US3960580A
Expired / Lapsed
US
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Magnesium phosphate concrete compositions
Assignee: WR Grace and Co
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Filing: 1974-11-21
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Granted: 1976-06-01
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Expires: 1994-11-21
Abstract
Abstract The setting time of quick-setting magnesium oxide-ammonium phosphate concretes is extended by the addition of specified oxy-boron compounds such as sodium borate. The incorporation of the oxy-boron compound in the composition has also been found to increase the extended or overall compressive strength of the composition.
Inventors
- 👤 Robert F. Stierli
- 👤 Clayton C. Tarver
- 👤 James M. Gaidis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:31
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/34; C04B28/30; C04B2103/00; C04B2103/20; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
106 words
A dry, quick setting cementitious composition capable of setting to a hardened mass in less than one-half hour at 70°F following the addition of water alone thereto, and containing magnesium oxide and from about 25 to about 200 weight % based on said oxide of a dry, solid monoammonium phosphate component reactive therewith as the essential binding components, and, as a retarder of the normal quick-setting time of the composition, from about 0.1 to about 20 percent by weight, based on the said binding components, of an oxy-boron compound selected from the group consisting of oxyacids of boron, salts or esters thereof, or mixtures of such.
Claim 2
Dependent Claim
106 words
A dry, quick setting cementitious composition capable of setting to a hardened mass in less than one-half hour at 70°F following the addition of water alone thereto, and containing magnesium oxide and from about 25 to about 200 weight % based on said oxide of a dry, solid monoammonium phosphate component reactive therewith as the essential binding components, and, as a retarder of the normal quick-setting time of the composition, from about 0.1 to about 20 percent by weight, based on the said binding components, of an oxy-boron compound selected from the group consisting of oxyacids of boron, salts or esters thereof, or mixtures of such.
Claim 3
Dependent Claim
111 words
A dry, solid, quick-setting cementitious composition capable of setting to a hardened mass in less than one-half hour at 70°F following the addition thereto of water alone and comprising a mixture of magnesium oxide, from about 25 to about 200% by weight based on said oxide of a solid monoammonium phosphate component reactive therewith, from about 0.1 to about 20% by weight, based upon the combined weight of said magnesium oxide and reactive phosphate of an oxy-boron component selected from the group consisting of oxyacids of boron, salts or esters thereof, or mixtures of such, and up to about 80% by weight of a filler component based on the total composition.
Claim 4
Dependent Claim
111 words
A dry, solid, quick-setting cementitious composition capable of setting to a hardened mass in less than one-half hour at 70°F following the addition thereto of water alone and comprising a mixture of magnesium oxide, from about 25 to about 200% by weight based on said oxide of a solid monoammonium phosphate component reactive therewith, from about 0.1 to about 20% by weight, based upon the combined weight of said magnesium oxide and reactive phosphate of an oxy-boron component selected from the group consisting of oxyacids of boron, salts or esters thereof, or mixtures of such, and up to about 80% by weight of a filler component based on the total composition.
Claim 5
Dependent Claim
10 words
The composition of claim 2 wherein the filler is dolomite.
Claim 6
Dependent Claim
11 words
The composition of claim 2 wherein the filler is fly ash.
Claim 7
Dependent Claim
10 words
The composition of claim 2 wherein the filler is sand.
Claim 8
Dependent Claim
19 words
The composition of claim 5 wherein the amount of said oxy-boron component ranges from about 0.1 to about 6%.
Claim 9
Dependent Claim
124 words
A dry, solid, quick-setting, cementitious composition capable of setting in less than one half hour at 70°F. and developing a high compressive strength in a few hours upon the addition thereto of water alone, said composition comprising a mixture of magnesium oxide, from about 25 to about 200% weight, based on said magnesium oxide, of a dry solid monoammonium phosphate component reactive therewith, from about 0.1 to about 20% weight, based upon the combined weight of said magnesium oxide and said phosphate, of an oxy-boron set-retarding component selected from the group consisting of oxyacids of boron, salts or esters thereof, or mixtures of such and from about 1 to about 80%, based on the total composition, of a filler component comprised of fly ash.
