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US3634115A
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Sulfopozzolanically active fly ash and composition
Assignee: CONVERSION SYSTEMS OF PENNSYLVANIA Inc
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Filing: 1968-12-03
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Granted: 1972-01-11
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Expires: 1988-12-03
Abstract
Abstract A new bituminous coal fly ash is sulfopozzolanically reactive and contains combined sulfate in stated proportions relative to alkaline earth metal oxide content. Load-supporting compositions of this fly ash combined with aggregate, and a method of applying the new fly ash to an existing surface.
Inventors
- 👤 Leonard John Minnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:27
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/24; C04B7/26; C04B18/00; C04B18/04; C04B18/06; C04B18/08; E; E01; E01C; E01C3/00; E01C3/003; E01C3/04; Y; Y02; Y02P; Y02P40/00; Y02P40/10; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S106/00; Y10S106/01; Y10S106/90
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
38 words
The fly ash of claim 1, wherein the fly ash contains an alkali earth metal selected from the group consisting of calcium and magnesium and mixtures thereof, and the sulfate is chemically combined with the alkali earth metal.
Claim 2
Dependent Claim
16 words
The fly ash of claim 2, wherein the sulfate is present as alkali earth metal sulfoaluminate.
Claim 3
Dependent Claim
27 words
The fly ash of claim 2, wherein the sulfate is present as a triple salt including alkali earth metal oxide, Al2O3 and CaSO4 bonded to one another.
Claim 4
Dependent Claim
40 words
The fly ash of claim 1, wherein the sulfate is present in a form which reacts with water to form 3MO.Al2O3.3MSO4.30-32H2O, where M is an alkali earth metal selected from the group consisting of calcium and magnesium and mixtures thereof.
Claim 5
Dependent Claim
40 words
The fly ash of claim 1, where the sulfate is present in a form which reacts with water to form 3MO.Al2O3.MSO4.12-13H2O, where M is an alkali earth metal selected from the group consisting of calcium and magnesium and mixtures thereof.
Claim 6
Dependent Claim
63 words
A material suitable for forming a stabilized load-supporting composition consisting essentially of about 8 to about 95 percent by weight of highly active fly ash, and about 5 to about 92 percent by weight of aggregate, said fly ash containing about 5 to about 50 percent by weight of a combined sulfate, expressed as SO3, based upon the weight of the fly ash.
Claim 7
Dependent Claim
38 words
the material defined in claim 7, wherein the Fly ash contains an alkali earth metal selected from the group consisting of calcium and magnesium and mixtures thereof, and the sulfate is chemically combined with the alkali earth metal.
Claim 8
Dependent Claim
16 words
The material defined in claim 8, wherein the sulfate is present as alkali earth metal sulfoaluminate.
Claim 9
Dependent Claim
27 words
The material defined in claim 8, wherein the sulfate is present as a triple salt including alkali earth metal oxide, Al2O3, and CaSO4 bonded to one another.
Claim 10
Dependent Claim
40 words
The material defined in claim 8, wherein the sulfate is present in a form which reacts with water to form 3MO.Al2O3.3MSO4.30-32H2O, where M is an alkali earth metal selected from the group consisting of calcium and magnesium and mixtures thereof.
Claim 11
Dependent Claim
41 words
The material defined in claim 8, wherein the sulfate is present in a form which reacts with water to form 3MO.A12O3.MSO4.12-13 H2O, where M is an alkali earth metal selected from the group consisting of calcium and magnesium and mixtures thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |