US4748788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface seeded exposed aggregate concrete and method of producing same
Assignee: Shaw Craftsman Concrete LLC
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Filing: 1987-07-01
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Granted: 1988-06-07
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Expires: 2007-07-01
Abstract
Abstract An improved surface seeded exposed aggregate concrete and method of use is disclosed characterized by use of small, rounded aggregate, preferably sand, being broadcast over the upper surface of the concrete. The broadcast aggregate is mixed into the cement paste derived from the concrete matrix by magnesium hand floats and finished by hand sponging. A surface retarder and vapor barrier is than applied to cover the concrete surface for approximately four to twenty four hours. Subsequently, any surface film is washed from the surface of the concrete and the concrete is cured by fogging or soaker hose. Approximately thirty days later, the surface residue is removed from the concrete with a stem/acid wash providing an exposed aggregate concrete having extreme flatness and high wear resistance suitable for high traffic areas and improved asthetics resembling stone, granite or marble.
Inventors
- 👤 Ronald D. Shaw
- 👤 Lee A. Shaw
- 👤 LeRoy E. Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:44
CPC Classifications
E; E04; E04F; E04F15/00; E04F15/12; C; C04; C04B; C04B41/00; C04B41/53; C04B41/5323; E04F21/00; E04F21/20; E04F21/24
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
167 words
A method of producing surface seeded exposed aggregate concrete having a generally flat exposed aggregate surface suitable for flooring applications comprising the steps of: preparing the subgrade to a desired grade; pouring a concrete mixture over said subgrade; screeding said concrete mixture to a desired grade; finishing the upper surface of said concrete mixture with a magnesium bull float to seal said upper surface and dispose a quantity of cement/fines paste derived from said concrete mixture at said upper surface of said concrete mixture; broadcasting a quantity of aggregate having a mean diameter size of less than three-eights of one inch upon said upper surface of said concrete mixture; mixing said quantity of aggregate into said quantity of cement/fines paste with a magnesium hand float; applying a surface retarder uniformly over said upper surface of said concrete mixture; washing surface films from said upper surface of said concrete mixture; curing said concrete mixture; and washing said upper surface of said concrete mixture to remove surface residue therefrom.
Claim 2
Independent Claim
167 words
A method of producing surface seeded exposed aggregate concrete having a generally flat exposed aggregate surface suitable for flooring applications comprising the steps of: preparing the subgrade to a desired grade; pouring a concrete mixture over said subgrade; screeding said concrete mixture to a desired grade; finishing the upper surface of said concrete mixture with a magnesium bull float to seal said upper surface and dispose a quantity of cement/fines paste derived from said concrete mixture at said upper surface of said concrete mixture; broadcasting a quantity of aggregate having a mean diameter size of less than three-eights of one inch upon said upper surface of said concrete mixture; mixing said quantity of aggregate into said quantity of cement/fines paste with a magnesium hand float; applying a surface retarder uniformly over said upper surface of said concrete mixture; washing surface films from said upper surface of said concrete mixture; curing said concrete mixture; and washing said upper surface of said concrete mixture to remove surface residue therefrom.
Claim 3
Dependent Claim
37 words
The method of claim 1 wherein said applying of said surface retarder causes penetration of said surface retarder into said upper surface of said concrete mixture through a distance greater than the mean diameter of said aggregate.
Claim 4
Dependent Claim
11 words
The method of claim 2 wherein said aggregate comprises coarse sand.
Claim 5
Dependent Claim
13 words
The method of claim 3 wherein said aggregate comprises Monterey Aquarium coarse sand.
Claim 6
Dependent Claim
34 words
The method of claim 4 wherein said Monterey Aquarium coarse sand is broadcast over the upper surface of said concrete mixture at an approximate rate of one pound per square foot of concrete mixture.
Claim 7
Dependent Claim
27 words
The method of claim 4 wherein said mixing step comprises using a magnesium hand float in a circular motion to cover said aggregate with said cement/fines paste.
Claim 8
Dependent Claim
38 words
The method of claim 6 wherein between said mixing and said applying said surface retarder steps, said method comprises the further step of: sponging in a circular motion any areas of said upper surface of said concrete mixture.
Claim 9
Dependent Claim
35 words
The method of claim 7 wherein said washing of surface film comprises the steps of applying water to said upper surface of said concrete mixture and lightly brushing said upper surface of said concrete mixture.
Claim 10
Dependent Claim
27 words
The method of claim 8 wherein said lightly brushing step removes no more than five percent of said aggregate from said upper surface of said concrete mixture.
Claim 11
Dependent Claim
38 words
The method of claim 9 wherein between said applying of said surface retarder and said washing surface film step said method comprises the further step of covering said upper surface of said concrete mixture with a vapor barrier.
Claim 12
Dependent Claim
37 words
The method of claim 10 wherein said washing of said upper surface of said concrete mixture to remove surface residue therefrom comprises washing said upper surface of said concrete with a mixture of water and muriatic acid.
Claim 13
Dependent Claim
28 words
The method of claim 10 wherein said covering said upper surface of said concrete mixture with a vapor barrier extends for a period of three to twenty-four hours.
Claim 14
Dependent Claim
19 words
The method of claim 12 wherein said curing step comprises curing said concrete mixture by use of a fogger.
Claim 15
Dependent Claim
20 words
The method of claim 13 wherein said curing step comprises curing said concrete mixture by use of a soaker hose.
Claim 16
Dependent Claim
20 words
The method of claim 12 wherein said preparing of the subgrade comprises compacting the subgrade to approximately ninety percent compaction.
Claim 17
Dependent Claim
29 words
The method of claim 15 wherein said preparing of the subgrade further comprises the step of placing a layer of sand between said subgrade and said poured concrete mixture.
Claim 18
Dependent Claim
25 words
The method of claim 16 comprising the further step of placing reinforcement means upon said prepared subgrade to be disposed within said poured concrete mixture.
Claim 19
Dependent Claim
22 words
The method of claim 17 wherein said pouring step comprises the further step of mixing said concrete mixture with a color additive.
Claim 20
Dependent Claim
14 words
A surface seeded exposed aggregate concrete product formed by the method of claim 18.
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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) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |