Mold Inhibiting Admixture for a Cementitious Material

Abstract

An admixture for a cementitious mixture to inhibit mold growth on the surface of a cementitious material, such as a concrete block or a revetment. The admixture includes a water soluble alkali or alkaline earth salt of an alkyl, alkenyl, aryl, alkaryl, or alkenaryl carboxylic acid.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention may be more completely understood in consideration of the following detailed description of various embodiments in connection with the accompanying drawings, in which:

FIG. 1 is a perspective view of an illustrative cementitious material illustrated as a cinder block; and

FIG. 2 is a perspective view of another illustrative cementitious material illustrated as a revetment.

Claims

1. A cementitious material having mold inhibiting properties, the cementitious material comprising: a cementitious mixture; andan admixture including a water soluble alkali, alkaline earth or ammonium salt derived from a carboxylic acid, the carboxylic acid having three or more carbon atoms.

2. The cementitious material of claim 1, wherein the carboxylic acid is propionic acid.

3. The cementitious material of claim 1, wherein the carboxylic acid is butyric acid.

4. The cementitious material of claim 1, wherein the carboxylic acid is isobutyric acid.

5. The cementitious material of claim 1, wherein the carboxylic acid is valeric acid.

6. The cementitious material of claim 1, wherein the carboxylic acid is isovaleric acid.

7. The cementitious material of claim 1, wherein the carboxylic acid is benzoic acid.

8. The cementitious material of claim 1, wherein the carboxylic acid is phenylacetic acid.

9. The cementitious material of claim 1, wherein the carboxylic acid is acetylsalicylic acid.

10. The cementitious material of claim 1, wherein the carboxylic acid is levulinic acid.

11. The cementitious material of claim 1, wherein the alkali or alkaline earth salt is a sodium salt.

12. The cementitious material of claim 1, wherein the alkali or alkaline earth salt is a potassium salt.

13. The cementitious material of claim 1, wherein the alkali or alkaline earth salt is a magnesium salt.

14. The cementitious material of claim 1, wherein the alkali or alkaline earth salt is a lithium salt.

15. The cementitious material of claim 1, wherein the alkali or alkaline earth salt is a calcium salt.

16. The cementitious material of claim 1, wherein the alkaline earth salt is an ammonium salt.

17. The cementitious material of claim 15, wherein the calcium salt is calcium propionate.

18. The cementitious material of claim 1, wherein the cementitious material is a cementitious building material.

19. The cementitious material of claim 18, wherein the cementitious building material is a cement block.

20. The cementitious material of claim 18, wherein the cementitious building material is a revetment.

21. The cementitious material of claim 18, wherein the cementitious material is pavement or structural concrete.

22. A cementitious material having mold inhibiting properties, the cementitious material comprising: a cementitious mixture; andan admixture including a means for inhibiting mold growth on the surface of the cementitious material.

23. The cementitious material of claim 22, wherein the means for inhibiting mold growth includes a solution of an alkali salt.

24. The cementitious material of claim 24, wherein the solution of an alkali salt is derived from a carboxylic acid.

25. The cementitious material of claim 25, wherein the carboxylic acid includes three or more carbon atoms.

26. The cementitious material of claim 25, wherein the carboxylic acid is selected from the group consisting of propionic acid, butyric acid, isobutyric acid, isobutyric acid, valeric acid, isovaleric acid, benzoic acid, phenylacetic acid, acetylsalicylic acid, and levulinic acid.

27. The cementitious material of claim 22, wherein the means for inhibiting mold growth includes a solution of an alkaline earth salt.

28. The cementitious material of claim 27, wherein the solution of an alkaline earth salt is derived from a carboxylic acid.

29. The cementitious material of claim 28, wherein the carboxylic acid includes three or more carbon atoms.

30. The cementitious material of claim 29, wherein the carboxylic acid is selected from the group consisting of propionic acid, butyric acid, isobutyric acid, isobutyric acid, valeric acid, isovaleric acid, benzoic acid, phenylacetic acid, acetylsalicylic acid, and levulinic acid.

31. The cementitious material of claim 22, wherein the means for inhibiting mold growth includes a solution of an ammonium salt.

32. The cementitious material of claim 31, wherein the solution of an ammonium salt is derived from a carboxylic acid.

33. The cementitious material of claim 28, wherein the carboxylic acid includes three or more carbon atoms.

34. The cementitious material of claim 29, wherein the carboxylic acid is selected from the group consisting of propionic acid, butyric acid, isobutyric acid, isobutyric acid, valeric acid, isovaleric acid, benzoic acid, phenylacetic acid, acetylsalicylic acid, and levulinic acid.

35. A cementitious material having mold inhibiting properties, the cementitious material comprising: a cementitious mixture including an effective amount of a solution of an alkali, alkaline earth or ammonium salt of an alkyl, alkenyl, aryl, alkaryl, or alkenaryl carboxylic acid to inhibit mold growth.

36. The cementitious material of claim 35, wherein the carboxylic acid is selected from the group consisting of propionic acid, butyric acid, isobutyric acid, isobutyric acid, valeric acid, isovaleric acid, benzoic acid, phenylacetic acid, acetylsalicylic acid, and levulinic acid.

