Abstract: The present invention is directed generally at three-dimensional printing and more particularly to using three-dimensional (3D) printing to produce concrete and concrete-like (i.e. hempcrete) structures. Recently, 3D printing has advanced to the point where it is now possible to 3D print more complex concrete structures, such as homes. Unfortunately, prior art methods of 3D printing concrete structures have numerous drawbacks. For example, many existing systems suffer from excessive mechanical complexity and/or are susceptible to jamming (e.g. caused by dirt getting into delicate mechanisms). Other problems include difficulty with field maintainability, a lack of horizontal and vertical construction scalability, excessive weight and/or difficulty in printing structures on uneven or difficult ground. Also, existing devices are difficult and time consuming to assemble and disassemble in the field, thereby increasing project costs. The present innovation successfully addresses all of these limitations.

Abstract: A three-dimensional printing system that includes a nozzle and means for positioning the nozzle. The nozzle is configured to dispense a concrete mix. The means for positioning the nozzle may include cable and control systems. The cable system includes positioning cables that are connected to the nozzle. The control system includes control modules each connected to a different corresponding one of the positioning cables. Each of the control modules controls a distance that the corresponding positioning cable positions the nozzle from the control module. Alternatively, the means for positioning the nozzle may include first and second flying drones.