US4244747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified asphalt paving compositions
Assignee: CHEMKRETE TECHNOLOGIES Inc
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Filing: 1979-03-12
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Granted: 1981-01-13
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Expires: 1999-03-12
Abstract
Abstract A modified asphalt cement including manganese chloride (MnCl 2 ) dispersed throughout the asphalt cement. A paving composition including the above material forming a binder for aggregate used for paving roads or the like.
Inventors
- 👤 John B. Leonard, Jr.
- 👤 Philip T. Selfridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:51
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/18; C; C08; C08K; C08K3/00; C08K3/16; Y; Y02; Y02A; Y02A30/00; Y02A30/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
101 words
A modified asphalt cement composition capable of improving the compressive strength characteristics of an aggregate-containing paving composition made therefrom comprising (a) a substantially unblown, unoxidized and unmodified asphalt cement having bitumens as a predominant constituent and being generally characterized by a penetration of less than about 400 measured at 25° C. and a viscosity greater than 65 poise at 60° C., and (b) between about 0.02 and 2.0 percent by weight of said unmodified asphalt cement of manganese chloride of copper chloride, alone or in combination, said manganese or copper chloride being uniformly dispersed or substantially dissolved in said asphalt cement.
Claim 2
Dependent Claim
101 words
A modified asphalt cement composition capable of improving the compressive strength characteristics of an aggregate-containing paving composition made therefrom comprising (a) a substantially unblown, unoxidized and unmodified asphalt cement having bitumens as a predominant constituent and being generally characterized by a penetration of less than about 400 measured at 25° C. and a viscosity greater than 65 poise at 60° C., and (b) between about 0.02 and 2.0 percent by weight of said unmodified asphalt cement of manganese chloride of copper chloride, alone or in combination, said manganese or copper chloride being uniformly dispersed or substantially dissolved in said asphalt cement.
Claim 3
Dependent Claim
32 words
The modified asphalt cement composition of claim 1 wherein the combined concentration of manganese chloride or copper chloride is between about 0.1 and 0.5 percent by weight of said unmodified asphalt cement.
Claim 4
Dependent Claim
19 words
The modified asphalt cement composition of claim 1 wherein said manganese or copper chlorides are present in anhydrous form.
Claim 5
Dependent Claim
12 words
A paving composition containing the modified asphalt cement composition of claim 1.
Claim 6
Dependent Claim
87 words
A paving composition having improved compressive strength characteristics comprising, a substantially unblown, unoxidized and unmodified asphalt cement having bitumens as its predominant constituent and being generally characterized by a penetration of less than about 400 measured at 25° C. and a viscosity greater than 65 poise at 60° C., an aggregate mixed with said asphalt, and between about 0.02 and 2.0 percent by weight of manganese chloride or copper chloride, based upon the weight of said asphalt component, uniformly dispersed or substantially dissolved in said asphalt component.
Claim 7
Dependent Claim
87 words
A paving composition having improved compressive strength characteristics comprising, a substantially unblown, unoxidized and unmodified asphalt cement having bitumens as its predominant constituent and being generally characterized by a penetration of less than about 400 measured at 25° C. and a viscosity greater than 65 poise at 60° C., an aggregate mixed with said asphalt, and between about 0.02 and 2.0 percent by weight of manganese chloride or copper chloride, based upon the weight of said asphalt component, uniformly dispersed or substantially dissolved in said asphalt component.
Claim 8
Dependent Claim
20 words
The paving composition of claim 5 in which at least 85 percent by weight of said total composition is aggregate.
Claim 9
Independent Claim
113 words
A method of forming a paving composition comprising the steps of: (a) heating a substantially unblown, unoxidized and unmodified asphalt cement having bitumens as its predominant component to a temperature sufficient to cause said asphalt cement to become flowable, (b) mixing said flowable asphalt cement with between about 0.02 and 2.0 percent by weight of manganese or copper chlorides for a time sufficient to permit said manganese or copper chlorides to become either uniformly dispersed or substantially dissolved in said flowable asphalt cement, and (c) adding at least 85 percent by weight of an aggregate, based upon the total weight of said paving composition, to said manganese or copper chloride containing asphalt cement.
Claim 10
Independent Claim
113 words
A method of forming a paving composition comprising the steps of: (a) heating a substantially unblown, unoxidized and unmodified asphalt cement having bitumens as its predominant component to a temperature sufficient to cause said asphalt cement to become flowable, (b) mixing said flowable asphalt cement with between about 0.02 and 2.0 percent by weight of manganese or copper chlorides for a time sufficient to permit said manganese or copper chlorides to become either uniformly dispersed or substantially dissolved in said flowable asphalt cement, and (c) adding at least 85 percent by weight of an aggregate, based upon the total weight of said paving composition, to said manganese or copper chloride containing asphalt cement.
Claim 11
Dependent Claim
26 words
The method of claim 7 wherein said unmodified asphalt cement is heated to a temperature between about 100° C. and 225° C. to make it flowable.
Claim 12
Dependent Claim
35 words
The method of claim 7 wherein said manganese or copper chloride-containing asphalt cement is allowed to cool to ambient temperatures, is stored, and thereafter is reheated to a flowable condition and mixed with said aggregate.
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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) | 1984-01-13 | 1984-07-14 | 1985-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-13 | 1988-07-14 | 1989-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-13 | 1992-07-14 | 1993-01-13 | $7700.00 | Window Closed / Lapsed |