US4059455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of fast-setting bonded aggregate structures
Assignee: Ltv Steel Co Inc
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Filing: 1976-06-17
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Granted: 1977-11-22
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Expires: 1996-06-17
Abstract
Abstract A method of preparing a fast-setting concrete or the like by mixing, with an aggregate containing magnesia, ammonium phosphates in aqueous solution, wherein the composition of the phosphates is about 20% to 58% by weight polyphosphates, balance orthophosphate.
Inventors
- 👤 Robert W. Limes
- 👤 Robert O. Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:23
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/34; C04B35/00; C04B35/01; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/6306; C04B2111/00; C04B2111/00474; C04B2111/0075; C04B2111/72
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
128 words
A method of making a fast-setting bonded aggregate structure, comprising the steps of a. establishing a mixture of i. an aggregate containing at least about 1% magnesia and ii. ammonium phosphate in aqueous solution in an amount equal to at least about one part of P 2 O 5 per 100 parts of said aggregate, the composition of said phosphates being between about 20% and 58% polyphosphates, balance orthophosphate; b. disposing said mixture for setting, prompty after establishment thereof; and c. allowing said mixture to set as thus disposed, while d. continuously maintaining said mixture, throughout the performance of steps (a) and (b) and for at least the first several days of performance of step (c), in a situation of ambient atmospheric temperature not exceeding about 150° F.
Claim 2
Independent Claim
128 words
A method of making a fast-setting bonded aggregate structure, comprising the steps of a. establishing a mixture of i. an aggregate containing at least about 1% magnesia and ii. ammonium phosphate in aqueous solution in an amount equal to at least about one part of P 2 O 5 per 100 parts of said aggregate, the composition of said phosphates being between about 20% and 58% polyphosphates, balance orthophosphate; b. disposing said mixture for setting, prompty after establishment thereof; and c. allowing said mixture to set as thus disposed, while d. continuously maintaining said mixture, throughout the performance of steps (a) and (b) and for at least the first several days of performance of step (c), in a situation of ambient atmospheric temperature not exceeding about 150° F.
Claim 3
Dependent Claim
33 words
A method according to claim 1, wherein the amount of said ammonium phosphates is equal to not more than about 10 parts of P 2 O 5 per 100 parts of said aggregate.
Claim 4
Dependent Claim
32 words
A method according to claim 2, wherein the amount of said ammonium phosphates is equal to at least about 3 parts of P 2 O 5 per 100 parts of said aggregate.
Claim 5
Dependent Claim
22 words
A method according to claim 1, wherein said phosphates are present in said solution in a concentration of at least about 30%.
Claim 6
Independent Claim
129 words
A method of producing a fast-setting concrete structure, comprising the steps of a. establishing a mixture of i. an aggregate containing at least about 10% magnesia and ii. ammonium phosphates in aqueous solution in an amount equal to between about 3 and about 10 parts of P 2 O 5 per 100 parts of said aggregate, the composition of said phosphates being between about 20% and 58% polyphosphates, balance orthophosphate; b. disposing said mixture for setting, promptly after establishment thereof; and c. allowing the mixture to set as thus disposed, while d. continuously maintaining said mixture, throughout the performance of steps (a) and (b) and for at least the first several days of performance of step (c), in a situation of ambient atmospheric temperature not exceeding about 150° F.
Claim 7
Independent Claim
129 words
A method of producing a fast-setting concrete structure, comprising the steps of a. establishing a mixture of i. an aggregate containing at least about 10% magnesia and ii. ammonium phosphates in aqueous solution in an amount equal to between about 3 and about 10 parts of P 2 O 5 per 100 parts of said aggregate, the composition of said phosphates being between about 20% and 58% polyphosphates, balance orthophosphate; b. disposing said mixture for setting, promptly after establishment thereof; and c. allowing the mixture to set as thus disposed, while d. continuously maintaining said mixture, throughout the performance of steps (a) and (b) and for at least the first several days of performance of step (c), in a situation of ambient atmospheric temperature not exceeding about 150° F.
Claim 8
Dependent Claim
40 words
A method according to claim 5, wherein the maintaining step comprises maintaining said mixture in said ambient temperature situation during step (c) for a period sufficient for the mixture to attain a compressive strength of at least about 4,000 p.s.i.
References Cited (Backward Citations)
US3285758A
Cited
US3879209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |