Amine sacrificial agents and methods and products using same
A method of producing cementitious mixtures containing fly ash as one of the cementitious components, under air entrainment conditions is described. The method involves forming a mixture comprising water, cement, fly ash, optionally other cementitious materials, aggregate, conventional chemical admixtures, and an air entrainment agent and agitating the mixture to entrain air therein. Additionally, at least one amine sacrificial agent is included in the mixture. The cementitious mixtures and hardened concretes resulting from the method and fly ash treated with sacrificial agent, or air entrainment agent/sacrificial agent combinations, are also described.
1. A method of reducing or eliminating the effect of fly ash or other combustion ashes on air entrainment in an air-entraining cementitious mixture, comprising the steps of:
forming a cementitious mixture comprising water, cement, fly ash or another combustion ash, and an air entrainment agent, and entraining air in the mixture;
wherein a sacrificial agent is also included in the cementitious mixture in at least an amount necessary to neutralize the detrimental effects of components of said fly ash or other combustion ash on air entrainment activity, the sacrificial agent comprising a material or mixture of materials that, when present in the same cementitious mixture without fly ash or the other combustion ash in said amount, causes less than 2 vol. % additional air content in the cementitious mixture,
wherein the sacrificial agent comprises a compound selected from the group consisting of the structure NR 1 R 2 R 3 , wherein:
R 1 is a substituted or unsubstituted non-alkoxylated C 8-25 alkyl, substituted or unsubstituted non-alkoxylated C 8-25 alkenyl, substituted or unsubstituted non-alkoxylated C 8-25 alkynyl, substituted or unsubstituted C 8-25 alkoxylated alkyl, substituted or unsubstituted C 8-25 alkoxylated alkenyl, or substituted or unsubstituted C 8-25 alkoxylated alkynyl; and
R 2 and R 3 are each independently selected from hydrogen, substituted or unsubstituted C 1-22 alkyl, substituted or unsubstituted C 2-22 alkenyl, or substituted or unsubstituted C 2-22 alkynyl;
wherein R 2 and R 3 are non-alkoxylated.
2. The method of claim 1 , wherein said amount of said sacrificial agent exceeds an amount necessary to neutralize said detrimental effects of said components of said fly ash or other combustion ash.
3. The method of claim 1 , wherein said fly ash or other combustion ash can vary in content of said components from a minimum content to a maximum content according to a source or batch of said fly ash or other combustion ash, and wherein said amount of said at least one sacrificial agent exceeds an amount necessary to neutralize said detrimental effects of said components of said fly ash when present in said maximum content.
4. The method of claim 1 , wherein one or more of R 1 , R 2 , and R 3 is independently an alkoxylated or non-alkoxylated, substituted or unsubstituted fatty acid residue.
5. The method of claim 1 , wherein said sacrificial agent comprises a compound selected from the group consisting of tridodecylamine, dodecyldimethylamine, octadecyldimethylamine, cocoalkyldimethylamines, hydrogenated tallowalkyldimethylamines, oleyldimethylamine, dicocoalkylmethylamine, N-oleyl-1,1′-iminobis-2-propanol, N-tallowalkyl-1,1′-iminobis-2-propanol, and mixtures thereof.
6. The method of claim 5 , wherein said sacrificial agent comprises dodecyldimethylamine.
7. The method of claim 1 , wherein R 2 and R 3 are other than hydrogen.
8. The method of claim 1 , wherein said sacrificial agent comprises a compound having a hydrophobic lipophilic balance rating in the range of 5 to 20.
9. The method of claim 1 , wherein said sacrificial agent comprises a compound for which LogK ow is in the range of −3 to +2.
10. The method of claim 1 , wherein said sacrificial agent comprises a compound for which LogK ow is in the range of −2 to +2.
11. The method of claim 1 , wherein said sacrificial agent is mixed with said air entrainment agent prior to mixing said sacrificial agent and said air entrainment agent with the fly ash or other combustion ash, cement and water.
12. The method of claim 1 , wherein said sacrificial agent is mixed with the fly ash or other combustion ash prior to mixing said sacrificial agent and said fly ash or other combustion ash with said cement, water and said air entrainment agent.
13. The method of claim 1 , wherein said amount of sacrificial agent is in the range of 0.01 to 2.0% by weight of said fly ash or other combustion ash.
14. The method of claim 1 , wherein said amount of sacrificial agent is in the range of 0.1 to 1.0% by weight of said fly ash or other combustion ash.
15. The method of claim 1 , wherein said amount of said sacrificial agent is in the range of 0.001% to 0.25% by weight of the total amount of cementitious material including said fly ash or other combustion ash.
16. The method of claim 1 , wherein said amount of said sacrificial agents is in the range of 0.001% to 0.10% by weight of the total amount of cementitious material including fly ash or other combustion ash.
17. The method of claim 1 , wherein said fly ash or other combustion ash consists essentially of fly ash.
18. The method of claim 1 , wherein the sacrificial agent, when present in the same cementitious mixture without fly ash or the other combustion ash in said amount causes less than 1 vol. % additional air content in the cementitious mixture.
19. The method of claim 2 , wherein the sacrificial agent amount used does not result in a substantial increase in air entrainment compared to providing the sacrificial agent in an amount necessary to neutralize the detrimental effects of components of said fly ash on air entrainment activity.
20. The method of claim 19 , wherein the sacrificial agent causes less than 2 vol. % additional air content in the cementitious mixture without fly ash.
21. The method of claim 1 , wherein said components are carbon content.
22. A method of reducing or eliminating the effect of fly ash on air entrainment in an air-entraining cementitious mixture, comprising the steps of:
forming a cementitious mixture comprising water, cement, fly ash, and an air entrainment agent, and entraining air in the mixture;
wherein a sacrificial agent is also included in the cementitious mixture in at least the amount necessary to neutralize the detrimental effects of the carbon content of said fly ash on air entrainment activity, the sacrificial agent comprising a material or mixture of materials that, when present in the same cementitious mixture without fly ash in said amount causes less than 2 vol. % additional air content in the cementitious mixture,
wherein the sacrificial agent comprises a compound selected from the group consisting of the structure NR 1 R 2 R 3 , wherein:
R 1 is a substituted or unsubstituted non-alkoxylated C 8-25 alkyl, substituted or unsubstituted non-alkoxylated C 8-25 alkenyl, substituted or unsubstituted non-alkoxylated C 8-25 alkynyl, substituted or unsubstituted C 8-25 alkoxylated alkyl, substituted or unsubstituted C 8-25 alkoxylated alkenyl, or substituted or unsubstituted C 8-25 2 alkoxylated alkynyl; and
R 2 and R 3 are each independently selected from hydrogen, substituted or unsubstituted C 1-22 alkyl, substituted or unsubstituted C 2-22 alkenyl, or substituted or unsubstituted C 2-22 alkynyl;
wherein R 2 and R 3 are non-alkoxylated.
23. A method of addressing the variance of carbon content in fly ash used in cementitious compositions to provide a cementitious composition with a substantially constant level of air entrainment, comprising:
forming a cementitious mixture comprising water, cement, fly ash, an air entrainment agent, and a sacrificial agent and entraining air in the mixture, wherein the fly ash has a maximum carbon content; and
selecting a sacrificial agent for the cementitious mixture and an amount of the sacrificial agent such that the amount of the sacrificial agent exceeds the amount necessary to neutralize the maximum carbon content in the fly ash, wherein the sacrificial agent comprises a material or mixture of materials that, when present in the same cementitious mixture without fly ash in said amount causes less than 2 vol. % additional air content in the cementitious mixture, and
wherein the sacrificial agent comprises a compound selected from the group consisting of the structure NR 1 R 2 R 3 , wherein:
R 1 is a substituted or unsubstituted non-alkoxylated C 8-25 alkyl, substituted or unsubstituted non-alkoxylated C 8-25 alkenyl, substituted or unsubstituted non-alkoxylated C 8-25 alkynyl, substituted or unsubstituted C 8-25 alkoxylated alkyl, substituted or unsubstituted C 8-25 alkoxylated alkenyl, or substituted or unsubstituted C 8-25 alkoxylated alkynyl; and
R 2 and R 3 are each independently selected from hydrogen, substituted or unsubstituted C 1-22 alkyl, substituted or unsubstituted C 2-22 alkenyl, or substituted or unsubstituted C 2-22 alkynyl;
wherein R 2 and R 3 are non-alkoxylated.
