US4726713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-hardening slurry mix
Assignee: Individual
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Filing: 1986-06-16
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Granted: 1988-02-23
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Expires: 2006-06-16
Abstract
Abstract An improved stable, clay/cementitious composition comprised of 15%-55% Attapulgite clay and 85%-45% slag cement particularly useful in the construction of very low permeability, self-hardening slurry trench cutoff walls, has been discovered. The aqueous slurries of the invention exhibit (1) an initial viscosity controllable without the addition of chemical, (2) lower filtrate loss and (3) chemical resistance, (4) lower permeability on curing, and (5) expedient handling.
Inventors
- 👤 Gilbert R. Tallard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:16
CPC Classifications
E; E02; E02D; E02D19/00; E02D19/06; E02D19/12; E02D19/16; C; C04; C04B; C04B28/00; C04B28/02; C04B28/08; C04B2111/00; C04B2111/00474; C04B2111/00724
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
35 words
A dry blend capable of forming a self-hardening mass when reacted with an aqueous component consisting essentially of: about 15 to 55% by weight Attapulgite clay and about 85 to 45% by weight slag cement.
Claim 2
Dependent Claim
35 words
A dry blend capable of forming a self-hardening mass when reacted with an aqueous component consisting essentially of: about 15 to 55% by weight Attapulgite clay and about 85 to 45% by weight slag cement.
Claim 3
Dependent Claim
13 words
A self-hardening aqueous slurry comprising water and the dry blend of claim 1.
Claim 4
Dependent Claim
18 words
A self-hardening aqueous slurry according to claim 2 having a viscosity of about 35 to 60 Marsh-cone seconds.
Claim 5
Dependent Claim
33 words
A self-hardening aqueous slurry consisting essentially of water and in a proportion by weight of said water of about 5 to 8% of Attapulgite clay and about 7.5 to 15% of slag cement.
Claim 6
Dependent Claim
33 words
A self-hardening aqueous slurry consisting essentially of water and in a proportion by weight of said water of about 5 to 8% of Attapulgite clay and about 7.5 to 15% of slag cement.
Claim 7
Dependent Claim
12 words
A cutoff wall comprised of the hardened aqueous slurry of claim 4.
Claim 8
Dependent Claim
17 words
A cutoff wall according to claim 5 exhibiting a permeability coefficient of less than 10 -7 cm/sec.
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) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |