A novel internal curing method for 3D-printed geopolymer structures reinforced with a steel cable: Electro-heating

•Electro-heating is a novel internal curing method for 3D-printed geopolymer structures.•The heating ability of steel cable is promising for developing buildability of geopolymers.•An easy and safe triac circuit has been made for in-situ application of these structures. Buildability and structural integrity are the inherent challenges of 3D printed geopolymer structures needed to be overcome. Reinforcing with steel cable ensuring a higher structural integrity of the printed structure can simultaneously improve the buildability due to the heating capability of this component. The controllable instant heating capability of steel cable was achieved by the use of a specific circuit system in the study. As a novel internal curing technique, electro-heating is recommended in the additive manufacturing of steel cable-reinforced geopolymer structures by the authors.