24. A method of reducing or eliminating the effect of fly ash or other combustion ashes on air entrainment in an air-entraining cementitious mixture, comprising the steps of:
forming a cementitious mixture comprising water, cement, fly ash or another combustion ash, and an air entrainment agent, and entraining air in the mixture;
wherein a sacrificial agent is also included in the cementitious mixture in at least an amount necessary to neutralize the detrimental effects of components of said fly ash or other combustion ash on air entrainment activity, the sacrificial agent comprising a material or mixture of materials that, when present in the same cementitious mixture without fly ash or the other combustion ash in said amount, causes less than 2 vol. % additional air content in the cementitious mixture,
wherein the sacrificial agent comprises a compound selected from the group consisting of the structure NR 1 R 2 R 3 , wherein:
R 1 is a substituted or unsubstituted non-alkoxylated C 8-25 alkyl, substituted or unsubstituted non-alkoxylated C 8-25 alkenyl, substituted or unsubstituted non-alkoxylated C 8-25 alkynyl, substituted or unsubstituted C 8-25 alkoxylated alkyl, substituted or unsubstituted C 8-25 alkoxylated alkenyl, or substituted or unsubstituted C 8-25 alkoxylated alkynyl; and
R 2 and R 3 are each independently selected from hydrogen, unsubstituted C 1-22 alkyl, unsubstituted C 2-22 alkenyl, or unsubstituted C 2-22 alkynyl;
wherein R 2 and R 3 can be optionally alkoxylated and are not both hydrogen.
25. The method of claim 1 , wherein R 1 is a substituted or unsubstituted non-alkoxylated C 10-20 alkyl, substituted or unsubstituted non-alkoxylated C 10-20 alkenyl, substituted or unsubstituted non-alkoxylated C 10-20 alkynyl, substituted or unsubstituted C 10-20 alkoxylated alkyl, substituted or unsubstituted C 10-20 alkoxylated alkenyl, or substituted or unsubstituted C 10-20 alkoxylated alkynyl.
26. The method of claim 22 , wherein R 1 is a substituted or unsubstituted non-alkoxylated C 10-20 alkyl, substituted or unsubstituted non-alkoxylated C 10-20 alkenyl, substituted or unsubstituted non-alkoxylated C 10-20 alkynyl, substituted or unsubstituted C 10-20 alkoxylated alkyl, substituted or unsubstituted C 10-20 alkoxylated alkenyl, or substituted or unsubstituted C 10-20 alkoxylated alkynyl.
27. The method of claim 22 , wherein said sacrificial agent comprises dodecyldimethylamine.
28. The method of claim 23 , wherein R 1 is a substituted or unsubstituted non-alkoxylated C 10-20 alkyl, substituted or unsubstituted non-alkoxylated C 10-20 alkenyl, substituted or unsubstituted non-alkoxylated C 10-20 alkynyl, substituted or unsubstituted C 10-20 alkoxylated alkyl, substituted or unsubstituted C 10-20 alkoxylated alkenyl, or substituted or unsubstituted C 10-20 alkoxylated alkynyl.
29. The method of claim 23 , wherein said sacrificial agent comprises dodecyldimethylamine.
30. The method of claim 24 , wherein R 1 is a substituted or unsubstituted non-alkoxylated C 10-20 alkyl, substituted or unsubstituted non-alkoxylated C 10-20 alkenyl, substituted or unsubstituted non-alkoxylated C 10-20 alkynyl, substituted or unsubstituted C 10-20 alkoxylated alkyl, substituted or unsubstituted C 10-20 alkoxylated alkenyl, or substituted or unsubstituted C 10-20 alkoxylated alkynyl.
31. The method of claim 24 , wherein said sacrificial agent comprises dodecyldimethylamine.