US4021258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete structure and method of preparing same
Assignee: Teijin Ltd
•
Filing: 1974-12-20
•
Granted: 1977-05-03
•
Expires: 1994-12-20
Abstract
Abstract A concrete structure containing in its body short fibers and at least one piece of cloth in an intertwined state is produced by disposing at least one piece of cloth in a form, pouring into said form a cement slurry composed of water, short fibers and a material selected from the group consisting of the hydraulic and air setting substances, allowing the cement slurry to set, and thereafter removing the form.
Inventors
- 👤 Shinobu Uogaeshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:55
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/07; C; C04; C04B; C04B20/00; C04B20/0048; E04C2/00; E04C2/02; E04C2/04; E04C2/06; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249956; Y10T428/249986; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/171
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
89 words
A concrete structure comprising a hydraulic or air set cement, a cloth fabric having a sufficiently open weave to permit the passage of cement paste therethrough, said cloth being disposed in the whole of the surface zone of said structure and short fibers having a diameter of 5-100 microns and a length of 5-30 mm contained in an amount of from 0.2-2% based on the weight of cement, said short fibers being uniformly dispersed throughout the structure and a portion of said fibers being intertwined with said cloth fabric.
Claim 2
Dependent Claim
89 words
A concrete structure comprising a hydraulic or air set cement, a cloth fabric having a sufficiently open weave to permit the passage of cement paste therethrough, said cloth being disposed in the whole of the surface zone of said structure and short fibers having a diameter of 5-100 microns and a length of 5-30 mm contained in an amount of from 0.2-2% based on the weight of cement, said short fibers being uniformly dispersed throughout the structure and a portion of said fibers being intertwined with said cloth fabric.
Claim 3
Dependent Claim
27 words
The concrete structure of claim 1 wherein the cloth fabric is a plain weave fabric containing 5-30 count yarns at a density of 10-25 ends per inch.
Claim 4
Dependent Claim
10 words
The concrete structure of claim 1 containing air bubbles therein.
Claim 5
Independent Claim
108 words
A method of preparing concrete structure having a cloth fabric disposed in the whole of the surface zone thereof and short fibers uniformly dispersed throughout the structure with a portion of such fibers being intertwined with the cloth fabric, comprising disposing the cloth fabric adjacent to the whole of the inner walls of a form, filling said form with a cement slurry containing water, a material selected from hydraulic and air setting substances and from 0.2-2% based on the weight of said material of short fibers having a diameter of from 5-100 microns and a length of from 5-30 mm, curing said cement slurry and removing said form.
Claim 6
Independent Claim
108 words
A method of preparing concrete structure having a cloth fabric disposed in the whole of the surface zone thereof and short fibers uniformly dispersed throughout the structure with a portion of such fibers being intertwined with the cloth fabric, comprising disposing the cloth fabric adjacent to the whole of the inner walls of a form, filling said form with a cement slurry containing water, a material selected from hydraulic and air setting substances and from 0.2-2% based on the weight of said material of short fibers having a diameter of from 5-100 microns and a length of from 5-30 mm, curing said cement slurry and removing said form.
Claim 7
Dependent Claim
29 words
The method of claim 3 wherein said cloth fabric is a plain weave fabric containing 5-30 count yarns at a density of from 10 to 25 ends per inch.
Claim 8
Dependent Claim
12 words
The method of claim 3 wherein said cement slurry contains air bubbles.
Claim 9
Dependent Claim
37 words
The method of claim 5 wherein said plain weave fabric is treated with an aqueous solution of a water soluble resin selected from the group consisting of methyl cellulose, hydroxypropyl methyl cellulose, polyvinyl alcohol and polyvinyl pyrrolidone.
Claim 10
Dependent Claim
33 words
The method of claim 4 which further comprises disposing an additional cloth fabric in the form about midway between the walls of the form prior to filling said form with said cement slurry.
Claim 11
Dependent Claim
27 words
The method of claim 8 wherein said additional cloth fabric is a plain weave fabric containing 5-30 count yarns at a density of 10-25 ends per inch.
Claim 12
Independent Claim
128 words
The method of preparing a concrete structure having a plain weave fabric disposed in the whole of the surface zone thereof and short fibers uniformly dispersed throughout the structure with a portion of such fibers being intertwined with said plain weave fabric, comprising placing said plain weave fabric at the whole of the bottom of a form, said plain weave fabric containing 5-30 count yarns at a density of 10-25 ends per inch, filling said form with a cement slurry containing water, a material selected from hydraulic and air setting substances and from 0.2 to 2% based on the weight of said material of short fibers having a diameter of from 5-100 microns and a length of from 5-30 millimeters, curing said cement slurry and removing said form.
Claim 13
Independent Claim
128 words
The method of preparing a concrete structure having a plain weave fabric disposed in the whole of the surface zone thereof and short fibers uniformly dispersed throughout the structure with a portion of such fibers being intertwined with said plain weave fabric, comprising placing said plain weave fabric at the whole of the bottom of a form, said plain weave fabric containing 5-30 count yarns at a density of 10-25 ends per inch, filling said form with a cement slurry containing water, a material selected from hydraulic and air setting substances and from 0.2 to 2% based on the weight of said material of short fibers having a diameter of from 5-100 microns and a length of from 5-30 millimeters, curing said cement slurry and removing said form.
Claim 14
Dependent Claim
95 words
The method of claim 10 wherein said form is a horizontal form further comprising prior to curing said cement slurry, placing additional plain weave fabric over said poured cement slurry, pouring additional cement slurry over said additional cloth, further covering said additional cement slurry with yet additional plain weave fabric, allowing the cement slurry to set and thereafter removing the form to thereby prepare a concrete structure of sheet form containing plain weave fabric at both the top and bottom surface zones thereof as well as plain weave fabric in the interior of said structure.
Claim 15
Independent Claim
129 words
The method of preparing a concrete structure containing a plain weave fabric disposed in the whole of at least one surface zone thereof and short fibers uniformly dispersed throughout the structure with a portion of such fibers being intertwined with said plain weave fabric, comprising forming a layer of a cement slurry composed of water, a material selected from hydraulic and air setting substances and from 0.2-2% based on the weight of said material of short fibers having a diameter of from 5-100 microns and a length of from 5-30 mm, placing plain weave fabric containing 5-30 count yarns at a density of 10-25 ends per inch in contact with the whole of the exposed surface of said poured cement slurry and thereafter allowing the cement slurry to set.
Claim 16
Independent Claim
129 words
The method of preparing a concrete structure containing a plain weave fabric disposed in the whole of at least one surface zone thereof and short fibers uniformly dispersed throughout the structure with a portion of such fibers being intertwined with said plain weave fabric, comprising forming a layer of a cement slurry composed of water, a material selected from hydraulic and air setting substances and from 0.2-2% based on the weight of said material of short fibers having a diameter of from 5-100 microns and a length of from 5-30 mm, placing plain weave fabric containing 5-30 count yarns at a density of 10-25 ends per inch in contact with the whole of the exposed surface of said poured cement slurry and thereafter allowing the cement slurry to set.
Claim 17
Dependent Claim
53 words
The method of claim 12 further comprising, prior to allowing said cement slurry to set, forming an additional layer of said cement slurry over said plain weave fabric and placing additional plain weave fabric over the exposed surface of said additional layer of cement slurry and thereafter allowing the cement slurry to set.
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) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |