Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing
Reexamination Certificate
2008-07-01
2008-07-01
Wood, Elizabeth D (Department: 1793)
Compositions: coating or plastic
Coating or plastic compositions
Inorganic settable ingredient containing
C106S640000, C106S641000, C106S642000, C106S643000, C106S644000, C106S014050, C106S813000, C106S819000, C106S014210
Reexamination Certificate
active
11078814
ABSTRACT:
The present invention provides methods and compounds for the in situ formation in concrete of chloride sequestering compounds that resist corrosion of metals contained within the concrete. These chloride sequestering compounds may include, but are not limited to, compounds having the formula 3CaO.Fe(2-x)AlxO3.Ca(NO2)2.nH2O and 3CaO.Fe(2-x)AlxO3.Ca(NO3)2.nH2O, where x ranges from about 0 to 1.4 and n ranges from about 8 to 24. In one embodiment, at least one Fe-containing additive is introduced into cement, and at least one anion-containing additive is introduced into mixing water. When the cement and mixing water are combined to create fresh concrete, the additives react to form chloride sequestering compounds. In another embodiment, the additives are introduced or mixed directly into fresh concrete that has already been formed, where they react to create chloride-sequestering compounds. “In situ” formation refers to the creation of a chloride sequestering compound within concrete.
REFERENCES:
patent: 4092109 (1978-05-01), Rosenberg et al.
patent: 4285733 (1981-08-01), Rosenberg et al.
patent: 5049412 (1991-09-01), Miller
patent: 5198082 (1993-03-01), Vennesland et al.
patent: 5435846 (1995-07-01), Tatematsu et al.
patent: 6610138 (2003-08-01), Brown
patent: 6755925 (2004-06-01), Brown
patent: 6810634 (2004-11-01), Brown
patent: 7060128 (2006-06-01), Brown
patent: 7081156 (2006-07-01), Brown
patent: 7101429 (2006-09-01), Brown
patent: 2004/0231565 (2004-11-01), Brown
patent: 2004/0261341 (2004-12-01), Brown
Taylor, Cement Chemistry, 1997, pp. 173-176.
American Concrete Institute, Committee 201 report: Guide to Durable Concrete.
Taylor, Phase Diagrams for Ceramists, Cement Chemistry p. 37, Figs. 43 & 628, American Ceramic Society, Westerville, OH.
Taylor, Cement Chemistry, 1990 p. 28.
Acker Wood Gwen R.
Eckert Seamans Cherin & Mellott , LLC
Wood Elizabeth D
LandOfFree
In situ formation of chloride sequestering compounds does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with In situ formation of chloride sequestering compounds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and In situ formation of chloride sequestering compounds will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3954567