USRE32206E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making asphalt concrete
Assignee: Paul E. Bracegirdle
•
Filing: 1985-03-27
•
Granted: 1986-07-15
•
Expires: 2005-03-27
Abstract
Abstract A process for making asphalt concrete comprises mixing starting materials including aggregate and binder material and optionally, other additives, to a final temperature of about 60° C. to about 150° C. in an indirectly heated mixing chamber which is sealed. The moisture content of the asphalt concrete mixture is controlled as a function of the moisture content of the starting materials. Apparatus for performing the process in a continuous or batch operation is also set forth.
Inventors
- 👤 Paul E. Bracegirdle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:49
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/02; E01C19/10; E01C19/1004; E01C19/1013; E01C19/104; E01C19/1045; E01C19/1059; E01C19/1068
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
107 words
A process for making asphalt concrete comprising: (a) selectively sealing a mixture of starting materials comprising aggregate and binder, such that said mixture does not communicate with the atmosphere, (b) mixing and indirectly heating said mixture while so sealed, and (c) controlling the moisture content of said mixture to a predetermined amount by either removing moisture from said mixture in the form of water vapor when said moisture content is greater than said predetermined amount until said moisture content equals said predetermined amount, or adding water into said mixture when said moisture content is less than said predetermined amount until said moisture content equals said predetermined amount.
Claim 2
Dependent Claim
107 words
A process for making asphalt concrete comprising: (a) selectively sealing a mixture of starting materials comprising aggregate and binder, such that said mixture does not communicate with the atmosphere, (b) mixing and indirectly heating said mixture while so sealed, and (c) controlling the moisture content of said mixture to a predetermined amount by either removing moisture from said mixture in the form of water vapor when said moisture content is greater than said predetermined amount until said moisture content equals said predetermined amount, or adding water into said mixture when said moisture content is less than said predetermined amount until said moisture content equals said predetermined amount.
Claim 3
Dependent Claim
27 words
A process in accordance with claim 1 wherein said binder material is selected from the group consisting of asphalt cement, asphalt cement-water emulsions, sulfur, and mixtures thereof.
Claim 4
Dependent Claim
15 words
A process in accordance with claim 1 including adding a surfactant to said mixing chamber.
Claim 5
Dependent Claim
28 words
A process in accordance with claim 1 including the further step of detecting the moisture content of the starting materials prior to said mixing and indirect heating thereof.
Claim 6
Dependent Claim
25 words
A process in accordance with claim 1 wherein said aggregate is selected from the group consisting of raw virgin aggregate, recycled aggregate, and mixtures thereof.
Claim 7
Dependent Claim
28 words
A process in accordance with claim 1 wherein said mixture is heated to a final temperature in the range of between about 60° C. and about 150° C.
Claim 8
Dependent Claim
30 words
A process in accordance with claim 1 wherein said moisture content of said mixture is adjusted to a moisture content in the range of between about 0.1% and about 10%.
Claim 9
Dependent Claim
41 words
A process in accordance with claim 1 including heating said mixture to a temperature in excess of 100° C., and removing moisture from said mixture in the form of water vapor by virtue of the vapor pressure of said water vapor.
Claim 10
Dependent Claim
18 words
A process in accordance with claim 1 which further comprises condensing said water vapor when moisture is removed.
Claim 11
Dependent Claim
189 words
A process in accordance with claim 9 further comprising the step of recycling gases back to said mixture after condensing said water vapor. .Iadd.11. In a process for making asphalt concrete (a) selectively sealing a mixture of starting materials including aggregate in a mixing chamber such that said mixture does not communicate with the atmosphere, (b) indirectly heating said mixture while so sealed, (c) evaporating some moisture from said mixture to form water vapor, (d) condensing said water vapor by indirectly exchanging the heat in said water vapor to at least one of said starting materials which heats said starting material prior to the sealing of said mixture in said mixing chamber. .Iaddend. .Iadd.12. A process for making asphalt concrete comprising: (a) selectively sealing a mixture of starting materials comprising aggregate and binder, such that said mixture does not communicate with the atmosphere, (b) mixing and indirectly heating said mixture while so sealed, (c) evaporating some moisture from said mixture to form water vapor, (d) condensing said water vapor by indirectly exchanging the heat in said water vapor to at least one of said starting materials which heats said
Claim 12
Dependent Claim
334 words
starting material prior to said mixing step. .Iaddend. .Iadd.13. A process in accordance with claim 12 further comprising heating said mixture to a temperature in excess of 100° C. .Iaddend. .Iadd.14. A process in accordance with claim 13 further comprising heating said mixture to a temperature at which a positive vapor pressure is created sufficient to cause said water vapor to migrate under its own pressure from a mixing means in which said mixture is mixed to a condensing means in which said water vapor is condensed. .Iaddend. .Iadd.15. A process in accordance with claim 12 wherein said moisture is evaporated until said mixture has a moisture content in the range of between about 0.1% and about 10%. .Iaddend. .Iadd.16. A process for making asphalt concrete comprising: (a) selectively sealing a mixture of starting materials comprising aggregate and binder, such that said mixture does not communicate with the atmosphere, (b) mixing and indirectly heating said mixture while so sealed, (c) evaporating pollutants and some moisture from said mixture to form gases and water vapor, (d) condensing said gases and said water vapor by indirectly transferring heat contained therein to at least one of said starting materials. .Iaddend. .Iadd.17. A process in accordance with claim 16 further comprising removing pollutants from said condensed gases and water vapor. .Iaddend. .Iadd.18. A process in accordance with claim 16 further comprising heating said mixture to a temperature in excess of 100° C. .Iaddend. .Iadd.19. A process in accordance with claim 18 further comprising heating said mixture to a temperature at which a positive vapor pressure is created sufficient to cause said gases and said water vapor to migrate under their own pressure from a mixing means in which said mixture is mixed to a condensing means in which said gases and said water vapor is condensed. .Iaddend. .Iadd.20. A process in accordance with claim 16 wherein said moisture is evaporated until said mixture has a moisture content in the range of between about 0.1% and about 10%. .Iaddend.
References Cited (Backward Citations)
US29496A
Cited
US484735A
Cited
US725693A
Cited
US1188081A
Cited
US1370764A
Cited
US1443529A
Cited
US1717465A
Cited
US1789021A
Cited
US1868512A
Cited
US1984315A
Cited
US1966647A
Cited
US2015056A
Cited
US2125860A
Cited
US2305603A
Cited
US2256281A
Cited
US2477412A
Cited
US2487887A
Cited
US2540706A
Cited
US2609305A
Cited
US2519148A
Cited
US2491194A
Cited
US2611590A
Cited
US2715517A
Cited
US2958107A
Cited
US2721806A
Cited
US2710744A
Cited
DE925277C
Cited
US2758823A
Cited
US2731241A
Cited
US3056588A
Cited
DE1191786B
Cited
US2900109A
Cited
US3020025A
Cited
US3106384A
Cited
US3207588A
Cited
US3250321A
Cited
US3285330A
Cited
US3263748A
Cited
AT257676B
Cited
US3300193A
Cited
US3456906A
Cited
US3480260A
Cited
GB1219368A
Cited
US3484083A
Cited
US3500901A
Cited
US3486940A
Cited
US3627014A
Cited
US3592453A
Cited
US3778035A
Cited
US3583172A
Cited
US3601373A
Cited
DE2062358A1
Cited
GB1340762A
Cited
DE2217704A1
Cited
GB1400721A
Cited
US3812821A
Cited
US3832201A
Cited
US3762947A
Cited
US3752653A
Cited
US3765481A
Cited
US3880410A
Cited
US3975002A
Cited
US3845941A
Cited
US3971666A
Cited
US4000000A
Cited
GB1443424A
Cited
DE2351094A1
Cited
US4025057A
Cited
US3840215A
Cited
USRE29496E
Cited
US3793745A
Cited
CH567628A5
Cited
US4034968A
Cited
US4066247A
Cited
US4074894A
Cited
US4067552A
Cited
US3940120A
Cited
AU1011976A
Cited
DE2606422A1
Cited
GB1476097A
Cited
US4007016A
Cited
US4040768A
Cited
US3999743A
Cited
DE2712102B1
Cited
US4136964A
Cited
US4126519A
Cited
US4144359A
Cited
DE2827608A1
Cited
DE2848145B1
Cited
GB2036574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |