US3852084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cementitious composition containing activated lime-fly ash mixture
Assignee: CONVERSION SYSTEMS OF PENNSYLVANIA Inc
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Filing: 1972-08-31
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Granted: 1974-12-03
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Expires: 1992-08-31
Abstract
Abstract Improved cementitious composition results from a process comprised of mechanical size reduction and activation of a mixture of lime and fly ash and the addition thereto of fly ash and aggregate, as needed, to make a mix of the desired proportions. A quicker and more complete reaction between the lime and fly ash results from deagglomeration of lime particles caused by interaction with the fly ash and/or by the increased availability of reactant materials due to particle size reduction of both the lime and the fly ash. The mechanical size reduction and activation process may be carried out, for example, in a ball mill or centrifugal impact mill.
Inventors
- 👤 W Webster
- 👤 C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:31
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/18; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S106/00; Y10S106/01; Y10S106/90
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
77 words
A METHOD OF PRODUCING A HARDENABLE, LOAD-BEARING COMPOSITION COMPRISING PLACING, IN A SPACE WHERE A HARDENED COMPOSITION IS REQUIRED, CEMENTITIOUS COMPOSITION CONSISTING OF A MIXTURE OF AT LEAST 65%, BY WEIGHT, UNTREATED FLY ASH, AND NO MORE THAN 35% BY WEIGHT, OF A PRE-MIX, CONSISTING OF FROM 10 TO 96 WEIGHT % HIGHLY ACTIVATED, REDUCED PARTICLE SIZE FLY ASH COMPOSITION, AND 4 TO 90 WEIGHT % DEAGGLOMERTED LIME, THE MAXIMUM PARTICLE SIZE DIMENSION OF WHICH IS GENERALLY
Claim 2
Independent Claim
77 words
A METHOD OF PRODUCING A HARDENABLE, LOAD-BEARING COMPOSITION COMPRISING PLACING, IN A SPACE WHERE A HARDENED COMPOSITION IS REQUIRED, CEMENTITIOUS COMPOSITION CONSISTING OF A MIXTURE OF AT LEAST 65%, BY WEIGHT, UNTREATED FLY ASH, AND NO MORE THAN 35% BY WEIGHT, OF A PRE-MIX, CONSISTING OF FROM 10 TO 96 WEIGHT % HIGHLY ACTIVATED, REDUCED PARTICLE SIZE FLY ASH COMPOSITION, AND 4 TO 90 WEIGHT % DEAGGLOMERTED LIME, THE MAXIMUM PARTICLE SIZE DIMENSION OF WHICH IS GENERALLY
Claim 3
Dependent Claim
19 words
A method, as recited in claim 1, wherein said cementitious composition is placed in combination with an aggregate material.
Claim 4
Dependent Claim
71 words
A cementitious composition consisting of at least 65%, by weight, untreated fly ash and no more than 35%, by weight, of a pre-mix consisting of from 10 to 96 weight % highly activated, reduced particle size fly ash composition, and 4 to 90 weight % deagglomerated lime, the maximum particle size dimension of which is generally below 35 microns, said lime constituting from 1 to 40 weight % of said composition.
Claim 5
Dependent Claim
71 words
A cementitious composition consisting of at least 65%, by weight, untreated fly ash and no more than 35%, by weight, of a pre-mix consisting of from 10 to 96 weight % highly activated, reduced particle size fly ash composition, and 4 to 90 weight % deagglomerated lime, the maximum particle size dimension of which is generally below 35 microns, said lime constituting from 1 to 40 weight % of said composition.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |