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AssigneesBoral Resources (WA) Limited, Boral Construction Materials Limited, Boral B.V.
InventorsBogdan H. DANA, David HOCKING, Louise M. KEYTE
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Compositions of alkali activators useful in cement mixtures and concrete are described. The composition may include anhydrous sodium sulfate, a dispersant, a humectant, at least one additive, and water. Exemplary additives include rheology modifiers, de-foamers, biocide agents, surface tension agents (as synthetic additives or additives derived from naturally occurring sources), and combinations thereof. The composition may include about 20% by weight to about 80% by weight solids, based on the total weight of the composition, for example. Cement mixtures and concrete compositions are also described, as well as methods of preparing such compositions, cement mixtures, and concrete compositions.
A composition comprising:
The composition of any one of the preceding claims, wherein the composition comprises from about 30% by weight to about 75% by weight of the activator based on the total weight of the composition.
The composition of any one of the preceding claims, wherein the composition comprises from about 1% by weight to about 20% by weight of the dispersant based on the total weight of the composition.
The composition of any one of the preceding claims, wherein the dispersant comprises a polymer, copolymer, or ionic compound of synthetic nature or from a naturally derived material/biopolymer;
The composition of any one of the preceding claims, wherein the composition comprises from about 10% by weight to about 40% by weight of the humectant based on the total weight of the composition.
The composition of any one of the preceding claims, wherein the humectant comprises an alcohol, optionally a polyol such as glycerol.
The composition of any one of the preceding claims, wherein the composition comprises from about 0.1% by weight to about 0.5% by weight of a biocide agent based on the total weight of the composition.
The composition of any one of the preceding claims, wherein the biocide agent comprises an isothiazolinone, optionally benzisothiazolinone and/or methyl-4-isothiazolin-3-one.
The composition of any one of the preceding claims, wherein the composition comprises from about 0.1% by weight to about 0.5% by weight of a de-foamer based on the total weight of the composition.
The composition of any one of the preceding claims, wherein the de-foamer comprises silicone, a surfactant capable of promoting foam burst, or a hyper-branched polymer.
The composition of any one of the preceding claims, wherein the composition comprises from about 0.1% by weight to about 3.0% by weight of a rheology modifier based on the total weight of the composition.
The composition of any one of the preceding claims, wherein the rheology modifier comprises a thixotropic agent or a thickener, optionally wherein the rheology agent comprises a clay such as an organo-clay or synthetic clay, a hydrogenated castor wax, a polyamide, a silica such as fumed silica or colloidal silica, a cellulosic material, or a hydrophobically-modified material such as a hydrophobically modified ethoxylated urethane, a hydrophobically-modified alkali-swellable emulsion, a hydrophobically-modified hydroxy ethyl cellulose), or a hydrophobically modified ethoxylated urethane alkali swellable emulsion.
The composition of any one of the preceding claims, wherein the composition has a Brookfield viscosity at 25° C. within a range of about 1000 cP to about 3 500 cP.
The composition of any one of the preceding claims, wherein the composition has a pH equal to or greater than 8.0.
The composition of any one of the preceding claims, wherein the composition is stable for at least one week at a temperature between 2° C. and 45° C., optionally wherein the viscosity of the composition at 25° C. varies less than 10% during the at least one week.
The composition of any one of the preceding claims, wherein the composition is a homogeneous mixture.
A method of making the composition of any one of the preceding claims, the method comprising:
A composition comprising:
A method of making a cement mixture, the method comprising combining General Purpose cement and a supplementary cementitious material with a composition comprising:
Dependencies are inferred from the claim text.