US4453978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing an AE fly ash concrete composition
Assignee: Taiheiyo Cement Corp
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Filing: 1982-09-13
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Granted: 1984-06-12
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Expires: 2002-09-13
Abstract
Abstract This invention relates to a process for producing a concrete mixture containing an AE fly ash cement having substantially no fluctuation of entrained air contained therein regardless of the amount of unburnt carbon in the fly ash which comprises mixing an aggregate, water, and an AE fly concrete composition characterized in that polyoxyethylenesorbitan oleate having 16 to 41 molar ethylene oxide group for mole of said polyoxyethylenesorbitan oleate is used as said AE agent.
Inventors
- 👤 Hirotake Okimura
- 👤 Hideyuki Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:33
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S106/00; Y10S106/01
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
60 words
A process for producing a concrete mixture containing an air-entrained fly ash cement comprising mixing an aggregate, water, and an air-entraining agent with fly ash cement to produce an air-entrained fly ash concrete composition characterized in that polyoxyethylenesorbitan oleate having 23 to 33 moles of ethylene oxide group per mole of said polyoxyethylenesorbitan oleate is used as said air-entraining agent.
Claim 2
Dependent Claim
60 words
A process for producing a concrete mixture containing an air-entrained fly ash cement comprising mixing an aggregate, water, and an air-entraining agent with fly ash cement to produce an air-entrained fly ash concrete composition characterized in that polyoxyethylenesorbitan oleate having 23 to 33 moles of ethylene oxide group per mole of said polyoxyethylenesorbitan oleate is used as said air-entraining agent.
Claim 3
Dependent Claim
48 words
In a concrete mixture containing an air-entrained fly ash cement comprising an aggregate, water and an air-entraining agent and fly ash cement the improvement wherein polyoxyethylenesorbitan oleate having 23 to 33 moles of ethylene oxide group per mole of said polyoxyethylenesorbitan oleate is used as said air-entraining agent.
Claim 4
Dependent Claim
48 words
In a concrete mixture containing an air-entrained fly ash cement comprising an aggregate, water and an air-entraining agent and fly ash cement the improvement wherein polyoxyethylenesorbitan oleate having 23 to 33 moles of ethylene oxide group per mole of said polyoxyethylenesorbitan oleate is used as said air-entraining agent.
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) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |