US 12,330,332 B2
Methods and systems for 3D printing of reactive vaterite cement
Ryan J Gilliam, San Jose, CA (US); Craig W Hargis, Campbell, CA (US); and Kasra Farsad, San Jose, CA (US)
Assigned to Arelac, Inc., San Jose, CA (US)
Filed by Arelac, Inc., San Jose, CA (US)
Filed on Nov. 8, 2022, as Appl. No. 17/982,747.
Claims priority of provisional application 63/277,330, filed on Nov. 9, 2021.
Prior Publication US 2023/0145402 A1, May 11, 2023
Int. Cl. B28B 1/00 (2006.01); B28B 1/08 (2006.01); B33Y 40/00 (2020.01); C04B 7/34 (2006.01); C04B 7/43 (2006.01); C04B 28/12 (2006.01); C04B 40/00 (2006.01); C04B 40/04 (2006.01); C04B 103/54 (2006.01); C04B 111/00 (2006.01)
CPC B28B 1/001 (2013.01) [B28B 1/08 (2013.01); B33Y 40/00 (2014.12); C04B 7/34 (2013.01); C04B 7/434 (2013.01); C04B 28/12 (2013.01); C04B 40/0067 (2013.01); C04B 40/0071 (2013.01); C04B 40/04 (2013.01); C04B 2103/54 (2013.01); C04B 2111/00181 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A 3D cement printing machine comprising:
a printing head configured to dispose reactive vaterite cement;
a feed system, in material communication with the printing head, the feed system configured to provide a feed of reactive vaterite onto the printing head;
a feed of reactive vaterite cement, disposed in the feed system;
a material chamber operably connected to the feed system, configured to provide a condition to prevent transformation of the reactive vaterite to aragonite or calcite, wherein the condition comprises a pressure of 10-1,000 psi and a temperature of 20-300° C.; and
a system operably connected to the 3D printing machine system and configured to produce the composition comprising reactive vaterite cement, comprising:
a calcining reactor configured to calcine limestone to form a mixture comprising lime and a gaseous stream comprising carbon dioxide;
a dissolution reactor operably connected to the calcination reactor configured for dissolving the mixture comprising lime in an aqueous N-containing salt solution to produce an aqueous solution comprising calcium salt; and
a treatment reactor operably connected to the dissolution reactor configured for treating the aqueous solution comprising the calcium salt with the gaseous stream comprising carbon dioxide to form the composition comprising the reactive vaterite cement.