US4046583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing expansive and high strength cementitious pastes, mortars and concretes
Assignee: Sandoz AG
•
Filing: 1976-05-10
•
Granted: 1977-09-06
•
Expires: 1996-05-10
Abstract
Abstract Expansive and high strength cementitious pastes, mortars and concretes are produced by adding to a mix of water, cement and aggregates a mixture containing calcium oxide and/or magnesium oxide, a water-reducing agent and an additive for reducing or eliminating bleeding of the fresh mix.
Inventors
- 👤 Mario Collepardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:06
CPC Classifications
C; C04; C04B; C04B22/00; C04B22/06; C04B28/00; C04B28/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
61 words
A method for producing expansive and high strength cementitious pastes, mortars, and concretes, comprising adding to a mix of water, cement and aggregates a mixture containing: a compound selected from the group consisting of calcium oxide, magensium oxide or mixture thereof, and a water-reducing agent capable of reducing the water/cement ratio of the mix at least about 15% at constant workability.
Claim 2
Independent Claim
61 words
A method for producing expansive and high strength cementitious pastes, mortars, and concretes, comprising adding to a mix of water, cement and aggregates a mixture containing: a compound selected from the group consisting of calcium oxide, magensium oxide or mixture thereof, and a water-reducing agent capable of reducing the water/cement ratio of the mix at least about 15% at constant workability.
Claim 3
Dependent Claim
15 words
The method in accordance with claim 1 wherein the said oxide consists of commercial lime.
Claim 4
Dependent Claim
30 words
The method in accordance with claim 1 wherein the water-reducing agent comprises a polymer obtained by polycondensation of a free or salified sulphonic acid of the aromatic series, with formaldehyde.
Claim 5
Dependent Claim
32 words
The method in accordance with claim 1 wherein the water-reducing agent comprises a polymer obtained by polycondensation of melamine with formaldehyde and containing free or salified sulphonic groups in the heterocyclic rings.
Claim 6
Dependent Claim
26 words
The method as defined in claim 3 wherein the water-reducing agent consists of the polymer obtained by polycondensation of free or salified β-naphthalenesulphonic acid with formaldehyde.
Claim 7
Dependent Claim
26 words
The method as defined in claim 3 wherein the water-reducing agent consists of a polymer obtained by polycondensation of free or salified phenolsulphonic acid, with formaldehyde.
Claim 8
Dependent Claim
28 words
The method in accordance with claim 3 wherein the water-reducing agent consists of a polymer obtained by polycondensation of a free or salified benzene sulphonic acid, with formaldehyde.
Claim 9
Dependent Claim
35 words
The method in accordance with claim 3 wherein the water-reducing agent consists of a polymer obtained by polycondensation of a free or salified sulphonic acid of the aromatic series with formaldehyde, and containing methyl groups.
Claim 10
Dependent Claim
32 words
The method as defined in claim 8 wherein the water-reducing agent consists of a polymer obtained by polycondensation of a sodium salt of a sulphonic acid of the aromatic series, with formaldehyde.
Claim 11
Dependent Claim
20 words
The method in accordance with claim 1 wherein the percentage of the mixture is 0.5-40% by weight of said cement.
Claim 12
Dependent Claim
22 words
The method in accordance with claim 1 comprising adding to the mixture an additive for reducing the bleeding of the resulting mix.
Claim 13
Dependent Claim
38 words
The method in accordance with claim 11 wherein said additive is silica (SiO 2 ) having a specific surface area of not less than 2 × 10 4 cm 2 /gr determined by isothermal adsorption of a gas.
Claim 14
Dependent Claim
25 words
The method in accordance with claim 12 wherein the mixture has the following composition by weight: calcium oxide 45-65%; silica 30-50%; and water-reducing agent 1-12%.
Claim 15
Dependent Claim
19 words
The method in accordance with claim 12 wherein the percentage of the mixture is 0.5-40% by weight of cement.
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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |