US4002482A
Expired / Lapsed
US
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Glass compositions suitable for incorporation into concrete
Assignee: Schott AG
•
Filing: 1975-11-18
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Granted: 1977-01-11
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Expires: 1995-11-18
Abstract
Abstract Glasses suitable for use as long term reinforcing agents for a cementitious matrix, e.g., Portland cement, or concrete. The glasses are preferably in the form of continuous filaments, short fibers, hollow spheres, or foamed glasses and have a composition consisting essentially of: ______________________________________ Weight Percent ______________________________________ SiO 2 20-70 TiO 2 3-12 ZnO 5-70 CuO 0-10 Fe 2 O 3 0-5 BaO 0-30 CaO 0-10 MgO 0-15 Al 2 O 3 0-30 ______________________________________
Inventors
- 👤 Matthias Christian Coenen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:35
CPC Classifications
C; C03; C03C; C03C13/00; C03C11/00; C03C11/002; C03C13/001; C03C3/00; C03C3/04; C03C3/076; C03C3/078; C03C3/083; C04; C04B; C04B14/00; C04B14/02; C04B14/04; C04B14/22; C04B14/24
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
166 words
Glasses suitable for use as a long term reinforcing agent in concrete or in other cementitious matrix and having a composition consisting essentially of: ______________________________________
Weight Percent
______________________________________
SiO.sub.2 20- 70
TiO.sub.2 3- 12
ZnO 5- 70
CuO 0- 10
Fe.sub.2 O.sub.3 0- 5
BaO 0- 30
CaO 0- 10
MgO 0- 15
Al.sub.2 O.sub.3 0- 30
______________________________________
wherein the ratio of the molar sum of Al.sub.2 O.sub.3 + MgO + CaO to the
molar sum of ZnO + CuO + TiO.sub.2 + Fe.sub.2 O.sub.3 present in the
composition is equal to or less than 0.5, in which metallic oxides
selected from the group consisting of As.sub.2 O.sub.3, Sb.sub.2 O.sub.3,
V.sub.2 O.sub.5, B.sub.2 O.sub.3, PbO, CdO, SnO.sub.2 and M.sub.2 O
wherein M is an alkali metal, if present, amount to not greater than 0.4
mole % altogether, and whereby said composition delays the curing of said
concrete or cementitious matrix and increases the formation of heat when
said composition reacts with said concrete or cementitious matrix.
Claim 2
Dependent Claim
166 words
Glasses suitable for use as a long term reinforcing agent in concrete or in other cementitious matrix and having a composition consisting essentially of: ______________________________________
Weight Percent
______________________________________
SiO.sub.2 20- 70
TiO.sub.2 3- 12
ZnO 5- 70
CuO 0- 10
Fe.sub.2 O.sub.3 0- 5
BaO 0- 30
CaO 0- 10
MgO 0- 15
Al.sub.2 O.sub.3 0- 30
______________________________________
wherein the ratio of the molar sum of Al.sub.2 O.sub.3 + MgO + CaO to the
molar sum of ZnO + CuO + TiO.sub.2 + Fe.sub.2 O.sub.3 present in the
composition is equal to or less than 0.5, in which metallic oxides
selected from the group consisting of As.sub.2 O.sub.3, Sb.sub.2 O.sub.3,
V.sub.2 O.sub.5, B.sub.2 O.sub.3, PbO, CdO, SnO.sub.2 and M.sub.2 O
wherein M is an alkali metal, if present, amount to not greater than 0.4
mole % altogether, and whereby said composition delays the curing of said
concrete or cementitious matrix and increases the formation of heat when
said composition reacts with said concrete or cementitious matrix.
Claim 3
Dependent Claim
20 words
Glasses according to claim 1, wherein said composition contains from 10 - 15 weight percent Al 2 O 3 .
Claim 4
Dependent Claim
16 words
Glasses according to claim 1, wherein said composition contains from 8 - 15 weight percent MgO.
Claim 5
Dependent Claim
16 words
Glasses according to claim 2, wherein said composition contains from 8 - 15 weight percent MgO.
Claim 6
Dependent Claim
16 words
Glasses according to claim 1, wherein said composition contains from 0 - 10 weight percent CuO.
Claim 7
Dependent Claim
16 words
Glasses according to claim 4, wherein said composition contains from 0 - 10 weight percent CuO.
Claim 8
Dependent Claim
12 words
Glasses according to claim 1, wherein said glass is extruded into fibers.
Claim 9
Dependent Claim
14 words
Glasses according to claim 1, wherein said glasses are hollow spheres or foamed glasses.
Claim 10
Dependent Claim
42 words
A cementitious product comprising (1) a cementitious matrix, having incorporated therein (2) at least one reinforcing material having a composition according to claim 1, and (3) the reaction product of (1) and (2) located on the surface of the glass reinforcing material.
Claim 11
Dependent Claim
13 words
The cementitious product of claim 9, wherein said cementitious matrix is Portland cement.
Claim 12
Dependent Claim
12 words
The cementitous product of claim 9, wherein said cementitious matrix is concrete.
Claim 13
Dependent Claim
20 words
The cementitious product of claim 9 wherein said reinforcing material is in the form of hollow spheres or foamed glasses.
Claim 14
Dependent Claim
13 words
The cementitious product of claim 12, wherein said cementitious matrix is Portland cement.
Claim 15
Dependent Claim
12 words
The cementitious product of claim 12, wherein said cementitious matrix is concrete.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |