Compositions and method to improve the strength development of calcium silicate-based cements and concretes

Patent metadata

Field	Value
Publication number	US-2019152859-A1
Application number	US-201816198129-A
Country	US
Kind code	A1
Filing date	Nov 21, 2018
Priority date	Nov 21, 2017
Publication date	May 23, 2019
Grant date	—

Abstract

Calcium silicate-based cements and concretes are disclosed, which result in concrete compositions that have an improved strength development. A cement product includes a plurality of particles of a carbonatable calcium silicate cement and a first additive; wherein, the first additive is an organic molecule with at least one primary, secondary or tertiary amine group.

First claim

1 . A cement product comprising:
a plurality of particles of a carbonatable calcium silicate cement and a first additive; wherein, the first additive is an organic molecule with at least one primary, secondary or tertiary amine group.

2 . The cement product of claim 1 , comprising a second additive wherein, the second additive is a source of calcium sulfate.

3 . The cement product of claim 1 , wherein, the first additive is an organic molecule with at least one primary, secondary or tertiary amine group comprising at least one hydroxy group.

4 . The cement product of claim 3 , wherein, the first additive is one or a combination of one or more hydroxyalkylamine(s) that has a maximum molar weight of 1000 g/mol.

5 . The cement product of claim 4 , wherein, the first additive is selected from the group consisting of N,Nbis-(2-hydroxyethyl)-2-propanolamine) (DIEPA), N,Nbis-(2-hydroxypropyl)-N-(hydroxyethyl) amine (EDIPA), diethanolamine (DEA), triethanolamine (TEA), triisopropanolamine (TIPA), triethylenepentamine (TEPA), hydroxyethyldiethylenetriamine (HEDETA) and aminoethylethanolamine (AEEA) or a combination thereof.

6 . A concrete product comprising:
the cement product of claim 1 , wherein the cement product is cured with a greenhouse gas comprising carbon dioxide to produce a structure comprising of a core, wherein the core comprises a portion of the unreacted calcium silicate particle; a silica-rich layer covering at least a portion of the surface of the core; and an exterior layer covering at least a portion of the silica-rich first layer, wherein, the exterior layer comprises calcium carbonate; and a plurality of aggregate particles.

7 . A method for preparing a concrete product comprising:
mixing the cement product of claim 1 with a plurality of aggregate particles to form a concrete product having a plurality of pores; placing and forming the concrete product in molds; curing the formed concrete product with a greenhouse gas comprising carbon dioxide to produce a structure comprising of a core, wherein the core comprises of a portion of the unreacted carbonatable calcium silicate particle; a silica-rich layer covering at least a portion of the surface of the core; and an exterior layer covering at least a portion of the silica-rich first layer, wherein, the exterior layer comprises calcium carbonate.

8 . A carbonatable composition comprising:
calcium silicate; one or more discrete calcium silicate phases selected from CS (wollastonite or pseudowollastonite), C3S2 (rankinite), C2S (belite, larnite, bredigite), and an amorphous calcium silicate phase at about 30% or more by mass of the total phases; and calcium aluminate accounting for about 0.1% to about 2.5% by weight of the carbonatable composition, wherein elemental Ca and elemental Si are present in the composition at a molar ratio from about 0.8 to about 1.2; and metal oxides of Al, Fe and Mg are present in the composition at about 30% or less by mass, the first and the second additives as defined in claim 2 .

9 . The carbonatable composition of claim 8 , wherein the first and second additives are triethanolamine and gypsum.

Assignees

• Holcim Technology Ltd
• Solidia Technologies Inc

Inventors

• Briaud Vincent
• Cervera Frédéric
• Meyer Vincent
• Sahu Sadananda
• Tas Ahmet Cuneyt
• Ravikumar Deepak
• Bryant Jason Elizan
• Seth Anuj

Classifications

• C04B2111/00019

  Carbon dioxide sequestration · CPC title

• C04B40/0231

  Carbon dioxide hardening · CPC title

• C04B2201/52

  High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC] · CPC title

• C04B28/188 Primary

  the Ca-silicates being present in the starting mixture · CPC title

• C04B22/124

  Chlorides of ammonium or of the alkali or alkaline earth metals, e.g. calcium chloride · CPC title