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US 4,059,455 AGranted
Production of fast-setting bonded aggregate structures
AssigneeRepublic Steel Corporation
InventorsRobert W. Limes, Robert O. Russell
Life of this patent
Estimating the term…
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.
Claims6
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.sub.2 O.sub.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.degree. F.
4 more elements
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.sub.2 O.sub.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.degree. F.
4 more elements
Dependencies are inferred from the claim text.