Compositions: coating or plastic – Coating or plastic compositions – Bituminous material or tarry residue
Patent
1996-03-25
1998-05-26
Brunsman, David
Compositions: coating or plastic
Coating or plastic compositions
Bituminous material or tarry residue
10628406, 1062844, C09D19500
Patent
active
057558655
ABSTRACT:
A composition for rejuvenating asphalt comprises between 5-25% by weight shale oil modifier and between 75-95% by weight asphalt cement. The asphalt cement may consist of an AC-10 binder or an AC-20 binder. The shale oil modifier is made of dehydrogenated crude shale oil, the shale oil modifier exhibiting non-Newtonian properties when mixed with asphalt cements. A recycled asphalt pavement consists of the above-described rejuvenating composition and an aggregate composition comprising between about 30-40% recycled asphalt pavement and between about 60-70% virgin aggregate. A method for rejuvenating asphalt pavement includes milling and collecting a select thickness of asphalt pavement of a portion of an existing roadbed. A shale oil modified asphalt comprising between about 5-25% shale oil modifier and 75-95% asphalt cement is provided. An aggregate comprising about 60-70% virgin aggregate and about 30-40% of the milled and collected asphalt is combined with the shale oil modified asphalt and then applied to the portion of the existing roadbed.
REFERENCES:
patent: 4325738 (1982-04-01), Plancher et al.
patent: 4948468 (1990-08-01), Reeves et al.
Brunsman David
The New Paraho Corporation
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