation) does not create the same level of dangerous dust, thus it is considered an acceptable trade-off for rapid and/or computer-aided construction. --- In the case of military structures, which may be damaged in combat. An alternative form of fibrous reinforcement is used, but must be placed by hand or inserted by specialized equipment. This is known as Polycrete-M or Molycrete.