US3867161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cement asphalt ballast grout composition for track
Assignee: Japan National Railways
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Filing: 1973-09-26
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Granted: 1975-02-18
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Expires: 1993-09-26
Abstract
Abstract A cement asphalt ballast grout composition comprising cement, an asphalt emulsion, calcium sulfoaluminate hydrate-forming mineral, an electrolyte, a thickener and a foaming agent is excellent in the workability of mortar and in the property of hardened mortar, and is suitable as a cement asphalt ballast grout composition for directly joining-type track.
Inventors
- 👤 Okihiko Torii
- 👤 Tsutomu Mizunuma
- 👤 Iwao Mino
- 👤 Tetsuya Ando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:52
CPC Classifications
E; E01; E01B; E01B1/00; E01B1/002; C; C04; C04B; C04B28/00; C04B28/02; C04B28/06; C04B28/065; C08; C08K; C08K3/00; C08K3/01; C08K3/013; C08K3/30; E01C; E01C7/00; E01C7/08; E01C7/18; E01C7/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
A CEMENT ASPHALT BALLAST GROUT COMPOSITION FOR DIRECTLY JOINING-TYPE TRACK, WHICH COMPRISES 100 PARTS BY WEIGHT OF CEMENT, 20-400 PARTS BY WEIGHT OF AN ASPHALT EMULSION, 520 PARTS BY WEIGHT OF A CALCIUM SULFOALUMINATE HYDRATEFORMING MINERAL, 0.1-5.0 PARTS BY WEIGHT OF A THICKENER AND 0.01 0.01-5.0 PARTS BY WEIGHT OF A THICKENER AND 0.01-0.03 PART BY WEIGHT OF A FOAMING AGENT.
Claim 2
Dependent Claim
61 words
A CEMENT ASPHALT BALLAST GROUT COMPOSITION FOR DIRECTLY JOINING-TYPE TRACK, WHICH COMPRISES 100 PARTS BY WEIGHT OF CEMENT, 20-400 PARTS BY WEIGHT OF AN ASPHALT EMULSION, 520 PARTS BY WEIGHT OF A CALCIUM SULFOALUMINATE HYDRATEFORMING MINERAL, 0.1-5.0 PARTS BY WEIGHT OF A THICKENER AND 0.01 0.01-5.0 PARTS BY WEIGHT OF A THICKENER AND 0.01-0.03 PART BY WEIGHT OF A FOAMING AGENT.
Claim 3
Dependent Claim
46 words
The grout composition as claimed in claim 1, wherein said calcium sulfoaluminate hydrate-forming mineral is a mixture of 85 - 95 percent by weight of a powdery calcium sulfoaluminate series mineral and 15 - 5 percent by weight of a powdery mineral consisting mainly of 3CaO.3Al2O3.CaF2.
Claim 4
Dependent Claim
37 words
The grout composition as claimed in claim 1, wherein said calcium sulfoaluminate hydrate-forming mineral has such a property that a cement mortar prepared from the mineral and cement has a free expansion coefficient of 0.5 - 0.5.
Claim 5
Dependent Claim
35 words
The grout composition as claimed in claim 1, wherein said electrolyte is at least one compound selected from the group consisting of sodium chloride, potassium chloride, lithium chloride, calcium chloride, magnesium chloride and barium chloride.
Claim 6
Dependent Claim
28 words
The grout composition as claimed in claim 1, wherein said thickener is at least one compound selected from the group consisting of polyvinyl alcohol, carboxymethylcellulose, starch and gelatine.
Claim 7
Dependent Claim
32 words
The grout composition as claimed in claim 1, wherein said foaming agent is at least one compound selected from the group consisting of aluminum, aluminum nitride, zinc, tin and calcium silicon alloy.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |