US 12,441,658 B2
Non-hydration strength in cementitious compositions
Byong-Wa Chung, Honolulu, HI (US); Nathan A. Tregger, Northborough, MA (US); Elise Berodier, Lausanne (CH); Elizabeth Burns, Windham, NH (US); Ernie Rocha, Merrimack, NH (US); Ezgi Wilson, Sydney (AU); and Mark F. Roberts, North Andover, MA (US)
Assigned to GCP Applied Technologies Inc., Malvern, PA (US)
Appl. No. 17/270,565
Filed by GCP Applied Technologies Inc., Cambridge, MA (US)
PCT Filed Aug. 29, 2019, PCT No. PCT/US2019/048830
§ 371(c)(1), (2) Date Feb. 23, 2021,
PCT Pub. No. WO2020/047267, PCT Pub. Date Mar. 5, 2020.
Claims priority of provisional application 62/724,282, filed on Aug. 29, 2018.
Prior Publication US 2021/0355031 A1, Nov. 18, 2021
Int. Cl. B28C 7/12 (2006.01); B28C 5/42 (2006.01); B33Y 70/10 (2020.01); C04B 22/14 (2006.01); C04B 24/26 (2006.01); C04B 28/04 (2006.01); C04B 40/00 (2006.01); B33Y 30/00 (2015.01); B33Y 80/00 (2015.01); C04B 103/00 (2006.01); C04B 111/00 (2006.01)
CPC C04B 28/04 (2013.01) [B28C 5/4258 (2013.01); B28C 7/128 (2013.01); B33Y 70/10 (2020.01); C04B 22/14 (2013.01); C04B 24/2647 (2013.01); C04B 24/2652 (2013.01); C04B 40/0028 (2013.01); B33Y 30/00 (2014.12); B33Y 80/00 (2014.12); C04B 2103/0062 (2013.01); C04B 2103/0095 (2013.01); C04B 2103/0096 (2013.01); C04B 2111/00155 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for achieving non-hydration strength in a cementitious composition, comprising:
(A) providing a settable composition comprising a hydratable cementitious binder, a plurality of aggregates, and water in an amount effective to establish a hydrating cementitious matrix;
(B) providing a polymerizable component system comprising (i) an ethylenic monomer having at least one hydrophilic group, (ii) at least one cross-linker monomer;
and (iii) a first component of a two-component reduction-oxidation (“redox”) system, to establish a cross-linking system within the hydrating cementitious matrix;
(C) mixing together the settable composition, the polymerizable component system, and a second component of the redox system such that the first and second components of the redox system become mixed together to activate cross-linking of the polymerizable component system within the hydrating cementitious matrix of the settable composition; and
(D) flowing the mixture from step (C) through a nozzle, into a concrete formwork or mold, or along a chute and into a concrete formwork or mold, whereby the polymerizable component system undergoes polymerization within the hydrating settable cementitious matrix, wherein
the mixing of the settable composition of step (A) and the polymerizable component system of step (B) is accomplished using a batch mixer or continuous mixer, and the second component of the redox system of step (C) is introduced into the settable composition after the mixing of the settable composition with the polymerizable component system, the method increases the non-hydration strength before setting of the cementitious composition begins; and
the ethylenic monomer having at least one hydrophilic group is 2-acrylamido-2-methylpropane sulfonic acid (“AMPS”) monomer, and the cross-linker monomer is N,N′-methylene bis(acrylamide) (“bis-AAm”), and the weight ratio of AMPS:bis-AAm is from 5:95 to 99.9:0.1.