USE OF AN ACIDIC SALT OF IRON (III) AS ADDITIVE FOR CEMENT, MORTAR OR CONCRETE
A method includes adding an acidic salt of Iron (III) as additive to cement, mortar or concrete.
1 . A method comprising adding an acidic salt of Iron (III) as additive to cement, mortar or concrete.
2 . The method according to claim 1 , wherein the acidic salt of Iron (III) is selected from the group comprising iron(III) sulfate, iron (III) chloride, iron (III) nitrate, iron (III) carboxylate and combinations thereof.
3 . The method according to claim 1 , wherein alkanolamine is used in combination with the acidic salt of Iron(III).
4 . Composition of additives for cement, mortar or concrete, comprising an acidic salt of Iron (III) and an alkanolamine.
5 . The composition of additives according to claim 4 , wherein the alkanolamine is selected from the group comprising N,N bis-(2-hydroxyethyl)-2-propanolamine) (DIEPA), N, N bis-(2-hydroxypropyl)-N-(hydroxyethyl) amine (EDIPA), diethanolamine (DEA), triethanolamine (TEA), triisopropanolamine (TIPA), hydroxyethyldiethylenetriamine (HEDETA), and aminoethylethanolamine (AEEA) and combinations thereof.
6 . The composition of additives according to claim 4 , further comprising a source of calcium oxide.
7 . The composition of additives according to claim 4 , further comprising an antifoaming agent.
8 . Method for improving compressive strength of hydraulic cement composition comprising a Portland cement, wherein an acidic salt of Iron (III) is added to the hydraulic cement composition.
9 . The method according to claim 8 , wherein the salt of Iron (III) is selected from the group comprising iron(III) sulfate, iron (III) chloride, iron (III) nitrate, iron (III) carboxylate and combinations thereof.
10 . The method according to claim 8 , wherein an alkanolamine is further added to the hydraulic cement composition.
11 . The method according to claim 10 , wherein the alkanolamine is selected from the group comprising N,N bis-(2-hydroxyethyl)-2-propanolamine) (DIEPA), N, N bis-(2-hydroxypropyl)-N-(hydroxyethyl) amine (EDIPA), diethanolamine (DEA), triethanolamine (TEA), triisopropanolamine (TIPA), hydroxyethyldiethylenetriamine (HEDETA), and aminoethylethanolamine (AEEA) and combinations thereof.
12 . The method according to claim 8 , wherein a source of calcium oxide is further added to the hydraulic cement composition.
13 . The method according to claim 8 , wherein an antifoaming agent is further added to the hydraulic cement composition.
14 . The method according to claim 8 , wherein at least 0.1% by weight, compared to the total weight of binder, of salt of Iron (III) is added.
15 . The method according to claim 8 , wherein at least 0.02% by weight, compared to the total weight of binder, of alkanolamine is added.
16 . Cement hydraulic binder comprising Portland cement and at least one acidic salt of Iron (III).
17 . The cement hydraulic binder according to claim 16 , comprising at least 0.1% by weight of Iron (Fe) compared to the total weight of binder.
18 . The cement hydraulic binder according to claim 16 , further comprising an alkanolamine.
19 . The cement hydraulic binder according to claim 16 , comprising at least 0.8% by weight, compared to the total weight of binder, of free calcium oxide.
20 . The cement hydraulic binder according to claim 16 , further comprising an antifoaming agent.
21 . Hydraulic cement composition comprising the cement hydraulic binder as defined in claim 16 .
22 . A structure formed from the hydraulic cement composition as defined in claim 21 .