US3982954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pozzolan and concrete product thereof
Assignee: Mt Lassen Cinder Co
•
Filing: 1974-04-12
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Granted: 1976-09-28
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Expires: 1994-04-12
Abstract
Abstract An improved pozzolan is fabricated from scoria cinder processed to a particle size below 10,000 Blaine. When incorporated with the cement in a concrete mixture, this pozzolan imparts rapid tensile strength to the concrete upon curing. A new and improved concrete is also provided which consists solely of cement and scoria cinder aggregate of graded particle size.
Inventors
- 👤 Carl C. Jeskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:52
CPC Classifications
C; C04; C04B; C04B14/00; C04B14/02; C04B14/04; C04B14/14; C04B7/00; C04B7/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
71 words
A concrete mixture comprising coarse aggregate, fine aggregate, and a mixture of cement and sufficient ground scoria cinder of an average particle size in the range between 2,000 to 10,000 Blaine to provide a rapid cure cement of increased tensile strength, wherein said scoria cinder is substantially of the following composition: ______________________________________
SiO.sub.2 48.2
Fe.sub.2 O.sub.3 5.0
Al.sub.2 O.sub.3 14.8
CaO 17.4
MgO 7.0
SO.sub.3 0.2
______________________________________
in parts by weight.
Claim 2
Dependent Claim
71 words
A concrete mixture comprising coarse aggregate, fine aggregate, and a mixture of cement and sufficient ground scoria cinder of an average particle size in the range between 2,000 to 10,000 Blaine to provide a rapid cure cement of increased tensile strength, wherein said scoria cinder is substantially of the following composition: ______________________________________
SiO.sub.2 48.2
Fe.sub.2 O.sub.3 5.0
Al.sub.2 O.sub.3 14.8
CaO 17.4
MgO 7.0
SO.sub.3 0.2
______________________________________
in parts by weight.
Claim 3
Dependent Claim
21 words
The concrete mixture of claim 1 wherein the scoria cinder comprises 10% to 30% by weight of the cement-scoria cinder mixture.
Claim 4
Dependent Claim
26 words
The concrete mixture of claim 2 wherein the coarse aggregate is gravel, the fine aggregate sand, and the scoria cinder has a Blaine size of 3,400.
Claim 5
Dependent Claim
42 words
A concrete mixture comprising cement and scoria cinder aggregate of graded particle size, wherein said scoria cinder has substantially the following composition: ______________________________________
SiO.sub.2 48.2
Fe.sub.2 O.sub.3 5.0
Al.sub.2 O.sub.3 14.8
CaO 17.4
MgO 7.0
SO.sub.3 0.2
______________________________________ in parts by weight.
Claim 6
Dependent Claim
42 words
A concrete mixture comprising cement and scoria cinder aggregate of graded particle size, wherein said scoria cinder has substantially the following composition: ______________________________________
SiO.sub.2 48.2
Fe.sub.2 O.sub.3 5.0
Al.sub.2 O.sub.3 14.8
CaO 17.4
MgO 7.0
SO.sub.3 0.2
______________________________________ in parts by weight.
Claim 7
Dependent Claim
37 words
The concrete of claim 4 wherein about 18.8% of the scoria cinder aggregate has a particle size smaller than 100 mesh, and about 10.7% of the scoria cinder aggregate has a particle size smaller than 200 mesh.
References Cited (Backward Citations)
US2752261A
Cited
US2786531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |