IP Library › Granted Patent US 12686147
Granted Patent B2
US 12686147 · App. 18/586,364 · Granted Jul 21, 2026

3D printable cementitious ink including electromagnetic pulse resistant binders

Inventors: Alexander Le Roux (Austin, TX); Theodore Richard Cera (Austin, TX); J. Cole Sargent (Austin, TX); Aida Margarita Ley Hernandez (Austin, TX); Daniel Galvez Moreno (Austin, TX); Kunal Kupwade-Patil (Austin, TX)
Assignee: ICON Technology, Inc.
B28B1/001C04B14/026C04B14/06C04B14/28C04B14/308C04B28/02E04G21/0436C04B2111/00146C04B2111/00181
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Quick Facts
Patent No.
US 12686147
App. No.
18/586,364
Granted
Jul 21, 2026
Kind
B2
Abstract

An electromagnetic interference (EMI) resistant cementitious ink comprising a hydraulic cement, calcium carbonate, silica sand, taconite material, and a conductive material. A ratio of the silica sand to the taconite material is 1:1. In some embodiments, the taconite material includes taconite powder and fine taconite aggregate having a ratio of 1:1. In some embodiments, the conductive material includes carbon-based nanoparticles in solution. In further embodiments, the EMI-resistant cementitious ink has a shielding effectiveness in accordance with ASTM D4935-18 of at least 4.0 dB.

Claims (24)

1 . 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.

2 . The method of claim 1 , wherein the taconite material includes taconite powder and taconite aggregate.

3 . The method of claim 2 , wherein a ratio of taconite powder to taconite aggregate is 1:1.

4 . The method of claim 1 , further comprising;

moving the nozzle of the printing system to form one or more subsequent elongated beads atop previously dispensed elongated beads.

5 . The method of claim 1 , wherein the EMI-resistant cementitious ink has a shielding effectiveness in accordance with ASTM D4395-18 of at least about 4.0 dB.

6 . The method of claim 1 , further comprising:

adding one or more of carbon nanowires and carbon nanofibers to liquid carbon-based nanoparticles.

7 . The method of claim 1 , further comprising adding water to a dry mix to form a wet mix that further comprises:

adding additives including one or more of a superplasticizer, an air entrainer, and a shrinkage reducing admixture.