Claim 10
Dependent Claim
124 words
A dry, solid, quick-setting, cementitious composition capable of setting in less than one half hour at 70°F. and developing a high compressive strength in a few hours upon the addition thereto of water alone, said composition comprising a mixture of magnesium oxide, from about 25 to about 200% weight, based on said magnesium oxide, of a dry solid monoammonium phosphate component reactive therewith, from about 0.1 to about 20% weight, based upon the combined weight of said magnesium oxide and said phosphate, of an oxy-boron set-retarding component selected from the group consisting of oxyacids of boron, salts or esters thereof, or mixtures of such and from about 1 to about 80%, based on the total composition, of a filler component comprised of fly ash.
Claim 11
Dependent Claim
30 words
The composition of claim 7 wherein said phosphate component comprises a mixture of monoammonium phosphate and another solid phosphate selected from the group consisting of diammonium phosphate, and sodium pyrophosphate.
Claim 12
Dependent Claim
16 words
The composition of claim 7 wherein said filler comprises a mixture of fly ash and sand.
Claim 13
Dependent Claim
24 words
The composition of claim 7 wherein said oxy-boron set-retarding component is selected from the group consisting of borax, boric acid, trimethylborate and ammonium pentaborate.
Claim 14
Dependent Claim
114 words
An improved cementitious composition having the ability to set to a hardened mass in less than one-half hour at 70°F following the addition thereto of water through the reaction of an ammonium phosphate component and magnesium oxide reactive therewith, said composition containing magnesium oxide and from about 25 to about 200 weight % based on said magnesium oxide of an ammonium phosphate component, the composition further containing as a retarder of such setting reaction from about 0.1 to about 20 weight %, based upon the weight of said phosphate and said oxide components, of an oxy-boron compound selected from the group consisting of oxyacids of boron, salts or esters thereof, or mixtures of such.
Claim 15
Dependent Claim
114 words
An improved cementitious composition having the ability to set to a hardened mass in less than one-half hour at 70°F following the addition thereto of water through the reaction of an ammonium phosphate component and magnesium oxide reactive therewith, said composition containing magnesium oxide and from about 25 to about 200 weight % based on said magnesium oxide of an ammonium phosphate component, the composition further containing as a retarder of such setting reaction from about 0.1 to about 20 weight %, based upon the weight of said phosphate and said oxide components, of an oxy-boron compound selected from the group consisting of oxyacids of boron, salts or esters thereof, or mixtures of such.
Claim 16
Dependent Claim
21 words
The improved composition of claim 11 wherein the ammonium phosphate component comprises an aqueous solution of a mixture containing ammonium polyphosphates.
Claim 17
Dependent Claim
19 words
The improved composition of claim 11 wherein the ammonium phosphate component is monoammonium phosphate or a mixture containing such.
Claim 18
Dependent Claim
11 words
The improved composition of claim 11 additionally containing an aggregate material.
Claim 19
Dependent Claim
22 words
The improved composition of claim 11 wherein said reactive phosphate comprises an aqueous solution of ammonium phosphate containing orthophosphate, pyrophosphate and polyphosphate.
Claim 20
Dependent Claim
36 words
The improved composition of claim 15 wherein said solution comprises a mixture containing about 35 to 40% orthophosphate, about 45 to 50% pyrophosphate, about 9 to 11% tripolyphosphate and about 2 to 5% of higher polyphosphate.
Claim 21
Dependent Claim
12 words
The improved composition of claim 11 wherein said oxy-boron compound is borax.
Claim 22
Dependent Claim
13 words
The improved composition of claim 11 wherein said oxy-boron compound is boric acid.
Claim 23
Dependent Claim
12 words
The improved composition of claim 11 wherein said oxy-boron compound is trimethylborate.
Claim 24
Dependent Claim
13 words
The improved composition of claim 11 wherein said oxy-boron compound is ammonium pentaborate.
References Cited (Backward Citations)
US3241987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |