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US 12,091,857 B2Granted
Three-dimensional printing of cementitious compositions
AssigneeThe Penn State Research Foundation
InventorsAli M. Memari, Maryam Hojati, Jose Manuel Pinto Duarte, Shadi Nazarian, Aleksandra Radlinska, Sven Bilen, Nicholas Meisel
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Abstract
Embodiments of the disclosure provide a printable cementitious composition comprising a cement binder, an aggregate, at least one pozzolanic additive, an accelerator, water, and nanoclay.
Claims20
A printable cementitious composition comprising:
- (i) from 20 wt % to 40 wt % of a cement binder;
- (ii) from 30 wt % to 50 wt % of an aggregate;
- (iii) from 5 wt % to 15 wt % of at least one pozzolanic additive;
- (iv) from 0.1 wt % to 1.5 wt % of an accelerator;
- (v) from 10 wt % to 20 wt % of water;
- and
- (vi) from 0.01 wt % to 2 wt % of a nanoclay.
4 more elements
A method comprising:
- (i) depositing a first filament of a cementitious material on a printing surface from a nozzle of a print head, wherein the cementitious material comprises from 20 wt % to 40 wt % of a cement binder, from 30 wt % to 50 wt % of an aggregate, from 5 wt % to 15 wt % of at least one pozzolanic additive, from 0.1 wt % to 1.5 wt % of an accelerator, from 10 wt % to 20 wt % of water, and from 0.01 wt % to 2 wt % of a nanoclay;
- and
- (ii) depositing at least one additional filament of the cementitious material atop the first filament thereby forming a three-dimensional structure.
A printable cementitious composition comprising:
- (i) a cement binder;
- (ii) an aggregate;
- iii) at least one pozzolanic additive that includes, based on the total weight of the printable composition, from 0.5 wt % to 5 wt % silica fume, from 1 wt % to 20 wt % slag, and from 0.5 wt % to 6 wt % metakaolin;
- (iv) an accelerator;
- (v) water;
- and
- (vi) nanoclay.
4 more elements
Dependencies are inferred from the claim text.