US 12,215,056 B2
Additives of graphene nanomaterials for the improvement of cementitious compositions, cementitious composition, a process for preparing a reinforced concrete, a reinforced concrete and its use
Juan Angel Ruiz Moya, Bullas (ES); Amaya Romero Izquierdo, Yecla (ES); and Maria del Prado Lavin Lopez, Yecla (ES)
Assigned to Graphenano S.L., Yecla (ES); and Juan Angel Ruiz Moya, Bullas (ES)
Appl. No. 17/285,931
Filed by Graphenano S.L., Yecla (ES); and Juan Angel Ruiz Moya, Bullas (ES)
PCT Filed Oct. 16, 2019, PCT No. PCT/EP2019/000295
§ 371(c)(1), (2) Date Apr. 16, 2021,
PCT Pub. No. WO2020/078578, PCT Pub. Date Apr. 23, 2020.
Claims priority of application No. 18382738 (EP), filed on Oct. 16, 2018.
Prior Publication US 2021/0347693 A1, Nov. 11, 2021
Int. Cl. C04B 14/02 (2006.01); C04B 28/02 (2006.01); C04B 40/00 (2006.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01); C04B 111/28 (2006.01)
CPC C04B 14/026 (2013.01) [C04B 28/02 (2013.01); C04B 40/0039 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C04B 2111/28 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A cementitious composition comprising cement and an additive of graphene nanomaterials, the additive including a mixture of graphene nanofibers, graphene oxide (GO), a dispersing agent (D) and a superplasticizer (SP), wherein said mixture comprises at least two different graphene nanofibers, selected among:
graphene nanofibers of high specific surface area (GNF-HS), in an amount of between 10% and 75% by weight with respect to the additive, having an area comprised between 260 to 400 m2/g and length of 0.02 to 2 μm;
graphene nanofibers of low specific surface area (GNF-LS), having an area comprised between 70 to 249 m2/g and length of 0.02 to 2 μm; or
graphene nanofibers of long length (GNF-LL), with a specific surface area comprised between 30 to 100 m2/g and a length of 5 to 200 μm,
wherein the superplasticizer (SP) is a polycarboxylate ether-based superplasticizer (PCEs) or a sulfonated superplasticizer,
wherein the amount of dispersing agent (D) of the additive is of about 1% on the total weight of the graphene nanofibers and graphene oxide,
wherein the graphene nanofibers have an average diameter comprised between 2 nm and 200 nm, and
wherein the additive contains a total amount of graphene nanofibers and graphene oxide of between 0.0002% and 0.002% by weight with respect to the weight of the cement in the cementitious composition.