3D printed concrete is a special type of concrete, which can be deposited through a 3D printer layer by layer without any formwork support and vibration process. Its important performance indexes, including workability, setting and hardening time, and mechanical properties, can be optimized by materials selection and printing parameters. To date, many building structures have been successfully printed using 3D printed concrete technology, some of which have even achieved their real applications. The 3D printed concrete has a great potential for practical applications, such as the affordable housing construction in low-income countries, military bunkers when the soldiers fighting in the wild, and complex constructions where the formwork is difficult to manufacture. The 3DCP research group addresses the scientific challenges to develop the technology towards structural applications of 3D printed concrete.