US4018619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly activated mixtures for constructing load bearing surfaces and method of making the same
Assignee: CONVERSION SYSTEMS OF PENNSYLVANIA Inc
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Filing: 1976-01-22
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Granted: 1977-04-19
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Expires: 1996-01-22
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
- 👤 William C. Webster
- 👤 Charles L. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:12
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/18; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S106/00; Y10S106/01
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
101 words
A method of producing a more reactive lime-fly ash cementitious composition, said method comprising mechanically treating a hydrated lime and fly ash pre-mixture, consisting of 4-90 weight % hydrated lime in the presence of glassy fly ash particles occurring therein, said mechanical treating comprising a process wherein said glassy fly ash particles are caused to interact mechanically with said hydrated lime to reduce the particle size of and to deagglomerate said hydrated lime, then adding to said pre-mix unactivated fly ash in an amount such that the proportion of the pre-mix in the total mix does not exceed 35% by weight.
Claim 2
Independent Claim
101 words
A method of producing a more reactive lime-fly ash cementitious composition, said method comprising mechanically treating a hydrated lime and fly ash pre-mixture, consisting of 4-90 weight % hydrated lime in the presence of glassy fly ash particles occurring therein, said mechanical treating comprising a process wherein said glassy fly ash particles are caused to interact mechanically with said hydrated lime to reduce the particle size of and to deagglomerate said hydrated lime, then adding to said pre-mix unactivated fly ash in an amount such that the proportion of the pre-mix in the total mix does not exceed 35% by weight.
Claim 3
Dependent Claim
17 words
A method, as recited in claim 1, wherein said mechanical treating is effected by a ball mill.
Claim 4
Dependent Claim
19 words
A method, as recited in claim 1, wherein said mechanical treating is effected by a high intensity centrifugal impeller.
Claim 5
Dependent Claim
18 words
A method, as recited in claim 1, wherein said mechanical treating is effected by a jet mixing device.
Claim 6
Dependent Claim
20 words
A method, as recited in claim 1, wherein said mechanical treating is effected by a twin-cylindrical shell, "V" shaped blender.
References Cited (Backward Citations)
US3066031A
Cited
US3852084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |