Hydraulic cement and composition employing the same

Claim 2

A hydraulic cement consisting essentially of, by weight the following cement forming constituents: from about 90.8 to 99 parts Class C fly ash from about 0.4 to 4.2 parts alkali metal activator from about 0.6 to 5 parts citric acid from about 0 to 3 parts set control materials, said alkali metal activator being selected from the class consisting of potassium hydroxide, potassium carbonate, sodium hydroxide, and sodium carbonate; and said admixture is at least one material selected from the class consisting of borax; a sodium salt of a copolymer of an unsaturated carboxylic acid and the hydroxyalkyl ester of such acid; a modified lignosulfonate, with catalyst; and a dispersion of sulfonated naphthalene formaldehyde condensate, a gluconate, and a lignosulfonate.

Claim 3

The hydraulic cement of claim 1 wherein the alkali metal activator is potassium hydroxide.

Claim 4

The hydraulic cement of claim 1 mixed with from 0.165 to 0.220 part water for each part of cement forming constituents.

Claim 5

The hydraulic cement of claim 3 wherein the amount of water is from 0.18 to 0.22 part.

Claim 6

A mortar formed from the hydraulic cement of claim 1 including sand in a ratio to cement forming constituents of 1.5-3.0:1.0.

Claim 7

The mortar of claim 5 wherein the ratio is 1.5-2.5:1.0.

Claim 8

The hydraulic cement of claim 1 having from 0.6 to 3.0 parts citric acid and from 1.0 to 2.9 parts potassium hydroxide.

Claim 9

The hydraulic cement of claim 1 having from 3.0 to 5.0 parts citric acid and from 0.4 to 3.8 parts potassium hydroxide.

Claim 10

A two part composition for hydraulic cement, wherein the two parts are blended prior to preparation of the cement, consisting essentially of by weight: a. a first part of from about 90.8 to 99 parts, Class C fly ash; and b. a second part containing: (1) from about 0.4 to 4.2 parts alkali metal activator (2) about 0.6 to 5 parts citric acid; and (3) about 0 to 3 parts admixture, wherein said alkali metal activator is selected from the class group consisting of potassium hydroxide, potassium carbonate, sodium hydroxide, and sodium carbonate; and said admixture is at least one material selected from the class consisting of borax; a sodium salt of a copolymer of an unsaturated carboxylic acid and the hydroxyalkyl ester of such acid; a modified lignosulfonate, with catalyst; and a dispersion of sulfonated naphthalene formaldehyde condensate, a gluconate, and a lignosulfonate.

Claim 11

A two part composition for hydraulic cement, wherein the two parts are blended prior to preparation of the cement, consisting essentially of by weight: a. a first part of from about 90.8 to 99 parts, Class C fly ash; and b. a second part containing: (1) from about 0.4 to 4.2 parts alkali metal activator (2) about 0.6 to 5 parts citric acid; and (3) about 0 to 3 parts admixture, wherein said alkali metal activator is selected from the class group consisting of potassium hydroxide, potassium carbonate, sodium hydroxide, and sodium carbonate; and said admixture is at least one material selected from the class consisting of borax; a sodium salt of a copolymer of an unsaturated carboxylic acid and the hydroxyalkyl ester of such acid; a modified lignosulfonate, with catalyst; and a dispersion of sulfonated naphthalene formaldehyde condensate, a gluconate, and a lignosulfonate.

Claim 12

The composition of claim 9 wherein the alkali metal activator is potassium hydroxide.

Claim 13

The composition of claim 9 mixed with from 0.165 to 0.220 part water for each part the hydraulic cement composition.

Claim 14

The composition of claim 11 wherein the amount of water is from 0.18 to 0.22 part.

Claim 15

A mortar formed from the composition of claim 9 including sand in a ratio to hydraulic composition of 1.5-3.0:1.0.

Claim 16

The mortar of claim 13 wherein the ratio is 1.5-2.5:1.0.

Claim 17

The composition of claim 9 having from 0.6 to 3.0 parts citric acid and from 1.0 to 2.9parts potassium hydroxide.

Claim 18

The composition of claim 9 having from 3.0 to 5.0 parts citric acid and from 0.4 to 3.8parts potassium hydroxide.

Claim 19

The composition of claim 9 wherein the alkali metal activator is potassium hydroxide.

Claim 20

A hydraulic cement comprising, by weight, approximately: 96.29 parts Class C fly ash 1.41 parts potassium hydroxide 1.28 parts citric acid 1.02 parts borax

Claim 21

A hydraulic cement comprising, by weight, approximately: 96.29 parts Class C fly ash 1.41 parts potassium hydroxide 1.28 parts citric acid 1.02 parts borax

Claim 22

A hydraulic cement comprising, by weight, approximately: 95.98 parts Class C fly ash 1.40 parts potassium hydroxide 1.28 parts citric acid 1.02 parts borax 0.05 part sodium salt of a copolymer of an unsaturated carboxylic acid and the hydroxyalkyl ester of said acid

Claim 23

A hydraulic cement comprising, by weight, approximately: 95.98 parts Class C fly ash 1.40 parts potassium hydroxide 1.28 parts citric acid 1.02 parts borax 0.05 part sodium salt of a copolymer of an unsaturated carboxylic acid and the hydroxyalkyl ester of said acid

Claim 24

A hydraulic cement comprising, by weight, approximately: 96.41 parts Class C fly ash 1.28 parts potassium hydroxide 1.28 parts citric acid 1.03 parts borax

Claim 25

A hydraulic cement comprising, by weight, approximately: 96.41 parts Class C fly ash 1.28 parts potassium hydroxide 1.28 parts citric acid 1.03 parts borax

Claim 26

A hydraulic cement comprising, by weight, approximately: 96.53 parts Class C fly ash 1.16 parts potassium hydroxide 1.28 parts citric acid 1.03 parts borax

Claim 27

A hydraulic cement comprising, by weight, approximately: 96.53 parts Class C fly ash 1.16 parts potassium hydroxide 1.28 parts citric acid 1.03 parts borax

Claim 28

A hydraulic cement comprising, by weight, approximately: 96.66 parts Class C fly ash 1.03 parts potassium hydroxide 1.28 parts citric acid 1.03 parts borax

Claim 29

A hydraulic cement comprising, by weight, approximately: 96.66 parts Class C fly ash 1.03 parts potassium hydroxide 1.28 parts citric acid 1.03 parts borax

Claim 30

A hydraulic cement comprising, by weight, approximately: 96.79 parts Class C fly ash 0.90 part potassium hydroxide 1.28 parts citric acid

Claim 31

A hydraulic cement comprising, by weight, approximately: 96.79 parts Class C fly ash 0.90 part potassium hydroxide 1.28 parts citric acid

Claim 32

03 parts borax

Claim 33

03 parts borax

Claim 34

A hydraulic cement comprising, by weight, approximately: 94.95 parts Class C fly ash 3.79 parts potassium carbonate 1.26 parts citric acid

Claim 35

A hydraulic cement comprising, by weight, approximately: 94.95 parts Class C fly ash 3.79 parts potassium carbonate 1.26 parts citric acid