37. The cementitious material of claim 35, wherein the alkali, alkaline earth or ammonium salt is selected from the group consisting of a sodium salt, a potassium salt, a magnesium salt, a lithium salt, a calcium salt and an ammonium salt.

38. The cementitious material of claim 35, wherein the alkali, alkaline earth or ammonium salt is calcium propionate.

39. A method of inhibiting mold growth on a cementitious material, the method comprising the steps of: providing a cementitious mixture;adding an admixture to the cementitious mixture, wherein the admixture includes a water soluble alkali, alkaline earth or ammonium salt derived from a carboxylic acid, the carboxylic acid having three or more carbon atoms; andforming a cementitious material with the cementitious mixture.

40. The method of claim 39, wherein the carboxylic acid is propionic acid.

41. The method of claim 39, wherein the carboxylic acid is butyric acid.

42. The method of claim 39, wherein the carboxylic acid is isobutyric acid.

43. The method of claim 39, wherein the carboxylic acid is valeric acid.

44. The method of claim 39, wherein the carboxylic acid is isovaleric acid.

45. The method of claim 39, wherein the carboxylic acid is benzoic acid.

46. The method of claim 39, wherein the carboxylic acid is phenylacetic acid.

47. The method of claim 39, wherein the carboxylic acid is acetylsalicylic acid.

48. The method of claim 39, wherein the carboxylic acid is levulinic acid.

49. The method of claim 39, wherein the alkali, alkaline earth or ammonium salt is a sodium salt.

50. The method of claim 39, wherein the alkali, alkaline earth or ammonium salt is a potassium salt.

51. The method of claim 39, wherein the alkali, alkaline earth or ammonium salt is a magnesium salt.

52. The method of claim 39, wherein the alkali, alkaline earth or ammonium salt is a lithium salt.

53. The method of claim 39, wherein the alkali, alkaline earth or ammonium salt is a calcium salt.

54. The method of claim 39, wherein the alkali, alkaline earth or ammonium salt is an ammonium salt.

55. The method of claim 39, wherein the calcium salt is calcium propionate.

56. The method of claim 39, wherein the cementitious material is a cementitious building material.

57. The method of claim 39, wherein the cementitious building material is a concrete block.

58. The method of claim 39, wherein the cementitious building material is a revetment.

59. The method of claim 39, wherein the cementitious material is a cementitious pavement or structural concrete.

60. A method of inhibiting mold growth on a cementitious material, the method comprising the steps of: providing a cementitious mixture;adding an admixture including a means for inhibiting mold growth on the surface of the cementitious mixture; andforming a cementitious material with the cementitious mixture.

61. The method of claim 60, wherein the means for inhibiting mold growth includes a solution of an alkali salt.

62. The method of claim 61, wherein the solution of an alkali salt is derived from a carboxylic acid.

63. The method of claim 62, wherein the carboxylic acid includes three or more carbon atoms.

64. The method of claim 63, wherein the carboxylic acid is selected from the group consisting of propionic acid, butyric acid, isobutyric acid, isobutyric acid, valeric acid, isovaleric acid, benzoic acid, phenylacetic acid, acetylsalicylic acid, and levulinic acid.

65. The method of claim 60, wherein the means for inhibiting mold growth includes a solution of an alkaline earth salt.

66. The method of claim 65, wherein the solution of an alkaline earth salt is derived from a carboxylic acid.

67. The method of claim 66, wherein the carboxylic acid includes three or more carbon atoms.

68. The method of claim 67, wherein the carboxylic acid is selected from the group consisting of propionic acid, butyric acid, isobutyric acid, isobutyric acid, valeric acid, isovaleric acid, benzoic acid, phenylacetic acid, acetylsalicylic acid, and levulinic acid.

69. The method of claim 60, wherein the means for inhibiting mold growth includes a solution of an ammonium salt.

70. The method of claim 61, wherein the solution of an ammonium salt is derived from a carboxylic acid.

71. The method of claim 62, wherein the carboxylic acid includes three or more carbon atoms.

72. The method of claim 63, wherein the carboxylic acid is selected from the group consisting of propionic acid, butyric acid, isobutyric acid, isobutyric acid, valeric acid, isovaleric acid, benzoic acid, phenylacetic acid, acetylsalicylic acid, and levulinic acid.

73. A method of inhibiting mold growth on a cementitious material, the method comprising the steps of: providing a cementitious mixture;adding an effective amount of a solution of an alkali, alkaline earth or ammonium salt of an alkyl, alkenyl, aryl, alkaryl, or alkenaryl carboxylic acid to inhibit mold growth to the cementitious mixture; andforming a cementitious material with the cementitious mixture.

74. The method of claim 73, wherein the carboxylic acid is selected from the group consisting of propionic acid, butyric acid, isobutyric acid, isobutyric acid, valeric acid, isovaleric acid, benzoic acid, phenylacetic acid, acetylsalicylic acid, and levulinic acid.

75. The method of claim 73, wherein the alkali, alkaline earth or ammonium salt is selected from the group consisting of a sodium salt, a potassium salt, a magnesium salt, a lithium salt, a calcium salt and an ammonium salt.

76. The method of claim 73, wherein the alkali, alkaline earth or ammonium salt is calcium propionate.