US4227932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single component potassium silicate cement for dry gunning
Assignee: Arkema Inc
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Filing: 1979-02-21
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Granted: 1980-10-14
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Expires: 1999-02-21
Abstract
Abstract A pulverulent single component potassium silicate cement composition is disclosed and claimed which is capable of being installed by the dry gunite method utilizing water addition at the nozzle to produce a dense continuous quick setting acid resistant cement on horizontal, sloping, vertical and overhead surfaces. The cement composition comprises a special hydrated potassium silicate water glass powder, an acid releasing hardener, and a filler such as silica sand. The composition of the potassium silicate and the proportions of the ingredients must be closely regulated to obtain satisfactory cements. The potassium silicate cement opens a new era of silicate monolithic linings which provide maximum resistance to acid environments other than hydrofluoric acid.
Inventors
- 👤 George R. Leah
- 👤 Robert R. Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:48
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C04B2111/00; C04B2111/00474; C04B2111/00482
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
156 words
A single component potassium silicate cement composition capable of being dry gunited by mixing with water in the nozzle of a concrete gunning machine to produce a quick setting acid-resistant cement comprising the following pulverulent ingredients expressed as precent by weight: (a) Potassium silicate having an SiO 2 /K 2 O weight ratio within the range of about 1.8 to 2.5 of SiO 2 to 1 of K 2 O, and a water content within the range of 10 to 25%--8 to 24% (b) At least one acid releasing hardener--1.3 to 10% (c) At least one acid resistant inorganic filler 66 to 90% (d) At least one surfactant--0.05 to 2% (e) At least one coating oil--0.1 to 2%, the said acid releasing hardener having a lower limiting weight ratio with respect to the potassium silicate of 1 to 6 and an upper limiting weight ratio with respect to the said potassium silicate of 1 to 2.5.
Claim 2
Dependent Claim
156 words
A single component potassium silicate cement composition capable of being dry gunited by mixing with water in the nozzle of a concrete gunning machine to produce a quick setting acid-resistant cement comprising the following pulverulent ingredients expressed as precent by weight: (a) Potassium silicate having an SiO 2 /K 2 O weight ratio within the range of about 1.8 to 2.5 of SiO 2 to 1 of K 2 O, and a water content within the range of 10 to 25%--8 to 24% (b) At least one acid releasing hardener--1.3 to 10% (c) At least one acid resistant inorganic filler 66 to 90% (d) At least one surfactant--0.05 to 2% (e) At least one coating oil--0.1 to 2%, the said acid releasing hardener having a lower limiting weight ratio with respect to the potassium silicate of 1 to 6 and an upper limiting weight ratio with respect to the said potassium silicate of 1 to 2.5.
Claim 3
Dependent Claim
16 words
The cement composition of claim 1 in which the acid releasing hardener is condensed aluminum phosphate.
Claim 4
Dependent Claim
27 words
The cement composition of claim 2 in which the acid releasing hardener is used at a weight ratio of 1 to 4 with respect to potassium silicate.
Claim 5
Dependent Claim
17 words
The composition of claim 1 in which the acid resistant inorganic filler consists of graded silica sands.
Claim 6
Dependent Claim
20 words
The composition of claim 1 in which the acid resistant inorganic filler contains from about 2 to 10% of clay.
Claim 7
Dependent Claim
21 words
The composition of claim 1 in which the potassium silicate has a water content within the range of 10 to 20%.
Claim 8
Dependent Claim
21 words
The composition of claim 1 in which the inert inorganic filler is present within the range of about 70 to 80%.
Claim 9
Dependent Claim
13 words
The composition of claim 1 in which the coating oil is mineral oil.
Claim 10
Dependent Claim
144 words
A single component potassium silicate cement composition capable of being dry gunited by mixing with water in the nozzle of a concrete gunning machine to produce a quick setting cement comprising the following pulverulent ingredients expressed as percent by weight: (a) Potassium silicate having an SiO 2 /K 2 O weight ratio within the range of about 1.8 to 2.5 of SiO 2 to 1 of K 2 O, and a water content within the range of 10 to 25%--8 to 24% (b) At least one acid releasing hardener--1.3 to 10% (c) At lease one inorganic filler--66 to 90% (d) At least one surfactant--0.05 to 2%, the said acid releasing hardener having a lower limiting weight ratio with respect to the potassium silicate of 1 to 6 and an upper limiting weight ratio with respect to the said potassium silicate of 1 to 2.5.
Claim 11
Dependent Claim
144 words
A single component potassium silicate cement composition capable of being dry gunited by mixing with water in the nozzle of a concrete gunning machine to produce a quick setting cement comprising the following pulverulent ingredients expressed as percent by weight: (a) Potassium silicate having an SiO 2 /K 2 O weight ratio within the range of about 1.8 to 2.5 of SiO 2 to 1 of K 2 O, and a water content within the range of 10 to 25%--8 to 24% (b) At least one acid releasing hardener--1.3 to 10% (c) At lease one inorganic filler--66 to 90% (d) At least one surfactant--0.05 to 2%, the said acid releasing hardener having a lower limiting weight ratio with respect to the potassium silicate of 1 to 6 and an upper limiting weight ratio with respect to the said potassium silicate of 1 to 2.5.
Claim 12
Dependent Claim
134 words
A process for applying a single component acid resistant quick-setting cement in thicknesses which may exceed 1" to horizontal, sloping, vertical and overhead surfaces comprising placing the single component potassium silicate cement of claim 1 in the charging chamber of a dry gunite machine, pressurizing the said charging chamber by means of compressed air, metering the said potassium silicate cement from the charging chamber into a material supply hose leading to the gun nozzle, introducing a water spray from a pressurized water line into the gun nozzle to mix the water with the said cement, directing the mixture of the said potassium silicate cement and water through a hose to selected surfaces which may be horizontal, sloping, vertical and overhead and allowing the cement to set-up on the surfaces for at least 10 minutes.
Claim 13
Dependent Claim
79 words
A single component potassium silicate cement composition capable of being dry gunited by mixing with water in the nozzle of a concrete gunning machine to produce a quick setting acid-resistant cement comprising the following pulverulent ingredients expressed as percent by weight: (a) Potassium silicate having an SiO 2 /K 2 O weight ratio of 2 and a water content of about 16% by weight--16.0% (b) Condensed aluminum phosphate hardener--4.0% (c) Silica sands--76.4% (d) Clay--3.2% (e) Surfactant--0.1% (f) Mineral Oil--0.3%.
Claim 14
Dependent Claim
79 words
A single component potassium silicate cement composition capable of being dry gunited by mixing with water in the nozzle of a concrete gunning machine to produce a quick setting acid-resistant cement comprising the following pulverulent ingredients expressed as percent by weight: (a) Potassium silicate having an SiO 2 /K 2 O weight ratio of 2 and a water content of about 16% by weight--16.0% (b) Condensed aluminum phosphate hardener--4.0% (c) Silica sands--76.4% (d) Clay--3.2% (e) Surfactant--0.1% (f) Mineral Oil--0.3%.
References Cited (Backward Citations)
US3445257A
Cited
US3813253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |