US4397801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of cementitious compositions and aggregate derivatives from said compositions, and cementitious compositions and aggregates produced thereby
Assignee: Individual
•
Filing: 1981-02-09
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Granted: 1983-08-09
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Expires: 2001-02-09
Abstract
Abstract The present invention relates to a method for preparing synthetic shaped cementitious compositions having high quality even without the addition of high energy binders, such as portland cement, through the use of the spent residue from a fluidized combustion bed of the type wherein limestone particles are suspended in a fluidized medium and sulfur oxides are captured, and pulverized coal fly ash.
Inventors
- 👤 L. John Minnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:13
CPC Classifications
C; C04; C04B; C04B18/00; C04B18/04; C04B18/06; C04B18/08; C04B18/084; C04B28/00; C04B28/02; C04B28/021; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
119 words
In a method of preparing synthetic shaped cementitious compositions having high quality even without the addition of high energy binders such as portland cement, the steps which comprise: (a) collecting and admixing the spent residue from a fluidized combustion bed of the type wherein limestone particles are suspended in a fluidized medium and sulfur oxides are captured and pulverized coal fly ash, (b) adding controlled amounts of water to said residue-fly ash mixture, (c) compacting and forming the mixture produced as a result of step (b) to the desired shape, and (d) curing the shaped article, whereby the article, even if prepared without any such high energy binder, has a Los Angeles Rattler abrasion resistance of less than 50%.
Claim 2
Dependent Claim
119 words
In a method of preparing synthetic shaped cementitious compositions having high quality even without the addition of high energy binders such as portland cement, the steps which comprise: (a) collecting and admixing the spent residue from a fluidized combustion bed of the type wherein limestone particles are suspended in a fluidized medium and sulfur oxides are captured and pulverized coal fly ash, (b) adding controlled amounts of water to said residue-fly ash mixture, (c) compacting and forming the mixture produced as a result of step (b) to the desired shape, and (d) curing the shaped article, whereby the article, even if prepared without any such high energy binder, has a Los Angeles Rattler abrasion resistance of less than 50%.
Claim 3
Dependent Claim
27 words
The method as defined in claim 1 including adding in step (a) a material selected from the group consisting of magnesium carbonate ethyl silicate and magnesium fluorosilicate.
Claim 4
Dependent Claim
16 words
The method as defined in claim 1 further comprising crushing said shaped article into aggregate pieces.
Claim 5
Dependent Claim
12 words
The method as defined in claim 1 wherein step (c) comprises briquetting.
Claim 6
Dependent Claim
27 words
Method as defined in claim 1 wherein said step (b) comprises adding from 10-30 weight percent water to said residue based upon the weight of said residue.
Claim 7
Dependent Claim
26 words
Method as defined in claim 1 wherein said step (b) comprises mixing the mixture of water and spent residue for a period of about 15 minutes.
Claim 8
Dependent Claim
41 words
Method as defined in claim 5 wherein the water content of the fly ash and residue mixture is controlled to within the range of about 9 to 19% by weight, based upon the weight of said residue and said fly ash.
Claim 9
Dependent Claim
28 words
Method as defined in claim 1 further comprising the step of allowing the mixture of residue and water to cool prior to the performance of said step (c).
Claim 10
Dependent Claim
17 words
Method as defined in claim 1 further comprising adding an aggregate material to the residue-fly ash mixture.
Claim 11
Dependent Claim
30 words
A method as defined in claim 1 comprising adding cement to the moist mixture of fly ash and residue and compacting the mixture into the shape of a masonry block.
Claim 12
Dependent Claim
21 words
Method as defined in claim 1 wherein said curing is at ambient temperature for a period of from about 7-28 days.
Claim 13
Dependent Claim
27 words
Method as defined in claim 1 wherein fly ash and residue are provided in amounts of about 10-50% by weight fly ash per 90-50% by weight residue.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |