3D printable cementitious ink including electromagnetic pulse resistant binders

A method of forming a wall structure of a building comprising:

• providing a printing system comprising:
• a mixer;
• a pump;
• and
• a hose assembly including a nozzle,
• wherein the pump is configured to deliver an electromagnetic interference (EMI) resistant cementitious ink from the mixer to the nozzle via the hose assembly, and
• providing the EMI-resistant cementitious ink to the mixer of the printing system, wherein the EMI-resistant cementitious ink comprises:
• a hydraulic cement;
• calcium carbonate;
• silica sand;
• taconite material, wherein a ratio of the silica sand to the taconite material is 1:1;
• and
• carbon-based nanoparticles;
• pumping the EMI-resistant cementitious ink through the hose assembly of the printing system to dispense the EMI-resistant cementitious ink from the nozzle;
• moving the nozzle of the printing system along a surface to form a first elongated bead of the EMI-resistant cementitious ink;
• and
• moving the nozzle of the printing system along the first elongated bead to form a second elongated bead of the EMI-resistant cementitious ink atop the first elongated bead.