In-line carbonation and 3d-printing of calcium silicate-based cement paste with cellular architecture
AssigneeThe Trustees of Princeton University
InventorsNadia RALSTON, Reza MOINI, William MAKINEN, Shashank GUPTA
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Abstract
System and techniques for in-situ carbonation in a 3D printing process may be provided. The system may include a nozzle for in-situ carbonation in a 3D printing process (e.g., of a cement). The layer-3D-printing process with induced interfaces may include a device that enables layer-wise fabrication and enhanced carbonation. Additionally, the techniques may include a design of materials architecture (arrangement) by slicing them in cellular fashion that also enhances carbonation. Further, a printable wollastonite-based paste is disclosed.
Claims17
A print head, comprising:
- a print head body defining a central lumen extending from a first end to a second end of the print head body along a central axis, the first end defining a first inlet for receiving a 3D printable material, the second end defining a first outlet for distributing the 3D printable material;
- a plurality of gas outlet nozzles, each gas outlet nozzle distributed around the first outlet and configured to direct a gas away from the second end of the print head body and reach any output 3D printable material, each gas outlet nozzle being operably coupled to an internal distribution cavity defined by the print head body, the internal distribution cavity being disposed around the central lumen, the print head body further defining a gas inlet coupled to the internal distribution cavity, the gas inlet configured to be operably coupled to a source of a gas.
A method for in-situ carbonation, comprising forming a deposited 3D printed material by depositing a 3D printable material while carbon dioxide gas is diffused onto the deposited 3D printed material.
A method for layer-3D printing with induced interfaces, comprising:
- depositing a 3D printable material with a first porosity in the presence of carbon dioxide;
- depositing the 3D printable material with a second porosity in the presence of carbon dioxide, the second porosity being greater than the first porosity;
- and
- allowing the carbon dioxide to diffuse into the 3D printable material, wherein the 3D printable material with the second porosity will have an increased degree of carbonation.
A method for designing 3D objects, comprising:
- receiving information representative of a 3D object;
- forming a plurality of slices of the 3D object in a cellular fashion, each slice determined based on one or more parameters, the plurality of slices determined to enhance carbonation of at least a portion of the 3D object;
- and
- outputting a path for a 3D printer based on the plurality of slices in a predetermined format.
A composition, comprising:
- wollastonite;
- water, at least about 40% by weight of the composition;
- a superplasticizer, at up to about 0.25% % by weight of the composition;
- and
- a viscosity-modifying admixture (VMA), at up to about 0.14% by weight of the composition.
Dependencies are inferred from the claim text.